China Stainless Steel Casting
China Stainless Steel Casting is one of the core capabilities of Leesh Holdings, an ISO 9001:2015 certified foundry group in China. We produce custom stainless steel casting parts by silica sol investment casting, water glass investment casting and sand casting — from 0.05 kg precision CF8M stainless steel casting components to large pump and valve bodies. Stainless steel castings from China are chosen by OEMs worldwide for their cost advantage, and our in-house tooling, CNC machining and full inspection equipment make every part ready to install on arrival.
China Stainless Steel Casting Product Gallery
The photos below show typical China stainless steel casting parts finished in our machining workshop:
Custom Stainless Steel Casting in China
As one of the leading China stainless steel casting suppliers, Leesh Holdings controls every part from tooling design to final inspection. Compared with machining from solid bar, a near-net-shape casting saves material and cost, especially for complex and thin-walled stainless parts.
- Material grades: ASTM A351/A743 CF8, CF8M, CF3, CF3M, 4A, 6A; SUS304, SUS316, 1.4301; stainless iron 201, 420, 430; duplex on request;
- Casting processes: silica sol and water glass investment casting, plus resin sand and green sand casting for large parts;
- Precision machining: CNC lathes and machining centers finish bores, sealing faces and flanges at Ra 3.2–6.3 μm;
- Surface finishing: mirror and electrolytic polishing, brushing, passivation, zinc or chrome plating;
- Flexible cooperation: samples from 1 piece, low MOQ and stable capacity for mass production.
Product Specifications
The table below shows the standard capability range of our China stainless steel casting service; requirements beyond these values are always welcome.
ItemSpecificationMaterial gradesASTM A351/A743 CF8, CF8M, CF3, CF3M; SUS304, SUS316, 1.4301; stainless iron 201/420/430; duplex on requestCasting processSilica sol investment casting, water glass investment casting, resin sand and green sand castingWeight range0.05 kg – 100 kg by investment casting; larger stainless steel sand casting parts on requestThin-wall capabilityWalls down to 0.25–0.
| 4 mm; smallest cast holes 2.5 mm | |
| Tolerance | ISO 8062 CT4–CT6 (silica sol); CT6–CT8 (water glass); machined dimensions per drawing |
| Surface roughness | Ra 3.2–6.3 μm (silica sol); Ra 6.3–12.5 μm (water glass) |
| Typical parts | China stainless steel casting parts such as pump casings, valve bodies, impellers and flanges |
| Heat treatment | Solution treatment, annealing and normalizing on request |
| Surface treatment | Mirror / electrolytic polishing, brushing, passivation, zinc or chrome plating |
| Quality documents | Spectrometer report, dimension report, heat treatment report; MT/UT/RT on request |
Casting & Machining Process Flow
Each China stainless steel casting passes through eight controlled steps before shipment:
| No. | Process Step | Key Control |
|---|---|---|
| 1 | Tooling & pattern making | Aluminum wax dies and sand patterns designed by CAD/CAM |
| 2 | Wax injection & tree assembly | Wax patterns injected and assembled into clusters |
| 3 | Shell building | Dipping and coating with silica sol or water glass layers |
| 4 | De-waxing & shell firing | Autoclave de-waxing and high-temperature shell firing |
| 5 | Melting & pouring | Medium-frequency induction furnaces; spectrometer check before every pour |
| 6 | Knockout & grinding | Shell removal, gate cut-off and grinding |
| 7 | Heat treatment & machining | Solution or annealing treatment, then CNC machining of bores and faces |
| 8 | Inspection & packing | CMM, surface and NDT checks, seaworthy packing |
Leesh Holdings Investment Casting Service & Process
Stainless steel investment casting, also known as lost wax casting, produces near-net-shape parts with excellent surface quality and tight tolerances. Leesh Holdings is a key leading supplier of investment casting parts to both the China and global market, serving pump and valve, railway, petroleum, ship, agricultural and construction machinery industries.
Our China stainless steel casting capability covers silica sol castings of 0.05–50 kg at ISO 8062 CT4–CT6 and water glass castings of 0.10–100 kg at CT6–CT8, in SUS304, SUS316, 1.4301, CF8 and CF8M grades, with stainless iron, carbon steel, alloy steel and brass available on the same production line.
- Complex shapes without extensive machining;
- Excellent surface quality and dimensional accuracy;
- Wide range of alloys available on one production line;
- Cost-effective from small sample trials to large production runs.
Typical Applications
Our China stainless steel casting components serve the following markets:
ApplicationTypical CastingsKey RequirementsPump & valve systemsPump casings, impellers, valve bodies and bonnetsCorrosion resistance, pressure tightnessPetroleum machineryFlanges, valve blocks and fittingsStrength, NDT soundnessRailway & truck industryBrackets, couplings and hinge partsFatigue strength, dimensional accuracyShip & marine equipmentDeck hardware and marine fittingsSalt-spray corrosion resistanceConstruction & mining machineryLinkages, adapters and machine partsToughness, stable batch qualityElectric power equipmentHousings, clamps and precision fittingsFine finish, tight tolerances
Quality Control & Testing
Quality is designed into every China stainless steel casting instead of being inspected in afterwards. Our lab runs a spectrum analyzer, metallographic microscope and tensile and low-temperature impact testing machines, while X-ray, magnetic particle and ultrasonic flaw detectors check internal soundness. Critical dimensions are measured on CMM and image measuring instruments, and every shipment comes with a material certificate, dimension report and heat treatment report. Third-party inspection by SGS, BV or TÜV is welcome before delivery.
Inside Our Foundry
Real production scenes from our investment casting workshop — from wax injection to final inspection under one roof:
Frequently Asked Questions
1. What information do you need to quote a China stainless steel casting?
Please send the 2D drawing with tolerances (PDF) and a 3D model (STEP or IGS) if available, together with the material grade or working environment, estimated weight and annual quantity. Our engineers will reply with a casting plan, unit price and lead time within 24–48 hours.
2. What is your MOQ and delivery time?
Samples start from 1–10 pieces. Wax tooling usually takes 2–4 weeks and first samples 4–6 weeks after drawing confirmation, while batch production takes 5–8 weeks depending on process and machining scope. Sea, air and express shipping are all supported.
3. Can the castings be machined, polished and pressure tested before shipment?
Yes. CNC machining, mirror and electrolytic polishing are completed in our own workshops, and every China stainless steel casting with pressure-bearing walls is air or water tested before packing. Dimension reports, material certificates and test reports are sent together with the goods.
4. Which stainless steel grade should I choose?
CF8 (304) suits general corrosive environments, while a CF8M stainless steel casting (316) is the most popular choice for chlorides and acids. For higher strength and pitting resistance we recommend duplex 2205; our metallurgists will confirm the best grade after reviewing your working conditions.
Request a Quote for China Stainless Steel Casting
Share your drawings or sample pictures — our casting engineers will get back to you with price and lead time within 48 hours.
