{"id":6964,"date":"2026-10-09T15:53:16","date_gmt":"2026-10-09T15:53:16","guid":{"rendered":"https:\/\/www.lyafs.com\/?page_id=6964"},"modified":"2026-10-16T07:58:59","modified_gmt":"2026-10-16T07:58:59","slug":"stainless-steel-casting","status":"publish","type":"page","link":"https:\/\/www.lyafs.com\/ja\/services\/stainless-steel-casting\/","title":{"rendered":"Stainless Steel Casting"},"content":{"rendered":"<main id='oxy-main'><section class=\"oxy-container-6964-517 oxy-container lyafs-hero lyafs-hero--flip\"><div class=\"oxy-container-6964-516 oxy-container lyafs-inner lyafs-hero-grid\"><div class=\"oxy-container-6964-513 oxy-container lyafs-hero-text\"><span class=\"oxy-text-6964-507 oxy-text lyafs-kicker\">\nStainless steel casting\n<\/span><h1 class=\"oxy-text-6964-508 oxy-text lyafs-h1\">\nStainless Steel Casting Without Tooling Cost\n<\/h1><p class=\"oxy-text-6964-509 oxy-text lyafs-lede\">\nA pattern is the most expensive and slowest part of any stainless steel casting project. We remove it. Printed sand moulds and printed wax patterns go straight from your CAD file to the foundry floor, so a design change costs nothing and the first part can be poured while a conventional shop is still quoting pattern work.\n<\/p><div class=\"oxy-container-6964-512 oxy-container lyafs-cta-row\"><a class=\"oxy-text-link-6964-510 oxy-text-link lyafs-btn\" href=\"\/ja\/get-a-quote\/\" target=\"_self\">\nSend your CAD for a quote\n<\/a><a class=\"oxy-text-link-6964-511 oxy-text-link lyafs-btn lyafs-btn--ghost\" href=\"#ss-grades\" target=\"_self\">\nSee grades and limits\n<\/a><\/div><\/div><div class=\"oxy-container-6964-515 oxy-container lyafs-hero-media\"><img decoding=\"async\" class=\"oxy-image-6964-514 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2025\/11\/3D-Printed-Sand-Casting-Finished-Parts.jpg\" alt=\"Finished cast part produced from a 3D printed sand mould\" loading=\"lazy\"><\/div><\/div><\/section><div class=\"oxy-container-6964-784 oxy-container lyafs-bleed\"><div class=\"oxy-container-6964-783 oxy-container lyafs-inner\"><ul class=\"oxy-container-6964-782 oxy-container lyafs-stats\"><li class=\"oxy-container-6964-775 oxy-container lyafs-stat\"><div class=\"oxy-text-6964-774 oxy-text\">\n<b>1 t<\/b><span>Maximum single cast weight<\/span>\n<\/div><\/li><li class=\"oxy-container-6964-777 oxy-container lyafs-stat\"><div class=\"oxy-text-6964-776 oxy-text\">\n<b>1.5 m<\/b><span>Maximum casting dimension<\/span>\n<\/div><\/li><li class=\"oxy-container-6964-779 oxy-container lyafs-stat\"><div class=\"oxy-text-6964-778 oxy-text\">\n<b>20\u65e5\u9593<\/b><span>Typical small-batch delivery<\/span>\n<\/div><\/li><li class=\"oxy-container-6964-781 oxy-container lyafs-stat\"><div class=\"oxy-text-6964-780 oxy-text\">\n<b>CT8 to CT9<\/b><span>Standard dimensional tolerance<\/span>\n<\/div><\/li><\/ul><\/div><\/div><section class=\"oxy-container-6964-573 oxy-container lyafs-sec lyafs-sec--alt\" id=\"ss-grades\"><div class=\"oxy-container-6964-572 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-531 oxy-container lyafs-head\"><span class=\"oxy-text-6964-529 oxy-text lyafs-rail\">\n01\n<\/span><h2 class=\"oxy-text-6964-530 oxy-text lyafs-h2\">\nStainless grades we cast\n<\/h2><\/div><p class=\"oxy-text-6964-532 oxy-text lyafs-sub\">\nStainless sits inside our cast steel line, which we run through shell casting and investment casting. The three grades below cover most enquiries; duplex and the high-temperature alloys come up in pumps, valves and process equipment.\n<\/p><ul class=\"oxy-container-6964-545 oxy-container lyafs-grid lyafs-grid--2\"><li class=\"oxy-container-6964-535 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-533 oxy-text lyafs-h3\">\n304 and 304L\n<\/h3><p class=\"oxy-text-6964-534 oxy-text lyafs-p\">\nThe general-purpose austenitic grade. Food and beverage equipment, architectural hardware, general industrial parts. Good weldability and dependable corrosion resistance across a wide temperature range.\n<\/p><\/li><li class=\"oxy-container-6964-538 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-536 oxy-text lyafs-h3\">\n316 and 316L\n<\/h3><p class=\"oxy-text-6964-537 oxy-text lyafs-p\">\nMolybdenum gives it resistance to pitting and crevice corrosion that 304 does not have. This is the grade for chlorides, saltwater, chemical process lines, pumps and valve bodies.\n<\/p><\/li><li class=\"oxy-container-6964-541 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-539 oxy-text lyafs-h3\">\n17-4PH\n<\/h3><p class=\"oxy-text-6964-540 oxy-text lyafs-p\">\nPrecipitation-hardening martensitic stainless. It reaches high strength and hardness after heat treatment, so it suits shafts, valve stems and fittings where 304 or 316 would be too soft.\n<\/p><\/li><li class=\"oxy-container-6964-544 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-542 oxy-text lyafs-h3\">\nDuplex and superalloys\n<\/h3><p class=\"oxy-text-6964-543 oxy-text lyafs-p\">\nDuplex stainless for chloride service where 316 stress-cracking is a risk. Beyond stainless, we cast nickel and cobalt superalloys, including Inconel 718 and Hastelloy, for high-temperature parts.\n<\/p><\/li><\/ul><div class=\"oxy-container-6964-570 oxy-container lyafs-table-wrap\"><table class=\"oxy-container-6964-569 oxy-container lyafs-table\"><caption class=\"oxy-text-6964-546 oxy-text\">\nWhat each grade gives you, and where it stops being the right answer.\n<\/caption><thead class=\"oxy-container-6964-551 oxy-container\"><tr class=\"oxy-container-6964-550 oxy-container\"><th class=\"oxy-text-6964-547 oxy-text\" scope=\"col\">\nGrade\n<\/th><th class=\"oxy-text-6964-548 oxy-text\" scope=\"col\">\nWhat it gives you\n<\/th><th class=\"oxy-text-6964-549 oxy-text\" scope=\"col\">\nWhere it breaks down\n<\/th><\/tr><\/thead><tbody class=\"oxy-container-6964-568 oxy-container\"><tr class=\"oxy-container-6964-555 oxy-container\"><th class=\"oxy-text-6964-552 oxy-text\" scope=\"row\">\n304 \/ 304L\n<\/th><td class=\"oxy-text-6964-553 oxy-text\">\nCheapest of the austenitic grades, easy to weld and form, good across a wide temperature range\n<\/td><td class=\"oxy-text-6964-554 oxy-text\">\nChlorides. It pits and crevice-corrodes in saltwater and chemical service\n<\/td><\/tr><tr class=\"oxy-container-6964-559 oxy-container\"><th class=\"oxy-text-6964-556 oxy-text\" scope=\"row\">\n316 \/ 316L\n<\/th><td class=\"oxy-text-6964-557 oxy-text\">\nMolybdenum resists pitting and crevice corrosion, so it holds up in chlorides and acids\n<\/td><td class=\"oxy-text-6964-558 oxy-text\">\nChloride stress corrosion cracking at elevated temperature and tensile load\n<\/td><\/tr><tr class=\"oxy-container-6964-563 oxy-container\"><th class=\"oxy-text-6964-560 oxy-text\" scope=\"row\">\n17-4PH\n<\/th><td class=\"oxy-text-6964-561 oxy-text\">\nHigh strength and hardness after precipitation hardening, with moderate corrosion resistance\n<\/td><td class=\"oxy-text-6964-562 oxy-text\">\nNot a substitute for 316 in aggressive chemical service; corrosion resistance is a step down\n<\/td><\/tr><tr class=\"oxy-container-6964-567 oxy-container\"><th class=\"oxy-text-6964-564 oxy-text\" scope=\"row\">\nDuplex\n<\/th><td class=\"oxy-text-6964-565 oxy-text\">\nRoughly double the yield strength of 316 plus resistance to chloride stress cracking\n<\/td><td class=\"oxy-text-6964-566 oxy-text\">\nHigher alloy cost, and welding needs tighter control than the austenitic grades\n<\/td><\/tr><\/tbody><\/table><\/div><p class=\"oxy-text-6964-571 oxy-text lyafs-p\">\nFor the underlying material data across sands, binders, metal powders and wax, see our <a href=\"\/ja\/resources\/materials-guide\/\">foundry materials guide<\/a>.\n<\/p><\/div><\/section><section class=\"oxy-container-6964-587 oxy-container lyafs-sec\"><div class=\"oxy-container-6964-586 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-576 oxy-container lyafs-head\"><span class=\"oxy-text-6964-574 oxy-text lyafs-rail\">\n02\n<\/span><h2 class=\"oxy-text-6964-575 oxy-text lyafs-h2\">\nHow a stainless part moves through the works\n<\/h2><\/div><p class=\"oxy-text-6964-577 oxy-text lyafs-sub\">\nTwo routes leave the same CAD file and converge at the finished part. One prints a sand mould and core, the other prints a wax pattern and builds a ceramic shell. Both skip pattern making, which is where the schedule usually goes \u2014 and because the mould is data rather than hardware, a revision between the first and second part costs a reprint rather than a new pattern.\n<\/p><ul class=\"oxy-container-6964-584 oxy-container lyafs-figs lyafs-figs--2\"><li class=\"oxy-container-6964-580 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-578 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/05\/3D-Printed-Sand-Cores-for-Engine-Block.jpg\" alt=\"3D printed sand core assembly laid out after printing\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-579 oxy-text\">\nCores printed in one piece<span>No joint line to clean up<\/span>\n<\/figcaption><\/li><li class=\"oxy-container-6964-583 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-581 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2024\/06\/3D-printed-sand-mold-of-pump-valve-1.jpg\" alt=\"3D printed sand mould for a stainless steel pump valve body\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-582 oxy-text\">\nMould for a pump valve body<span>Printed directly from CAD<\/span>\n<\/figcaption><\/li><\/ul><p class=\"oxy-text-6964-585 oxy-text lyafs-p\">\nThe two production routes we run for stainless. Route choice is decided by wall thickness and internal detail, not by the alloy.\n<\/p><\/div><\/section><section class=\"oxy-container-6964-624 oxy-container lyafs-sec lyafs-sec--alt\"><div class=\"oxy-container-6964-623 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-590 oxy-container lyafs-head\"><span class=\"oxy-text-6964-588 oxy-text lyafs-rail\">\n03\n<\/span><h2 class=\"oxy-text-6964-589 oxy-text lyafs-h2\">\nTwo routes from CAD to a stainless part\n<\/h2><\/div><p class=\"oxy-text-6964-591 oxy-text lyafs-p\">\nWhich one fits depends on geometry and how much detail the part carries, not on the alloy. Both skip pattern making entirely, which is where the schedule and the cost usually go.\n<\/p><div class=\"oxy-container-6964-620 oxy-container lyafs-table-wrap\"><table class=\"oxy-container-6964-619 oxy-container lyafs-table\"><caption class=\"oxy-text-6964-592 oxy-text\">\nPrinted sand mould against printed wax pattern, for the same stainless part.\n<\/caption><thead class=\"oxy-container-6964-597 oxy-container\"><tr class=\"oxy-container-6964-596 oxy-container\"><th class=\"oxy-text-6964-593 oxy-text\" scope=\"col\">\n\n<\/th><th class=\"oxy-text-6964-594 oxy-text\" scope=\"col\">\nPrinted sand mould\n<\/th><th class=\"oxy-text-6964-595 oxy-text\" scope=\"col\">\nPrinted wax pattern\n<\/th><\/tr><\/thead><tbody class=\"oxy-container-6964-618 oxy-container\"><tr class=\"oxy-container-6964-601 oxy-container\"><th class=\"oxy-text-6964-598 oxy-text\" scope=\"row\">\n\u30d7\u30ed\u30bb\u30b9\n<\/th><td class=\"oxy-text-6964-599 oxy-text\">\n3DP or SLS printed sand mould and core, then gravity or low-pressure casting\n<\/td><td class=\"oxy-text-6964-600 oxy-text\">\nSLS printed wax pattern, ceramic shell, then investment casting\n<\/td><\/tr><tr class=\"oxy-container-6964-605 oxy-container\"><th class=\"oxy-text-6964-602 oxy-text\" scope=\"row\">\nBest for\n<\/th><td class=\"oxy-text-6964-603 oxy-text\">\nLarger parts, thicker sections, structural and housing geometry\n<\/td><td class=\"oxy-text-6964-604 oxy-text\">\nThin walls, fine detail, complex internal passages, tight finish\n<\/td><\/tr><tr class=\"oxy-container-6964-609 oxy-container\"><th class=\"oxy-text-6964-606 oxy-text\" scope=\"row\">\n\u91d1\u578b\n<\/th><td class=\"oxy-text-6964-607 oxy-text lyafs-yes\">\n\u306a\u3057\n<\/td><td class=\"oxy-text-6964-608 oxy-text lyafs-yes\">\n\u306a\u3057\n<\/td><\/tr><tr class=\"oxy-container-6964-613 oxy-container\"><th class=\"oxy-text-6964-610 oxy-text\" scope=\"row\">\nTypical tolerance\n<\/th><td class=\"oxy-text-6964-611 oxy-text\">\nCT8 to CT12 depending on process route\n<\/td><td class=\"oxy-text-6964-612 oxy-text\">\nDCTG 4 to 6 with a silica-sol shell\n<\/td><\/tr><tr class=\"oxy-container-6964-617 oxy-container\"><th class=\"oxy-text-6964-614 oxy-text\" scope=\"row\">\n\u8868\u9762\u4ed5\u4e0a\u3052\n<\/th><td class=\"oxy-text-6964-615 oxy-text\">\nRa 6.3 to 12.5 as cast\n<\/td><td class=\"oxy-text-6964-616 oxy-text\">\nRa 3.2 to 6.3 as cast\n<\/td><\/tr><\/tbody><\/table><\/div><div class=\"oxy-container-6964-622 oxy-container lyafs-note\"><p class=\"oxy-text-6964-621 oxy-text\">\nA third route exists when the quantity justifies it: a machined steel pattern and shell cores, which is cheaper per part above roughly a few hundred pieces. If your programme is heading there, we will say so rather than quoting printed moulds indefinitely.\n<\/p><\/div><\/div><\/section><section class=\"oxy-container-6964-653 oxy-container lyafs-sec\"><div class=\"oxy-container-6964-652 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-627 oxy-container lyafs-head\"><span class=\"oxy-text-6964-625 oxy-text lyafs-rail\">\n04\n<\/span><h2 class=\"oxy-text-6964-626 oxy-text lyafs-h2\">\nWhat tolerance will you actually get\n<\/h2><\/div><p class=\"oxy-text-6964-628 oxy-text lyafs-sub\">\nCasting drawings are usually specified to a dimensional tolerance grade from GB\/T 6414, which is the Chinese adoption of ISO 8062-3. The grade sets how much a dimension may vary with size. Lower numbers are tighter. Here is where each route normally lands.\n<\/p><p class=\"oxy-text-6964-629 oxy-text lyafs-sub\">\nAcross our foundries the standard working figure is CT8 to CT9 with surface roughness of Ra 3.2 to 12.5. Where a part needs better than that, the fix is usually the process route rather than more machining allowance. On one aluminium pump body we held CT7 at Ra 12.3 by printing the outer mould with 3DP and the internal passage cores with SLS, because the two methods give different strengths where each one matters.\n<\/p><div class=\"oxy-container-6964-649 oxy-container lyafs-table-wrap\"><table class=\"oxy-container-6964-648 oxy-container lyafs-table\"><caption class=\"oxy-text-6964-630 oxy-text\">\nDimensional tolerance grade by process route.\n<\/caption><thead class=\"oxy-container-6964-634 oxy-container\"><tr class=\"oxy-container-6964-633 oxy-container\"><th class=\"oxy-text-6964-631 oxy-text\" scope=\"col\">\nRoute\n<\/th><th class=\"oxy-text-6964-632 oxy-text\" scope=\"col\">\nDimensional tolerance grade\n<\/th><\/tr><\/thead><tbody class=\"oxy-container-6964-647 oxy-container\"><tr class=\"oxy-container-6964-637 oxy-container\"><td class=\"oxy-text-6964-635 oxy-text\">\nInvestment casting, silica-sol shell\n<\/td><td class=\"oxy-text-6964-636 oxy-text lyafs-yes\">\nDCTG 4 to 6\n<\/td><\/tr><tr class=\"oxy-container-6964-640 oxy-container\"><td class=\"oxy-text-6964-638 oxy-text\">\nInvestment casting, water-glass shell\n<\/td><td class=\"oxy-text-6964-639 oxy-text\">\nDCTG 7 to 9\n<\/td><\/tr><tr class=\"oxy-container-6964-643 oxy-container\"><td class=\"oxy-text-6964-641 oxy-text\">\nShell and machine-moulded sand\n<\/td><td class=\"oxy-text-6964-642 oxy-text\">\nDCTG 8 to 12\n<\/td><\/tr><tr class=\"oxy-container-6964-646 oxy-container\"><td class=\"oxy-text-6964-644 oxy-text\">\nHand-rammed sand\n<\/td><td class=\"oxy-text-6964-645 oxy-text\">\nDCTG 11 to 13\n<\/td><\/tr><\/tbody><\/table><\/div><h3 class=\"oxy-text-6964-650 oxy-text lyafs-h3\">\nConfirm the grade before you commit\n<\/h3><p class=\"oxy-text-6964-651 oxy-text lyafs-p\">\nTolerance depends on wall thickness, section transitions and how the part is gated, not only on the process. Send the drawing and the critical dimensions, and we will tell you which grade is realistic and where to leave machining allowance. We do not promise a grade on a part we have not reviewed.\n<\/p><\/div><\/section><section class=\"oxy-container-6964-667 oxy-container lyafs-sec lyafs-sec--alt\"><div class=\"oxy-container-6964-666 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-656 oxy-container lyafs-head\"><span class=\"oxy-text-6964-654 oxy-text lyafs-rail\">\n05\n<\/span><h2 class=\"oxy-text-6964-655 oxy-text lyafs-h2\">\nSize, weight and what we can pour\n<\/h2><\/div><p class=\"oxy-text-6964-657 oxy-text lyafs-p\">\nA single cast runs up to one tonne and up to 1.5 m in its largest dimension on the cast steel line. Across the group we pour roughly 3,000 tonnes of cast steel and 4,000 tonnes of cast iron a year, so a part that starts as a one-off prototype can move to serial production on the same process without a second qualification.\n<\/p><ul class=\"oxy-container-6964-664 oxy-container lyafs-figs lyafs-figs--2\"><li class=\"oxy-container-6964-660 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-658 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/08\/Large-Thin-Walled-Pump-Body-%E2%80%94-Cast-Steel.jpg\" alt=\"Large thin-walled cast steel pump body produced from a 3D printed sand mould\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-659 oxy-text\">\nLarge thin-walled pump body<span>Printed quartz-sand shell, printed ceramsite core<\/span>\n<\/figcaption><\/li><li class=\"oxy-container-6964-663 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-661 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/08\/Turbine-Impeller-%E2%80%94-Superalloy.jpg\" alt=\"Turbine impeller cast in a high-temperature superalloy\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-662 oxy-text\">\nTurbine impeller<span>High-temperature superalloy<\/span>\n<\/figcaption><\/li><\/ul><p class=\"oxy-text-6964-665 oxy-text lyafs-p\">\nA printed quartz-sand shell with a printed ceramsite core held the wall thickness and finish where a conventional pattern would have needed extra stock. The same printed-mould workflow covers nickel and cobalt alloys, not only stainless.\n<\/p><div class=\"oxy-container-6964-773 oxy-container lyafs-note\"><p class=\"oxy-text-6964-772 oxy-text\">\nTwo limits are worth stating plainly. Above one tonne or 1.5 m we will tell you rather than quote it, because the cast steel line is not sized for it. And a part with a section so heavy that it cannot be fed from a printed mould is better served by a forged or rolled blank \u2014 we will say so instead of quoting a casting that will pull a void.\n<\/p><\/div><\/div><\/section><section class=\"oxy-container-6964-690 oxy-container lyafs-sec\"><div class=\"oxy-container-6964-689 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-670 oxy-container lyafs-head\"><span class=\"oxy-text-6964-668 oxy-text lyafs-rail\">\n06\n<\/span><h2 class=\"oxy-text-6964-669 oxy-text lyafs-h2\">\nFrom enquiry to delivered part\n<\/h2><\/div><p class=\"oxy-text-6964-671 oxy-text lyafs-p\">\nFour steps, and you know the price and the realistic tolerance before any metal is poured.\n<\/p><ul class=\"oxy-container-6964-688 oxy-container lyafs-rail-steps\"><li class=\"oxy-container-6964-675 oxy-container\"><span class=\"oxy-text-6964-672 oxy-text lyafs-rail-num\">\n01\n<\/span><h3 class=\"oxy-text-6964-673 oxy-text lyafs-h3\">\nSend the model\n<\/h3><p class=\"oxy-text-6964-674 oxy-text lyafs-p\">\n3D model or drawing, with the alloy, the quantity and the deadline. NDA available before anything is shared.\n<\/p><\/li><li class=\"oxy-container-6964-679 oxy-container\"><span class=\"oxy-text-6964-676 oxy-text lyafs-rail-num\">\n02\n<\/span><h3 class=\"oxy-text-6964-677 oxy-text lyafs-h3\">\nRoute and DFM review\n<\/h3><p class=\"oxy-text-6964-678 oxy-text lyafs-p\">\nWithin 24 hours we tell you which route fits, where to leave machining allowance, and what tolerance is realistic.\n<\/p><\/li><li class=\"oxy-container-6964-683 oxy-container\"><span class=\"oxy-text-6964-680 oxy-text lyafs-rail-num\">\n03\n<\/span><h3 class=\"oxy-text-6964-681 oxy-text lyafs-h3\">\nPrint, pour, verify\n<\/h3><p class=\"oxy-text-6964-682 oxy-text lyafs-p\">\nMould or pattern printed, composition checked by spectrograph before the pour, casting poured and heat treated.\n<\/p><\/li><li class=\"oxy-container-6964-687 oxy-container\"><span class=\"oxy-text-6964-684 oxy-text lyafs-rail-num\">\n04\n<\/span><h3 class=\"oxy-text-6964-685 oxy-text lyafs-h3\">\nMachine, inspect, ship\n<\/h3><p class=\"oxy-text-6964-686 oxy-text lyafs-p\">\nCNC machining, dimensional inspection and NDT in house, then shipping worldwide from Beijing with the records.\n<\/p><\/li><\/ul><\/div><\/section><section class=\"oxy-container-6964-706 oxy-container lyafs-sec lyafs-sec--alt\"><div class=\"oxy-container-6964-705 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-693 oxy-container lyafs-head\"><span class=\"oxy-text-6964-691 oxy-text lyafs-rail\">\n07\n<\/span><h2 class=\"oxy-text-6964-692 oxy-text lyafs-h2\">\nWhat we run, and what comes out\n<\/h2><\/div><p class=\"oxy-text-6964-694 oxy-text lyafs-p\">\nStainless is one alloy family inside a cast steel line, so the same tooling-free workflow covers duplex, nickel and cobalt superalloys where the part calls for it. Mould, core and finishing all sit in one chain, which is why a first article arrives machined rather than raw.\n<\/p><ul class=\"oxy-container-6964-704 oxy-container lyafs-figs\"><li class=\"oxy-container-6964-697 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-695 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/05\/3D-Printed-Mold-Ready-for-Pouring.jpg\" alt=\"3D printed sand mould ready for pouring at the foundry\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-696 oxy-text\">\nMould ready for pouring<span>Mould and cores printed as one assembly<\/span>\n<\/figcaption><\/li><li class=\"oxy-container-6964-700 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-698 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2023\/12\/3D-printed-Pump-valve-sand-core.jpg\" alt=\"3D printed sand core for a stainless steel pump valve body\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-699 oxy-text\">\nCore for a pump valve body<span>Internal passage with no joint line<\/span>\n<\/figcaption><\/li><li class=\"oxy-container-6964-703 oxy-container lyafs-fig\"><img class=\"oxy-image-6964-701 oxy-image\" src=\"https:\/\/www.lyafs.com\/wp-content\/uploads\/2026\/05\/Machining-workshop.jpg\" alt=\"CNC machining workshop where castings are finished in house\" loading=\"lazy\" decoding=\"async\"><figcaption class=\"oxy-text-6964-702 oxy-text\">\nMachining and inspection<span>Same chain as the casting<\/span>\n<\/figcaption><\/li><\/ul><\/div><\/section><section class=\"oxy-container-6964-721 oxy-container lyafs-sec\"><div class=\"oxy-container-6964-720 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-709 oxy-container lyafs-head\"><span class=\"oxy-text-6964-707 oxy-text lyafs-rail\">\n08\n<\/span><h2 class=\"oxy-text-6964-708 oxy-text lyafs-h2\">\nHow we keep the alloy honest\n<\/h2><\/div><p class=\"oxy-text-6964-710 oxy-text lyafs-sub\">\nStainless failures are usually composition failures, not shape failures. A heat that drifts on chromium or molybdenum will pass a visual check and then pit in service, so composition is verified before the pour rather than after.\n<\/p><ul class=\"oxy-container-6964-719 oxy-container lyafs-deflist lyafs-deflist--wide\"><li class=\"oxy-container-6964-712 oxy-container\"><div class=\"oxy-text-6964-711 oxy-text\">\n<b>Spectrographic analysis on every heat<\/b> \u2014 alloy composition is checked before pouring, not sampled afterwards.\n<\/div><\/li><li class=\"oxy-container-6964-714 oxy-container\"><div class=\"oxy-text-6964-713 oxy-text\">\n<b>Nine inspection methods in house<\/b> \u2014 dimensional inspection on a coordinate measuring machine and laser scanner, plus non-destructive testing before the part ships.\n<\/div><\/li><li class=\"oxy-container-6964-716 oxy-container\"><div class=\"oxy-text-6964-715 oxy-text\">\n<b>Full chain under one roof<\/b> \u2014 casting, heat treatment, CNC machining, surface treatment and inspection run in the same workflow, so responsibility for a rejected part is never split between suppliers.\n<\/div><\/li><li class=\"oxy-container-6964-718 oxy-container\"><div class=\"oxy-text-6964-717 oxy-text\">\n<b>Traceability per heat<\/b> \u2014 castings are marked so composition and process records can be traced back to the pour.\n<\/div><\/li><\/ul><\/div><\/section><section class=\"oxy-container-6964-738 oxy-container lyafs-sec lyafs-sec--alt\"><div class=\"oxy-container-6964-737 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-724 oxy-container lyafs-head\"><span class=\"oxy-text-6964-722 oxy-text lyafs-rail\">\n09\n<\/span><h2 class=\"oxy-text-6964-723 oxy-text lyafs-h2\">\nWhere stainless castings from printed moulds pay off\n<\/h2><\/div><p class=\"oxy-text-6964-725 oxy-text lyafs-p\">\nThe economics change depending on why you needed stainless and how many parts you need. Three cases come up repeatedly.\n<\/p><ul class=\"oxy-container-6964-735 oxy-container lyafs-grid lyafs-grid--3\"><li class=\"oxy-container-6964-728 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-726 oxy-text lyafs-h3\">\nPumps, valves and marine hardware\n<\/h3><p class=\"oxy-text-6964-727 oxy-text lyafs-p\">\n316 and duplex for impellers, volutes, bodies and stems exposed to chlorides. We cast a duplex pump impeller at 150 mm diameter with a 4.5 mm outlet on printed wax patterns, delivering the first small batch in 20 days at roughly half the cost of the traditional route.\n<\/p><\/li><li class=\"oxy-container-6964-731 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-729 oxy-text lyafs-h3\">\nChemical and process equipment\n<\/h3><p class=\"oxy-text-6964-730 oxy-text lyafs-p\">\nParts where a pinhole becomes a leak and a leak becomes a shutdown. Printed moulds allow the internal passage cores to be made in one piece, which removes the joint lines that traditional coring leaves behind.\n<\/p><\/li><li class=\"oxy-container-6964-734 oxy-container lyafs-card\"><h3 class=\"oxy-text-6964-732 oxy-text lyafs-h3\">\nReplacement and obsolete parts\n<\/h3><p class=\"oxy-text-6964-733 oxy-text lyafs-p\">\nA discontinued stainless casting with no drawing left is a common problem. Where a sample exists, it can be scanned, rebuilt as a model and cast without a pattern, which is often the only route that does not require buying tooling for a single part.\n<\/p><\/li><\/ul><p class=\"oxy-text-6964-736 oxy-text lyafs-p\">\nFor the wider picture of what the printed-mould route covers beyond stainless, see <a href=\"\/ja\/services\/rapid-casting\/\">\u6025\u901f\u92f3\u9020<\/a>. Other material routes: <a href=\"\/ja\/services\/ductile-iron-casting\/\">ductile iron casting<\/a>, <a href=\"\/ja\/services\/cast-steel-casting\/\">cast steel casting<\/a> \u305d\u3057\u3066 <a href=\"\/ja\/services\/bronze-casting\/\">bronze and brass casting<\/a>. Related: <a href=\"\/ja\/applications\/marine-pumps-valves-castings\/\">marine, pumps and valves castings<\/a>, <a href=\"\/ja\/applications\/energy-castings\/\">power and energy castings<\/a>, <a href=\"\/ja\/services\/rapid-prototype-casting\/\">rapid prototype casting<\/a>, \u3001\u304a\u3088\u3073 <a href=\"\/ja\/blog\/sand-3d-printing-vs-investment-casting\/\">printing versus investment casting compared<\/a>.\n<\/p><\/div><\/section><section class=\"oxy-container-6964-762 oxy-container lyafs-sec\"><div class=\"oxy-container-6964-761 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-741 oxy-container lyafs-head\"><span class=\"oxy-text-6964-739 oxy-text lyafs-rail\">\n10\n<\/span><h2 class=\"oxy-text-6964-740 oxy-text lyafs-h2\">\nQuestions we get before a first stainless order\n<\/h2><\/div><ul class=\"oxy-container-6964-760 oxy-container lyafs-faq\"><li class=\"oxy-container-6964-744 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-742 oxy-text\">\nDo I need to pay for a pattern or tooling?\n<\/h3><p class=\"oxy-text-6964-743 oxy-text\">\nNo. Both routes print the mould or the pattern directly from your CAD file, so there is no pattern to make, no pattern to store and no pattern cost to amortise. It also means a design change between the first and second part costs nothing.\n<\/p><\/li><li class=\"oxy-container-6964-747 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-745 oxy-text\">\nWhat is the smallest quantity you will run?\n<\/h3><p class=\"oxy-text-6964-746 oxy-text\">\nOne part. Tooling is what normally forces a minimum order quantity in casting, and printing removes it. Most stainless work we see is prototype and validation quantities of five to fifty pieces, but single parts for fit checks are routine.\n<\/p><\/li><li class=\"oxy-container-6964-750 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-748 oxy-text\">\nWhy is stainless harder to cast than carbon steel?\n<\/h3><p class=\"oxy-text-6964-749 oxy-text\">\nIt is less about temperature than about chemistry. Stainless holds a tenacious oxide film that does not float out of the melt, so a turbulent pour folds it into the casting as inclusions. It also has a narrower freezing range and lower thermal conductivity than carbon steel, which changes how the mould has to be fed and how the part cools. None of that makes it uncastable \u2014 it makes the gating and the fill rate matter more.\n<\/p><\/li><li class=\"oxy-container-6964-753 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-751 oxy-text\">\n304 or 316 for a marine part?\n<\/h3><p class=\"oxy-text-6964-752 oxy-text\">\n316. Its molybdenum content resists pitting and crevice corrosion in chlorides, which is exactly where 304 breaks down. If the part also sees high chloride stress and temperature, duplex is worth pricing before you settle on 316.\n<\/p><\/li><li class=\"oxy-container-6964-756 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-754 oxy-text\">\nCan you machine the casting before it ships?\n<\/h3><p class=\"oxy-text-6964-755 oxy-text\">\nYes. CNC machining, heat treatment and surface treatment are part of the same in-house chain, so you can receive a finished part rather than a raw casting. About the only thing to decide early is where you want machining allowance left.\n<\/p><\/li><li class=\"oxy-container-6964-759 oxy-container lyafs-qa\"><h3 class=\"oxy-text-6964-757 oxy-text\">\nHow do I get a price?\n<\/h3><p class=\"oxy-text-6964-758 oxy-text\">\nSend the 3D model or drawing with the alloy, quantity and deadline. We review within 24 hours. Pricing depends on alloy, wall thickness, section complexity and inspection requirements, so we quote the actual part rather than publishing a rate per kilogram that will not hold.\n<\/p><\/li><\/ul><\/div><\/section><section class=\"oxy-container-6964-771 oxy-container lyafs-sec lyafs-sec--ink\"><div class=\"oxy-container-6964-770 oxy-container lyafs-inner\"><div class=\"oxy-container-6964-765 oxy-container lyafs-head\"><span class=\"oxy-text-6964-763 oxy-text lyafs-rail\">\n11\n<\/span><h2 class=\"oxy-text-6964-764 oxy-text lyafs-h2\">\nSend the drawing, get a straight answer\n<\/h2><\/div><p class=\"oxy-text-6964-766 oxy-text lyafs-p\">\nUpload your CAD file with alloy, quantity and deadline. We will tell you which route fits, what tolerance is realistic and what it costs. If printed moulds are not the cheaper route for your quantity, we will say so.\n<\/p><div class=\"oxy-container-6964-769 oxy-container lyafs-cta-row\"><a class=\"oxy-text-link-6964-767 oxy-text-link lyafs-btn\" href=\"\/ja\/get-a-quote\/\" target=\"_self\">\nGet a quote\n<\/a><a class=\"oxy-text-link-6964-768 oxy-text-link lyafs-btn lyafs-btn--ghost\" href=\"\/ja\/about-us\/contact\/\" target=\"_self\">\nTalk to an application engineer\n<\/a><\/div><\/div><\/section><\/main>","protected":false},"excerpt":{"rendered":"<p>Stainless steel casting Stainless Steel Casting Without Tooling Cost A pattern is the most expensive and slowest part of any stainless steel casting project. We remove it. Printed sand moulds and printed wax patterns go straight from your CAD file to the foundry floor, so a design change costs nothing and the first part can be poured while a conventional shop is still quoting pattern work. Send your CAD for a quote See grades and limits 1 tMaximum single cast weight 1.5 mMaximum casting dimension 20 daysTypical small-batch delivery CT8 to CT9Standard dimensional tolerance 01 Stainless grades we cast Stainless sits inside our cast steel line, which we run through [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5408,"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-6964","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<title>Stainless Steel Casting Services | 304, 316 &amp; Duplex - 3DPTEK | AFS<\/title>\n<meta name=\"description\" content=\"Cast 304, 316, 17-4PH and duplex stainless from printed molds. No pattern cost, no tooling lead time. 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