{"id":7478,"date":"2026-10-10T08:59:05","date_gmt":"2026-10-10T08:59:05","guid":{"rendered":"https:\/\/www.lyafs.com\/?page_id=7478"},"modified":"2026-10-16T10:00:21","modified_gmt":"2026-10-16T10:00:21","slug":"aluminum-casting","status":"publish","type":"page","link":"https:\/\/www.lyafs.com\/ru\/services\/aluminum-casting\/","title":{"rendered":"\u041b\u0438\u0442\u044c\u0435 \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f"},"content":{"rendered":"<main id='oxy-main'><section class=\"oxy-container-7478-389 oxy-container al-hero\"><div class=\"oxy-container-7478-388 oxy-container al-inner\"><div class=\"oxy-container-7478-387 oxy-container al-hero-grid\"><div class=\"oxy-container-7478-385 oxy-container al-hero-copy\"><span class=\"oxy-text-7478-379 oxy-text al-kicker\">\n\u041b\u0438\u0442\u044c\u0435 \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f\n<\/span><h1 class=\"oxy-text-7478-380 oxy-text\">\nAluminum castings, poured in the foundry that prints the moulds\n<\/h1><p class=\"oxy-text-7478-381 oxy-text al-lede\">\nAluminum is the metal we pour most. Ten thousand tonnes a year across our own foundries, in gravity, low-pressure, differential-pressure and liquid-squeeze routes, heat treated to T5 or T6, machined and inspected before it ships. Send a drawing and we will tell you which route holds your tolerance at the lowest cost.\n<\/p><div class=\"oxy-container-7478-384 oxy-container al-btns\"><a class=\"oxy-text-link-7478-382 oxy-text-link al-btn\" href=\"\/ru\/get-a-quote\/\" target=\"_self\">\nSend your drawing for a quote\n<\/a><a class=\"oxy-text-link-7478-383 oxy-text-link al-btn-ghost\" href=\"#al-alloys\" target=\"_self\">\nSee alloys and heat treatment\n<\/a><\/div><\/div><div class=\"oxy-container-7478-386 oxy-container al-hero-media\"><\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-396 oxy-container al-stat-strip\"><div class=\"oxy-container-7478-395 oxy-container al-inner\"><div class=\"oxy-container-7478-394 oxy-container al-stats\"><div class=\"oxy-text-7478-390 oxy-text al-stat\">\n<b>10,000 t+<\/b><span>aluminum capacity a year across our foundries<\/span>\n<\/div><div class=\"oxy-text-7478-391 oxy-text al-stat\">\n<b>1 t<\/b><span>maximum single casting weight<\/span>\n<\/div><div class=\"oxy-text-7478-392 oxy-text al-stat\">\n<b>5 m+<\/b><span>largest aluminum casting envelope<\/span>\n<\/div><div class=\"oxy-text-7478-393 oxy-text al-stat\">\n<b>CT8 to CT9<\/b><span>standard working tolerance, Ra 12.5 to 25<\/span>\n<\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-507 oxy-container al-sec--lead\"><div class=\"oxy-container-7478-506 oxy-container al-inner\"><p class=\"oxy-text-7478-505 oxy-text al-answer\">\nAluminum casting is the process of pouring molten aluminum into a mould formed in sand, plaster or steel, then letting it solidify into the shape of the part. We run six routes for it \u2014 gravity, low-pressure, differential-pressure, liquid squeeze, permanent mould and plaster-mould precision casting \u2014 across foundries that pour more than ten thousand tonnes of aluminum a year. If you just need to know which route suits your part, send the drawing and we will tell you.\n<\/p><\/div><\/section><section class=\"oxy-container-7478-427 oxy-container al-sec\"><div class=\"oxy-container-7478-426 oxy-container al-inner\"><nav class=\"oxy-container-7478-404 oxy-container al-pillrow\"><a class=\"oxy-text-link-7478-397 oxy-text-link\" href=\"#al-routes\" target=\"_self\">\nCasting routes\n<\/a><a class=\"oxy-text-link-7478-398 oxy-text-link\" href=\"#al-alloys\" target=\"_self\">\nAlloys\n<\/a><a class=\"oxy-text-link-7478-399 oxy-text-link\" href=\"#al-heat\" target=\"_self\">\nHeat treatment\n<\/a><a class=\"oxy-text-link-7478-400 oxy-text-link\" href=\"#al-limits\" target=\"_self\">\nTolerance\n<\/a><a class=\"oxy-text-link-7478-401 oxy-text-link\" href=\"#al-defects\" target=\"_self\">\nDefects\n<\/a><a class=\"oxy-text-link-7478-402 oxy-text-link\" href=\"#al-plant\" target=\"_self\">\nPlant\n<\/a><a class=\"oxy-text-link-7478-403 oxy-text-link\" href=\"#al-machines\" target=\"_self\">\nPrinters\n<\/a><\/nav><h2 class=\"oxy-text-7478-405 oxy-text\" id=\"al-routes\">\nSix ways we pour aluminum\n<\/h2><p class=\"oxy-text-7478-406 oxy-text al-prose\">\nAluminum is cast by more routes than any other metal we pour, because the choice between them is driven by wall thickness, section size and how much pressure the part has to hold. These are the six we run.\n<\/p><div class=\"oxy-container-7478-409 oxy-container al-def\"><h3 class=\"oxy-text-7478-407 oxy-text\">\nGravity casting\n<\/h3><p class=\"oxy-text-7478-408 oxy-text\">\nMetal poured under its own weight into a sand or metal mould. The cheapest route and the most forgiving, which is why it carries most structural aluminum housings, covers and brackets. Wall sections of 8 mm and up, CT8 to CT12 as cast.\n<\/p><\/div><div class=\"oxy-container-7478-412 oxy-container al-def\"><h3 class=\"oxy-text-7478-410 oxy-text\">\nLow-pressure casting\n<\/h3><p class=\"oxy-text-7478-411 oxy-text\">\nMetal pushed up a riser tube by gas pressure, so the cavity fills from the bottom with far less turbulence than gravity. That is what makes it the standard for leak-tight parts: pump bodies, valve bodies, motor housings and compressor casings. Our low-pressure machines run a piece every two minutes.\n<\/p><\/div><div class=\"oxy-container-7478-415 oxy-container al-def\"><h3 class=\"oxy-text-7478-413 oxy-text\">\nDifferential-pressure casting\n<\/h3><p class=\"oxy-text-7478-414 oxy-text\">\nControlled pressure on both sides of the mould, used for the thinnest and most demanding aluminum work. It is slower and more expensive than low pressure, so it is reserved for parts where nothing else holds the wall.\n<\/p><\/div><div class=\"oxy-container-7478-418 oxy-container al-def\"><h3 class=\"oxy-text-7478-416 oxy-text\">\nLiquid squeeze casting\n<\/h3><p class=\"oxy-text-7478-417 oxy-text\">\nMetal poured into an open die and squeezed while it solidifies. The pressure removes the shrinkage porosity that would otherwise sit in a heavy section, giving a denser part than any sand route. We run 30 kg squeeze machines.\n<\/p><\/div><div class=\"oxy-container-7478-421 oxy-container al-def\"><h3 class=\"oxy-text-7478-419 oxy-text\">\nPermanent mould casting\n<\/h3><p class=\"oxy-text-7478-420 oxy-text\">\nA machined steel mould instead of sand, in either gravity or low-pressure form. Better surface and tighter tolerance than sand, with a die cost that only pays off above a certain volume. We will tell you where that volume sits for your part.\n<\/p><\/div><div class=\"oxy-container-7478-424 oxy-container al-def\"><h3 class=\"oxy-text-7478-422 oxy-text\">\nPlaster-mould precision casting\n<\/h3><p class=\"oxy-text-7478-423 oxy-text\">\nGypsum plaster moulds for fine detail and thin walls that sand cannot reproduce. Used where a part needs investment-casting surface quality but is too large or too few for a wax route.\n<\/p><\/div><p class=\"oxy-text-7478-425 oxy-text al-prose\">\nEvery one of those routes is fed by moulds and cores we can print, which is what removes the pattern from the schedule: <a href=\"\/ru\/services\/sand-casting\/\">how sand casting works here<\/a>, \u0438 <a href=\"\/ru\/services\/sand-mold-sand-core-3d-printing\/\">printed moulds and cores in detail<\/a>.\n<\/p><\/div><\/section><section class=\"oxy-container-7478-432 oxy-container al-sec\"><div class=\"oxy-container-7478-431 oxy-container al-inner\"><h2 class=\"oxy-text-7478-428 oxy-text\" id=\"al-alloys\">\nAlloys we cast\n<\/h2><p class=\"oxy-text-7478-429 oxy-text al-prose\">\nNinety percent of the aluminum we pour falls into four families. They are not interchangeable: the silicon content decides how well the metal fills a thin section, and the magnesium and copper decide what heat treatment can do afterwards. International designation comes first, with the Chinese grade alongside, so the specification reads the same on both sides of the border.\n<\/p><div class=\"oxy-text-7478-430 oxy-text al-table-slot\">\n<div class=\"al-table-full\"><table class=\"al-ledger\"><thead><tr><th>Designation<\/th><th>Chinese grade<\/th><th>What it is for<\/th><th>Temper<\/th><\/tr><\/thead><tbody><tr><th>A356 \/ AlSi7Mg<\/th><td>ZL101A<\/td><td>The general-purpose casting alloy. Good fluidity, weldable, responds strongly to T6. Covers most pump, valve, housing and bracket work.<\/td><td>F, T5, T6<\/td><\/tr><tr><th>A360 \/ AlSi10Mg<\/th><td>ZL104A<\/td><td>Higher silicon, better thin-wall filling and casting soundness. Used for complex housings and covers where the metal has to reach a long way.<\/td><td>F, T6<\/td><\/tr><tr><th>ZL114A<\/th><td>ZL114A<\/td><td>Higher-strength variant of the A356 family, specified where the part carries real load rather than only holding geometry.<\/td><td>T5, T6<\/td><\/tr><tr><th>T6061 wrought<\/th><td>6061<\/td><td>Not a casting alloy, but we machine and assemble to it where a part mixes cast and wrought sections.<\/td><td>T6<\/td><\/tr><tr><th>A380 \/ ADC12 family<\/th><td>YZAlSi11Cu3<\/td><td>Copper-bearing high-pressure die-casting alloy. Available for permanent-mould work; we do not run high-pressure die casting.<\/td><td>F<\/td><\/tr><\/tbody><\/table><\/div>\n<\/div><\/div><\/section><section class=\"oxy-container-7478-443 oxy-container al-seq\" id=\"al-heat\"><div class=\"oxy-container-7478-442 oxy-container al-inner\"><span class=\"oxy-text-7478-433 oxy-text al-kicker\">\nHeat treatment\n<\/span><h2 class=\"oxy-text-7478-434 oxy-text\">\nWhy T6 is usually the difference between a casting and a part\n<\/h2><p class=\"oxy-text-7478-435 oxy-text al-prose\">\nAs-cast aluminum is soft. Heat treatment is what turns it into something a design engineer can specify with confidence \u2014 and getting it wrong is invisible until the part is loaded in service.\n<\/p><div class=\"oxy-container-7478-440 oxy-container al-seq-row\"><div class=\"oxy-text-7478-436 oxy-text al-seq-item\">\n<b>F<\/b><span>As cast. No thermal treatment. Used where strength is not the driver and cost is.<\/span>\n<\/div><div class=\"oxy-text-7478-437 oxy-text al-seq-item\">\n<b>T5<\/b><span>Cooled from the mould and artificially aged. A modest strength gain with no solution treatment, so less distortion risk on large thin parts.<\/span>\n<\/div><div class=\"oxy-text-7478-438 oxy-text al-seq-item\">\n<b>T6<\/b><span>Solution treated, quenched, then artificially aged. The highest strength we routinely deliver, and the treatment our EV motor housing and GIS housing work is specified to.<\/span>\n<\/div><div class=\"oxy-text-7478-439 oxy-text al-seq-item\">\n<b>T7<\/b><span>Over-aged for dimensional stability where the part will run hot or must not move after machining.<\/span>\n<\/div><\/div><p class=\"oxy-text-7478-441 oxy-text al-prose\">\nHeat treatment runs in the same chain as the casting, in a 2 m diameter furnace, alongside a 25 t heat-treatment and ageing furnace. That matters because quench delay is a process variable, not a shipping decision: the part does not leave the site between pouring and ageing.\n<\/p><\/div><\/section><section class=\"oxy-container-7478-450 oxy-container al-sec\"><div class=\"oxy-container-7478-449 oxy-container al-inner\"><h2 class=\"oxy-text-7478-444 oxy-text\" id=\"al-limits\">\nTolerance, finish and wall thickness\n<\/h2><p class=\"oxy-text-7478-445 oxy-text al-prose\">\nCasting drawings for aluminum are usually specified to a dimensional tolerance grade from GB\/T 6414, the Chinese adoption of ISO 8062-3. Lower numbers are tighter.\n<\/p><div class=\"oxy-text-7478-446 oxy-text al-table-slot\">\n<div class=\"al-table-full\"><table class=\"al-ledger\"><thead><tr><th>Route or feature<\/th><th>As-cast tolerance grade<\/th><th>Surface roughness, as cast<\/th><\/tr><\/thead><tbody><tr><th>Low-pressure and gravity, no-bake sand<\/th><td>DCTG 8 to 12<\/td><td>Ra 12.5 to 25<\/td><\/tr><tr><th>Permanent mould, gravity or low pressure<\/th><td>DCTG 7 to 9<\/td><td>Ra 6.3 to 12.5<\/td><\/tr><tr><th>Plaster-mould precision casting<\/th><td>DCTG 5 to 8<\/td><td>Ra 3.2 to 6.3<\/td><\/tr><tr><th>Our standard working range<\/th><td>CT8 to CT9<\/td><td>Ra 3.2 to 12.5<\/td><\/tr><tr><th>Minimum wall thickness<\/th><td>4 mm small section<\/td><td>10 to 15 mm safer over a large one<\/td><\/tr><\/tbody><\/table><\/div>\n<\/div><p class=\"oxy-text-7478-447 oxy-text al-prose\">\nTwo caveats that decide real projects. First, thin walls and tight tolerance pull against each other: the thinner the section, the faster it freezes, and the more the as-cast grade drifts. Second, wall thickness is a filling question before it is a strength question \u2014 at 4 mm the metal has to reach the far end of the cavity before it solidifies.\n<\/p><p class=\"oxy-text-7478-448 oxy-text al-prose\">\nWhere a feature genuinely needs better than CT8, the economical answer is almost always to machine that feature and leave the rest as cast. Chasing a tighter as-cast grade across a whole part costs more than the machining would have.\n<\/p><\/div><\/section><section class=\"oxy-container-7478-455 oxy-container al-sec\"><div class=\"oxy-container-7478-454 oxy-container al-inner\"><h2 class=\"oxy-text-7478-451 oxy-text\" id=\"al-defects\">\nDefects we prevent\n<\/h2><p class=\"oxy-text-7478-452 oxy-text al-prose\">\nAluminum oxidises faster than steel and absorbs hydrogen when it is molten, which is why its defects look different from a steel foundry's. These are the ones we design against.\n<\/p><div class=\"oxy-text-7478-453 oxy-text al-table-slot\">\n<div class=\"al-table-full\"><table class=\"al-ledger\"><thead><tr><th>Defect<\/th><th>What causes it in aluminum<\/th><th>What we do<\/th><\/tr><\/thead><tbody><tr><th>Gas porosity<\/th><td>Hydrogen absorbed by the melt and released as it freezes, worse in humid conditions and with wet charge material.<\/td><td>Degassing plus a vacuum hydrogen meter reading before the pour, not a visual check after it.<\/td><\/tr><tr><th>Shrinkage porosity<\/th><td>Heavy sections freezing last with no feed path. Aluminum shrinks about twice as much as steel, so it is less forgiving.<\/td><td>Feed calculation per section, chills on thermal nodes, or liquid-squeeze casting where the section is genuinely heavy.<\/td><\/tr><tr><th>Oxide inclusions<\/th><td>Aluminum oxide films folded into the metal by turbulence during filling.<\/td><td>Bottom-fill gating on low-pressure work, filtered runners, and a controlled pour rate rather than a fast one.<\/td><\/tr><tr><th>Hot tears<\/th><td>Restraint during contraction, made worse by sharp internal corners and by mould strength that is too high.<\/td><td>Radiused corners, controlled mould hardness, and alloy chemistry verified per heat.<\/td><\/tr><tr><th>Leak paths<\/th><td>Interconnected porosity that only reveals itself under a pressure test.<\/td><td>Low-pressure or squeeze routes for leak-tight parts, plus pressure testing before the part ships.<\/td><\/tr><tr><th>Dimensional drift after machining<\/th><td>Residual stress releasing when metal is removed, or the wrong temper for the service temperature.<\/td><td>T7 over-ageing where stability matters more than peak strength, and stress relief before final machining.<\/td><\/tr><\/tbody><\/table><\/div>\n<\/div><\/div><\/section><section class=\"oxy-container-7478-480 oxy-container al-sec\" id=\"al-plant\"><div class=\"oxy-container-7478-479 oxy-container al-inner\"><h2 class=\"oxy-text-7478-456 oxy-text\">\nOur aluminum foundry: where your casting is poured\n<\/h2><p class=\"oxy-text-7478-457 oxy-text al-prose\">\nThis is an aluminum foundry first, not a sideline added to a steel plant. Our two largest bases are aluminum plants, and between them they carry the bulk of the ten thousand tonnes. Melting is the constraint that gets overlooked: a 1 t tiltable furnace feeding low-pressure machines, which is why transfer time and pouring temperature are controlled rather than assumed.\n<\/p><div class=\"oxy-container-7478-478 oxy-container al-plants\"><div class=\"oxy-container-7478-461 oxy-container al-plant\"><h3 class=\"oxy-text-7478-458 oxy-text\">\nHebei Daming\n<\/h3><span class=\"oxy-text-7478-459 oxy-text al-plant-cap\">\n20,000 t \/ year\n<\/span><p class=\"oxy-text-7478-460 oxy-text\">\nAluminum castings for industrial machinery and general engineering, from liquid squeeze through to gravity. Our largest aluminum base, with a 5 m+ envelope.\n<\/p><\/div><div class=\"oxy-container-7478-465 oxy-container al-plant\"><h3 class=\"oxy-text-7478-462 oxy-text\">\nHenan Pingdingshan\n<\/h3><span class=\"oxy-text-7478-463 oxy-text al-plant-cap\">\n5,000 t \/ year\n<\/span><p class=\"oxy-text-7478-464 oxy-text\">\nHigh-voltage cast-aluminum enclosures for the transmission industry, plus large thin-wall housing work. Sole China supplier of GIS housings to two Korean majors.\n<\/p><\/div><div class=\"oxy-container-7478-469 oxy-container al-plant\"><h3 class=\"oxy-text-7478-466 oxy-text\">\nShaanxi Xianyang\n<\/h3><span class=\"oxy-text-7478-467 oxy-text al-plant-cap\">\n1,800 t \/ year\n<\/span><p class=\"oxy-text-7478-468 oxy-text\">\nAluminum, copper and steel, with 50+ casting and machining units and the metallurgical laboratory on site.\n<\/p><\/div><div class=\"oxy-container-7478-473 oxy-container al-plant\"><h3 class=\"oxy-text-7478-470 oxy-text\">\nGuangxi Yulin\n<\/h3><span class=\"oxy-text-7478-471 oxy-text al-plant-cap\">\n2 million parts \/ year\n<\/span><p class=\"oxy-text-7478-472 oxy-text\">\nHigh-volume aluminum components serving South China and the ASEAN market.\n<\/p><\/div><div class=\"oxy-container-7478-477 oxy-container al-plant\"><h3 class=\"oxy-text-7478-474 oxy-text\">\nShandong Rizhao\n<\/h3><span class=\"oxy-text-7478-475 oxy-text al-plant-cap\">\nmulti-line\n<\/span><p class=\"oxy-text-7478-476 oxy-text\">\nAutomotive aluminum and mixed-metal work, with SLM, 3DP and CNC machining on the same site.\n<\/p><\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-542 oxy-container al-sec\"><div class=\"oxy-container-7478-541 oxy-container al-inner\"><h2 class=\"oxy-text-7478-508 oxy-text\">\nThe printers that make the moulds\n<\/h2><p class=\"oxy-text-7478-509 oxy-text al-prose\">\nTwo models cover most of our aluminum mould and core work. Both are binder-jetting machines running silica or ceramic sand with furan or phenolic resin, and both are ours \u2014 we build them rather than buy them.\n<\/p><div class=\"oxy-container-7478-540 oxy-container al-cards\"><div class=\"oxy-container-7478-524 oxy-container al-card\"><div class=\"oxy-container-7478-510 oxy-container al-card-media\"><\/div><div class=\"oxy-container-7478-523 oxy-container al-card-body\"><h3 class=\"oxy-text-7478-511 oxy-text\">\n3DPTEK-J1800\n<\/h3><p class=\"oxy-text-7478-512 oxy-text al-card-sub\">\nThe workhorse for small and medium aluminum moulds, cores and one-off patterns.\n<\/p><dl class=\"oxy-container-7478-521 oxy-container\"><dt class=\"oxy-text-7478-513 oxy-text\">\nBuild size\n<\/dt><dd class=\"oxy-text-7478-514 oxy-text\">\n1800 x 1000 x 700 mm\n<\/dd><dt class=\"oxy-text-7478-515 oxy-text\">\n\u041f\u0435\u0447\u0430\u0442\u0430\u044e\u0449\u0438\u0435 \u0433\u043e\u043b\u043e\u0432\u043a\u0438\n<\/dt><dd class=\"oxy-text-7478-516 oxy-text\">\n8\n<\/dd><dt class=\"oxy-text-7478-517 oxy-text\">\nBuild rate\n<\/dt><dd class=\"oxy-text-7478-518 oxy-text\">\n18 to 23 s \/ layer\n<\/dd><dt class=\"oxy-text-7478-519 oxy-text\">\n\u0422\u043e\u0447\u043d\u043e\u0441\u0442\u044c\n<\/dt><dd class=\"oxy-text-7478-520 oxy-text\">\n\u00b10,3 \u043c\u043c\n<\/dd><\/dl><a class=\"oxy-text-link-7478-522 oxy-text-link al-card-link\" href=\"\/ru\/3d-printers\/sand-3d-printers\/3dptek-j1800\/\" target=\"_self\">\nFull specifications and case work \u2192\n<\/a><\/div><\/div><div class=\"oxy-container-7478-539 oxy-container al-card\"><div class=\"oxy-container-7478-525 oxy-container al-card-media\"><\/div><div class=\"oxy-container-7478-538 oxy-container al-card-body\"><h3 class=\"oxy-text-7478-526 oxy-text\">\n3DPTEK-J2500\n<\/h3><p class=\"oxy-text-7478-527 oxy-text al-card-sub\">\nFor large single moulds and multi-part cores printed in one build.\n<\/p><dl class=\"oxy-container-7478-536 oxy-container\"><dt class=\"oxy-text-7478-528 oxy-text\">\nBuild size\n<\/dt><dd class=\"oxy-text-7478-529 oxy-text\">\n2500 x 1500 x 1000 mm\n<\/dd><dt class=\"oxy-text-7478-530 oxy-text\">\n\u041f\u0435\u0447\u0430\u0442\u0430\u044e\u0449\u0438\u0435 \u0433\u043e\u043b\u043e\u0432\u043a\u0438\n<\/dt><dd class=\"oxy-text-7478-531 oxy-text\">\n12\n<\/dd><dt class=\"oxy-text-7478-532 oxy-text\">\nBuild rate\n<\/dt><dd class=\"oxy-text-7478-533 oxy-text\">\n16 to 20 s \/ layer\n<\/dd><dt class=\"oxy-text-7478-534 oxy-text\">\n\u0422\u043e\u0447\u043d\u043e\u0441\u0442\u044c\n<\/dt><dd class=\"oxy-text-7478-535 oxy-text\">\n\u00b10,3 \u043c\u043c\n<\/dd><\/dl><a class=\"oxy-text-link-7478-537 oxy-text-link al-card-link\" href=\"\/ru\/3d-printers\/sand-3d-printers\/\" target=\"_self\">\nSee the sand printer range \u2192\n<\/a><\/div><\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-559 oxy-container al-sec\"><div class=\"oxy-container-7478-558 oxy-container al-inner\"><h2 class=\"oxy-text-7478-543 oxy-text\">\nWhere aluminum pays off\n<\/h2><p class=\"oxy-text-7478-544 oxy-text al-prose\">\nAluminum gets specified for two reasons: weight, or thermal and electrical behaviour. Both show up in the same handful of industries, and each one asks something different of the casting.\n<\/p><div class=\"oxy-container-7478-557 oxy-container al-apps\"><div class=\"oxy-container-7478-547 oxy-container al-app\"><h3 class=\"oxy-text-7478-545 oxy-text\">\nNew energy and EV\n<\/h3><p class=\"oxy-text-7478-546 oxy-text\">\nMotor housings, battery enclosures and inverter casings, where a water jacket has to be cast as a sealed channel and the part has to be light. Low-pressure plus T6 is the usual route.\n<\/p><\/div><div class=\"oxy-container-7478-550 oxy-container al-app\"><h3 class=\"oxy-text-7478-548 oxy-text\">\nHigh-voltage transmission\n<\/h3><p class=\"oxy-text-7478-549 oxy-text\">\nGIS and switchgear enclosures, cast in aluminum for conductivity and pressure-tightness. Wall thickness and leak rate decide the process, not the alloy.\n<\/p><\/div><div class=\"oxy-container-7478-553 oxy-container al-app\"><h3 class=\"oxy-text-7478-551 oxy-text\">\nPumps, valves and marine\n<\/h3><p class=\"oxy-text-7478-552 oxy-text\">\nBodies and impellers that must not leak and must resist corrosion. Low-pressure and squeeze routes, pressure tested before dispatch.\n<\/p><\/div><div class=\"oxy-container-7478-556 oxy-container al-app\"><h3 class=\"oxy-text-7478-554 oxy-text\">\nAutomotive and industrial\n<\/h3><p class=\"oxy-text-7478-555 oxy-text\">\nEngine blocks, gearbox cases, brackets and cylinder heads \u2014 the volume end of the business, where pattern amortisation decides between printed and permanent tooling.\n<\/p><\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-687 oxy-container al-sec\"><div class=\"oxy-container-7478-686 oxy-container al-inner\"><h2 class=\"oxy-text-7478-665 oxy-text\">\nAluminum castings we have poured\n<\/h2><p class=\"oxy-text-7478-666 oxy-text al-prose\">\nA sample of recent aluminum work. Every one of these started as a CAD file and a printed mould or core, and the ones that hold pressure were leak tested before they left the foundry.\n<\/p><div class=\"oxy-container-7478-685 oxy-container al-gallery\"><figure class=\"oxy-container-7478-669 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-667 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/08\/GIS-housing.jpg\" alt=\"GIS enclosure casting in aluminum for high-voltage transmission equipment\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-668 oxy-text\">\nGIS enclosure<span>High-voltage transmission, low-pressure, T6<\/span>\n<\/figcaption><\/figure><figure class=\"oxy-container-7478-672 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-670 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/08\/Water-Cooled-Motor-Housing.jpg\" alt=\"Water-cooled aluminum motor housing for a new-energy vehicle\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-671 oxy-text\">\nWater-cooled motor housing<span>New-energy vehicle, sealed water jacket<\/span>\n<\/figcaption><\/figure><figure class=\"oxy-container-7478-675 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-673 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2024\/09\/K16-water-cooled-housing-casting-part.jpg\" alt=\"K16 water-cooled aluminum housing after machining and pressure testing\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-674 oxy-text\">\nK16 water-cooled housing<span>Machined and pressure tested<\/span>\n<\/figcaption><\/figure><figure class=\"oxy-container-7478-678 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-676 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/04\/Aluminum-alloy-castings.jpg\" alt=\"Aluminum alloy castings produced from printed sand moulds\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-677 oxy-text\">\nAluminum alloy castings<span>Printed moulds, no pattern cost<\/span>\n<\/figcaption><\/figure><figure class=\"oxy-container-7478-681 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-679 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/03\/ZL101-Aluminum-Alloy-Engine-Block.jpg\" alt=\"ZL101 aluminum alloy engine block casting\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-680 oxy-text\">\nZL101 engine block<span>Automotive, high-volume route<\/span>\n<\/figcaption><\/figure><figure class=\"oxy-container-7478-684 oxy-container al-shot\"><img decoding=\"async\" class=\"oxy-image-7478-682 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/08\/GIS-Corona-Shield.jpg\" alt=\"Thin-wall aluminum corona shield cast in a plaster mould\" loading=\"lazy\"><figcaption class=\"oxy-text-7478-683 oxy-text\">\nGIS corona shield<span>Thin-wall, plaster-mould precision<\/span>\n<\/figcaption><\/figure><\/div><\/div><\/section><section class=\"oxy-container-7478-589 oxy-container al-sec\"><div class=\"oxy-container-7478-588 oxy-container al-inner\"><h2 class=\"oxy-text-7478-560 oxy-text\">\nSand casting or investment casting for your part?\n<\/h2><p class=\"oxy-text-7478-561 oxy-text al-prose\">\nBoth routes start from a printed pattern or mould, so the choice is not about tooling. It comes down to how fine the detail is and how many parts you need.\n<\/p><div class=\"oxy-container-7478-586 oxy-container al-routes2\"><div class=\"oxy-container-7478-573 oxy-container al-route2\"><h3 class=\"oxy-text-7478-562 oxy-text\">\nSand casting\n<\/h3><ul class=\"oxy-container-7478-571 oxy-container\"><li class=\"oxy-container-7478-564 oxy-container\"><div class=\"oxy-text-7478-563 oxy-text\">\nLarger parts, thicker sections, structural geometry\n<\/div><\/li><li class=\"oxy-container-7478-566 oxy-container\"><div class=\"oxy-text-7478-565 oxy-text\">\nCT8 to CT12 as cast, Ra 12.5 to 25\n<\/div><\/li><li class=\"oxy-container-7478-568 oxy-container\"><div class=\"oxy-text-7478-567 oxy-text\">\nLowest cost per part from one piece upward\n<\/div><\/li><li class=\"oxy-container-7478-570 oxy-container\"><div class=\"oxy-text-7478-569 oxy-text\">\nEnvelope to 5 m in aluminum\n<\/div><\/li><\/ul><a class=\"oxy-text-link-7478-572 oxy-text-link\" href=\"\/ru\/services\/sand-casting\/\" target=\"_self\">\nHow sand casting works here \u2192\n<\/a><\/div><div class=\"oxy-container-7478-585 oxy-container al-route2\"><h3 class=\"oxy-text-7478-574 oxy-text\">\nInvestment casting\n<\/h3><ul class=\"oxy-container-7478-583 oxy-container\"><li class=\"oxy-container-7478-576 oxy-container\"><div class=\"oxy-text-7478-575 oxy-text\">\nThin walls, fine detail, complex internal passages\n<\/div><\/li><li class=\"oxy-container-7478-578 oxy-container\"><div class=\"oxy-text-7478-577 oxy-text\">\nDCTG 4 to 9, Ra 3.2 to 12.5\n<\/div><\/li><li class=\"oxy-container-7478-580 oxy-container\"><div class=\"oxy-text-7478-579 oxy-text\">\nBetter surface, so less machining allowance\n<\/div><\/li><li class=\"oxy-container-7478-582 oxy-container\"><div class=\"oxy-text-7478-581 oxy-text\">\nBest economics on smaller, higher-value parts\n<\/div><\/li><\/ul><a class=\"oxy-text-link-7478-584 oxy-text-link\" href=\"\/ru\/services\/precision-casting\/\" target=\"_self\">\nPrecision investment casting \u2192\n<\/a><\/div><\/div><p class=\"oxy-text-7478-587 oxy-text al-prose\">\nWe run both, so the recommendation is not a sales preference. If your part sits between them, we will quote both and tell you which one we would put it on.\n<\/p><\/div><\/section><section class=\"oxy-container-7478-602 oxy-container al-sec\"><div class=\"oxy-container-7478-601 oxy-container al-inner\"><h2 class=\"oxy-text-7478-590 oxy-text\">\nWelding, machining and leak-tightness\n<\/h2><p class=\"oxy-text-7478-591 oxy-text al-prose\">\nThree things decide whether an aluminum casting becomes a usable part, and all three are easier to design in than to fix afterwards.\n<\/p><div class=\"oxy-container-7478-594 oxy-container al-def\"><h3 class=\"oxy-text-7478-592 oxy-text\">\nLeak-tightness\n<\/h3><p class=\"oxy-text-7478-593 oxy-text\">\nAluminum castings are frequently specified to hold pressure \u2014 a water jacket, a hydraulic body, a gas enclosure. Interconnected porosity is what defeats them, so leak-critical parts go on low-pressure or squeeze routes rather than gravity, and are pressure tested before they ship rather than after they are assembled.\n<\/p><\/div><div class=\"oxy-container-7478-597 oxy-container al-def\"><h3 class=\"oxy-text-7478-595 oxy-text\">\nMachining\n<\/h3><p class=\"oxy-text-7478-596 oxy-text\">\nAluminum cuts fast, which tempts people into leaving minimal allowance. That is the wrong trade: an aluminum casting moves slightly as internal stress releases, so the allowance has to cover both the as-cast tolerance and the movement. We agree the allowance at quotation, per face.\n<\/p><\/div><div class=\"oxy-container-7478-600 oxy-container al-def\"><h3 class=\"oxy-text-7478-598 oxy-text\">\nWelding and assembly\n<\/h3><p class=\"oxy-text-7478-599 oxy-text\">\nMost aluminum casting alloys weld acceptably, but heat-treatable grades lose strength in the heat-affected zone and recover only partly. Where a casting will be welded into an assembly, we pick the temper with that in mind rather than defaulting to T6.\n<\/p><\/div><\/div><\/section><section class=\"oxy-container-7478-704 oxy-container al-sec\"><div class=\"oxy-container-7478-703 oxy-container al-inner\"><h2 class=\"oxy-text-7478-688 oxy-text\">\nChoosing the process for your part\n<\/h2><p class=\"oxy-text-7478-689 oxy-text al-prose\">\nThree questions settle it in most cases, and none of them require you to know the process names first.\n<\/p><div class=\"oxy-container-7478-702 oxy-container al-choose\"><div class=\"oxy-container-7478-693 oxy-container al-choose-card\"><span class=\"oxy-text-7478-690 oxy-text al-choose-num\">\n01\n<\/span><h3 class=\"oxy-text-7478-691 oxy-text\">\nHow many parts, and will the design change?\n<\/h3><p class=\"oxy-text-7478-692 oxy-text\">\nOne to a few hundred, or anything still being iterated \u2014 printed moulds, and no pattern cost to write off when the drawing changes. Thousands with a frozen design \u2014 a permanent mould, because the die amortises.\n<\/p><\/div><div class=\"oxy-container-7478-697 oxy-container al-choose-card\"><span class=\"oxy-text-7478-694 oxy-text al-choose-num\">\n02\n<\/span><h3 class=\"oxy-text-7478-695 oxy-text\">\nDoes it have to hold pressure or stay leak-tight?\n<\/h3><p class=\"oxy-text-7478-696 oxy-text\">\nIf yes, low-pressure casting or liquid squeeze, not gravity. This is the single most common reason a first article fails a pressure test, and it is decided by the route before any alloy is chosen.\n<\/p><\/div><div class=\"oxy-container-7478-701 oxy-container al-choose-card\"><span class=\"oxy-text-7478-698 oxy-text al-choose-num\">\n03\n<\/span><h3 class=\"oxy-text-7478-699 oxy-text\">\nHow fine is the detail?\n<\/h3><p class=\"oxy-text-7478-700 oxy-text\">\nRa 25 and CT12 is fine for most housings. If the part needs thin walls or fine internal passages, it probably belongs on an investment route instead \u2014 see the comparison above.\n<\/p><\/div><\/div><h3 class=\"oxy-text-7478-733 oxy-text lyafs-h3\">\nRelated casting routes\n<\/h3><ul class=\"oxy-container-7478-749 oxy-container lyafs-links\"><li class=\"oxy-container-7478-736 oxy-container\"><a class=\"oxy-text-link-7478-734 oxy-text-link lyafs-route\" href=\"\/ru\/services\/low-pressure-casting\/\" target=\"_self\">\nLow pressure casting\n<\/a><p class=\"oxy-text-7478-735 oxy-text lyafs-route-desc\">\nFilled from below and held under pressure \u2014 the route for gas-tight aluminium housings.\n<\/p><\/li><li class=\"oxy-container-7478-739 oxy-container\"><a class=\"oxy-text-link-7478-737 oxy-text-link lyafs-route\" href=\"\/ru\/services\/gravity-casting\/\" target=\"_self\">\nGravity casting\n<\/a><p class=\"oxy-text-7478-738 oxy-text lyafs-route-desc\">\nAluminium and copper poured by gravity into a printed mould, to a 5 m envelope.\n<\/p><\/li><li class=\"oxy-container-7478-742 oxy-container\"><a class=\"oxy-text-link-7478-740 oxy-text-link lyafs-route\" href=\"\/ru\/services\/ductile-iron-casting\/\" target=\"_self\">\nDuctile iron casting\n<\/a><p class=\"oxy-text-7478-741 oxy-text lyafs-route-desc\">\nWhen the part needs iron rather than aluminium: QT400 to QT700.\n<\/p><\/li><li class=\"oxy-container-7478-745 oxy-container\"><a class=\"oxy-text-link-7478-743 oxy-text-link lyafs-route\" href=\"\/ru\/services\/cast-steel-casting\/\" target=\"_self\">\nCast steel casting\n<\/a><p class=\"oxy-text-7478-744 oxy-text lyafs-route-desc\">\nCarbon, low-alloy and stainless steel by the sand or wax route.\n<\/p><\/li><li class=\"oxy-container-7478-748 oxy-container\"><a class=\"oxy-text-link-7478-746 oxy-text-link lyafs-route\" href=\"\/ru\/services\/bronze-casting\/\" target=\"_self\">\nBronze and brass casting\n<\/a><p class=\"oxy-text-7478-747 oxy-text lyafs-route-desc\">\nCopper alloys for bearing, marine and architectural duty.\n<\/p><\/li><\/ul><\/div><\/section><section class=\"oxy-container-7478-732 oxy-container al-sec\"><div class=\"oxy-container-7478-731 oxy-container al-inner\"><h2 class=\"oxy-text-7478-705 oxy-text\">\nQuestions we get before a first aluminum order\n<\/h2><div class=\"oxy-container-7478-730 oxy-container al-faq\"><div class=\"oxy-container-7478-708 oxy-container al-qa\"><h3 class=\"oxy-text-7478-706 oxy-text\">\nWhat aluminum alloys do you cast?\n<\/h3><p class=\"oxy-text-7478-707 oxy-text\">\nMainly the A356 and A360 families, which we know as ZL101A, ZL104A and ZL114A, plus 6061 where a part mixes cast and wrought sections. A356 responds strongly to T6 and covers most pump, valve and housing work.\n<\/p><\/div><div class=\"oxy-container-7478-711 oxy-container al-qa\"><h3 class=\"oxy-text-7478-709 oxy-text\">\nWhat is the maximum size and weight?\n<\/h3><p class=\"oxy-text-7478-710 oxy-text\">\nUp to 1 t for a single casting, and an envelope to 5 m in aluminum. Beyond that the part has to be split or the process changed, and we will say which.\n<\/p><\/div><div class=\"oxy-container-7478-714 oxy-container al-qa\"><h3 class=\"oxy-text-7478-712 oxy-text\">\nWhat tolerance can you hold as cast?\n<\/h3><p class=\"oxy-text-7478-713 oxy-text\">\nCT8 to CT9 is our standard working range for aluminum, at Ra 12.5 to 25. Where a feature needs better than that, the economical answer is usually to machine the feature rather than tighten the whole casting.\n<\/p><\/div><div class=\"oxy-container-7478-717 oxy-container al-qa\"><h3 class=\"oxy-text-7478-715 oxy-text\">\nDo you heat treat in house?\n<\/h3><p class=\"oxy-text-7478-716 oxy-text\">\nYes. T5, T6 and T7 run in the same chain as the casting, in a 2 m diameter furnace plus a 25 t heat-treatment and ageing furnace. Quench delay is a process variable we control rather than a shipping decision.\n<\/p><\/div><div class=\"oxy-container-7478-720 oxy-container al-qa\"><h3 class=\"oxy-text-7478-718 oxy-text\">\nCan you machine and inspect before shipping?\n<\/h3><p class=\"oxy-text-7478-719 oxy-text\">\nYes. CNC machining, coordinate measuring to PEE 5.18 \u00b5m, X-ray, ultrasonic and spectrographic verification all happen before the part leaves, with records.\n<\/p><\/div><div class=\"oxy-container-7478-723 oxy-container al-qa\"><h3 class=\"oxy-text-7478-721 oxy-text\">\nWhat is the smallest batch?\n<\/h3><p class=\"oxy-text-7478-722 oxy-text\">\nOne piece. Printing the mould removes the pattern, which is what makes a single aluminum casting economic.\n<\/p><\/div><div class=\"oxy-container-7478-726 oxy-container al-qa\"><h3 class=\"oxy-text-7478-724 oxy-text\">\nHow fast is the first part?\n<\/h3><p class=\"oxy-text-7478-725 oxy-text\">\nPrinted-mould work runs from CAD to a poured and heat-treated aluminum casting in about 20 days on a small batch. Permanent-mould work adds the die lead time.\n<\/p><\/div><div class=\"oxy-container-7478-729 oxy-container al-qa\"><h3 class=\"oxy-text-7478-727 oxy-text\">\nDo you do high-pressure die casting?\n<\/h3><p class=\"oxy-text-7478-728 oxy-text\">\nNo. We run gravity, low-pressure, differential-pressure, liquid squeeze, permanent mould and plaster-mould precision casting. If your part is designed for high-pressure die casting, we are the wrong supplier and will tell you so.\n<\/p><\/div><\/div><\/div><\/section><section class=\"oxy-container-7478-504 oxy-container al-close\"><div class=\"oxy-container-7478-503 oxy-container al-inner\"><h2 class=\"oxy-text-7478-498 oxy-text\">\nSend the drawing, get a route and a price\n<\/h2><p class=\"oxy-text-7478-499 oxy-text\">\nSend a model and we will come back within 24 hours with the casting route we would run, the alloy and temper we would specify, the machining allowance we would leave, and a price. If aluminum is the wrong metal for the part, we will say so.\n<\/p><div class=\"oxy-container-7478-502 oxy-container al-btns\"><a class=\"oxy-text-link-7478-500 oxy-text-link al-btn\" href=\"\/ru\/get-a-quote\/\" target=\"_self\">\nSend your CAD for a quote\n<\/a><a class=\"oxy-text-link-7478-501 oxy-text-link al-btn-ghost\" href=\"\/ru\/contact\/\" target=\"_self\">\nTalk to a foundry engineer\n<\/a><\/div><\/div><\/section><\/main>","protected":false},"excerpt":{"rendered":"<p>Aluminum Casting Aluminum castings, poured in the foundry that prints the moulds Aluminum is the metal we pour most. Ten thousand tonnes a year across our own foundries, in gravity, low-pressure, differential-pressure and liquid-squeeze routes, heat treated to T5 or T6, machined and inspected before it ships. Send a drawing and we will tell you [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5302,"parent":70,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_oxygen_hide_in_design_set":false,"_oxygen_tags":"","footnotes":""},"class_list":["post-7478","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<title>Aluminum Casting | Aluminum Foundry, A356, T5\/T6 - 3DPTEK | AFS<\/title>\n<meta name=\"description\" content=\"Aluminum castings from our own aluminum foundry, in A356, A360 and ZL101A, heat treated to T5 or T6. 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