Investment Casting

Custom Industrial Castings: Precision Metal Castings & CNC Machining Services

Engineering-led production of ferrous and non-ferrous metal castings manufactured strictly to ASTM, EN, and DIN specifications. We supply raw and fully machined components engineered for high-load, pressure-tight, and wear-resistant industrial applications.

Lost Wax Investment Casting
We are a direct, IATF16949 certified foundry. No trading offices. No middleman markups. We do the wax injection, pouring, CNC work, and zinc plating all in one single building. You talk straight...
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Heat Resistant Steel Casting
WUDI COUNTY SHUN YE STAINLESS STEEL PRODUCTS CO., LTD. specializes in manufacturing high-quality heat resistant steel castings using advanced silica sol investment casting technology. Our heat...
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Alloy Steel Investment Casting
WUDI COUNTY SHUN YE STAINLESS STEEL PRODUCTS CO., LTD. specializes in manufacturing high-quality alloy steel investment castings using advanced silica sol investment casting technology. Our alloy...
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Stainless Steel Investment Casting
WUDI COUNTY SHUN YE STAINLESS STEEL PRODUCTS CO., LTD. specializes in manufacturing high-quality stainless steel investment castings using advanced silica sol investment casting technology. Our...
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Carbon Steel Investment Casting
WUDI COUNTY SHUN YE STAINLESS STEEL PRODUCTS CO., LTD. specializes in manufacturing high-quality carbon steel investment castings using advanced silica sol investment casting technology. Our...
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Product Range & Casting Processes

Casting Process	Typical Weight Range	Dimensional Tolerance	Surface Finish (Ra)	Best Suited For
Investment Casting (Lost Wax)	0.05 kg – 80 kg	ISO 8062 DCTG 4–6	3.2–6.3 µm	Complex geometries, thin walls, near-net-shape precision parts
Sand Casting (Resin / Green Sand)	0.5 kg – 5,000 kg+	ISO 8062 DCTG 8–10	12.5–25 µm	Medium-to-large structural housings, heavy valve bodies, frames
Die Casting (High / Low Pressure)	0.1 kg – 35 kg	ISO 8062 DCTG 3–5	1.6–3.2 µm	High-volume aluminum and zinc structural components, motor shells

Materials & International Standards

Material Category	Available Grades
Stainless Steel	CF8 (304), CF8M (316), 1.4408, Duplex 2205 (UNS S31803), Super Duplex 2507
Carbon & Alloy Steel	WCB, LCB, 4140, 8620, 42CrMo4, 20CrNiMo
Ductile & Gray Iron	GGG40 / QT400-15, GGG50 / QT500-7, GG25 / HT250, ADI (Austempered Ductile Iron)
Aluminum Alloys	A356, A380, ADC12, AlSi10Mg
Copper Base Alloys	C83600 (Bronze), C95800 (Nickel Aluminum Bronze), Brass

Precision Investment Casting Stainless Valve Parts

Secondary Operations & CNC Machining

Precision Machining: 3-axis, 4-axis, and 5-axis CNC milling, horizontal turning, vertical boring, and grinding. CNC tolerances held down to ±0.010 mm based on part geometry.

Heat Treatment: Annealing, Normalizing, Quenching & Tempering (Q&T), Solution Treatment, Stress Relieving, and Induction Hardening.

Surface Finishing: Shot blasting, sand blasting, electro-polishing, zinc plating, powder coating, liquid painting, and anodizing.

Quality Assurance & Inspection Protocols

01/

Chemical & Mechanical
Equipment / Method: Optical Emission Spectrometer, Tensile Tester, Charpy Impact, Brinell/Rockwell Hardness
Standards / Verification: EN 10204 3.1 MTR, Heat Code Traceability

02/

Dimensional Accuracy
Equipment / Method: CMM (Coordinate Measuring Machine), Optical Scanner, Height Gauges, Thread Gauges
Standards / Verification: PPAP Level 3, FAI (First Article Inspection) Reports

03/

Non-Destructive Testing (NDT)
Equipment / Method: Radiographic Testing (RT), Ultrasonic Testing (UT), Magnetic Particle (MT), Dye Penetrant (PT)
Standards / Verification: ASTM E446, ASTM E186, ISO 9712 Certified Technicians

04/

Pressure Integrity
Equipment / Method: Hydrostatic Testing (up to 300 bar), Pneumatic Air-Underwater Leak Testing
Standards / Verification: Leakage verification for pressure-containing valve and pump bodies

OEM / ODM Customization Workflow

Accepted File Formats

STEP, IGES, X_T, DWG, PDF.

Design Support

SolidWorks Simulation & MAGMA Mold Flow analysis to evaluate filling patterns and reduce shrinkage risks during tooling setup.

Tooling & Prototyping

Aluminum tooling, wooden pattern making, 3D printed sand/wax patterns for rapid prototype evaluation prior to mass production.

Production Lead Times & Logistics

Sample / First Article Lead Time: 15–25 business days (including tooling development and FAI documentation).
Mass Production Lead Time: 30–40 business days depending on order volume and machining complexity.
Packaging Standards: VCI anti-rust bags, custom foam inserts, fumigated wooden crates, and steel-banded euro-pallets.
Shipping Options: FOB, CIF, DDP (Sea, Air, Rail, or Express Courier).

FAQ

Q: How do you verify the chemical and mechanical properties of each casting batch?

A: We run spectrographic chemical analysis on every furnace heat prior to pouring. Material test bars are cast alongside each batch to perform tensile and impact tests. All shipments include an EN 10204 3.1 Mill Test Report mapped via heat codes.

Q: How do you handle internal shrinkage for pressure-containing parts like pump and valve bodies?

A: We utilize MAGMA mold flow simulation during the tooling design phase to optimize gating and risering systems, minimizing internal shrinkage and porosity in thick sections. Final components undergo 100% hydrostatic or pneumatic pressure testing per your specified rating.

Q: What NDT inspections are performed for critical components?

A: We perform Dye Penetrant Inspection (PT) and Magnetic Particle Inspection (MT) in-house. Radiographic Testing (RT) and Ultrasonic Testing (UT) are conducted by ISO 9712 Level II/III certified technicians in compliance with ASTM reference standards.

Q: What casting tolerances can be achieved before secondary machining?

A: For investment casting, we maintain ISO 8062 DCTG 4–6. For sand casting, tolerances conform to ISO 8062 DCTG 8–10. Tighter dimensional limits are achieved through subsequent CNC finishing.

Q: What is the minimum order quantity (MOQ) for custom OEM castings?

A: MOQ depends on the casting process and part weight. Investment casting typically starts at 100–500 pieces per run, whereas heavy sand castings can start at 1–5 pieces per order.

Q: What documentation is included with First Article Samples?

A: First Article Inspection (FAI) packages include a comprehensive CMM dimensional report, EN 10204 3.1 Material Test Report, Heat Treatment Certificate, Surface Roughness Measurement, and relevant NDT inspection reports.

WUDI COUNTY SHUN YE STAINLESS STEEL PRODUCTS CO.,LTD. is one of the most professional investment casting manufacturers and suppliers in China, also supports customized service. Welcome to buy bulk cheap investment casting made in China here and get quotation from our factory. For price consultation, contact us.

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