Stainless Steel Casting
Precision Stainless Steel Casting Services
Custom stainless steel investment castings engineered for high-corrosion environments, high-pressure systems, and structural industrial applications. We deliver net-shape and near-net-shape components conforming to ASTM, ISO, and DIN standards.
Stainless Steel Casting Capabilities
Our production facility operates automated shell-making lines and medium-frequency induction melting furnaces to support prototype development, mid-volume batches, and high-volume OEM production.
Dimensional Tolerances:
ISO 8062-3 CT4-CT6 for investment casting; CT7-CT9 for sand casting.
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Surface Roughness:
Ra 3.2 um to 6.3 um as-cast; Ra 0.8 um or better following precision machining.
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Weight Range:
0.05 kg to 85 kg per casting.
03
Wall Thickness:
Minimum 1.5 mm wall thickness (geometry-dependent).
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Production Capacity:
5,000 metric tons annually across 3 specialized casting lines.
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Stainless Steel Grades for Casting
304 Stainless Steel
• Standard Equivalent: UNS S30400 / CF8 (ASTM A743)
• Chemical Composition: 18-20% Cr, 8-10.5% Ni
• Mechanical Properties: Tensile Strength >= 485 MPa, Yield Strength >= 205 MPa, Elongation >= 35%
• Characteristics & Applications: General-purpose corrosion resistance. Standard choice for food processing equipment, architectural hardware, and valve bodies operating in non-acidic environments.
316 Stainless Steel
• Standard Equivalent: UNS S31600 / CF8M (ASTM A743)
• Chemical Composition: 16-18% Cr, 10-14% Ni, 2-3% Mo
• Mechanical Properties: Tensile Strength >= 485 MPa, Yield Strength >= 205 MPa, Elongation >= 30%
• Characteristics & Applications: Molybdenum addition improves pitting resistance in chloride environments. Used in marine hardware, chemical processing valves, and fluid management systems.
316L Stainless Steel
• Standard Equivalent: UNS S31603 / CF3M (ASTM A743)
• Chemical Composition: 16-18% Cr, 10-14% Ni, 2-3% Mo, Carbon <= 0.03%
• Mechanical Properties: Tensile Strength >= 485 MPa, Yield Strength >= 170 MPa, Elongation >= 30%
• Characteristics & Applications: Low carbon content prevents chromium carbide precipitation during welding, eliminating intergranular corrosion in welded assemblies. Used in pharmaceutical equipment and welded pressure vessels.
17-4 PH Stainless Steel
• Standard Equivalent: UNS S17400 / CB7Cu-1 (ASTM A747)
• Chemical Composition: 15-17.5% Cr, 3-5% Ni, 3-5% Cu, 0.15-0.45% Nb
• Mechanical Properties (H900 Condition): Tensile Strength >= 1310 MPa, Yield Strength >= 1170 MPa, Hardness >= 40 HRC
• Characteristics & Applications: Precipitation-hardening martensitic stainless steel offering high mechanical strength and moderate corrosion resistance. Applied in turbine blades, high-load structural brackets, and pump shafts.
CF8M Stainless Steel
• Standard Equivalent: Cast equivalent of AISI 316 (ASTM A351 / A743)
• Chemical Composition: 18-21% Cr, 9-12% Ni, 2-3% Mo, Carbon <= 0.08%
• Mechanical Properties: Tensile Strength >= 485 MPa, Yield Strength >= 205 MPa, Elongation >= 30%
• Characteristics & Applications: The standard cast alloy for pressure-containing parts. Specially formulated for fluid control components, pump casings, and pipeline flanges requiring pressure tightness.
Stainless Steel Casting Processes
|
Process Feature |
Silica Sol Investment Casting |
Water Glass Investment Casting |
Resin Sand Casting |
|
Primary Application |
Complex, high-precision, thin-walled components |
Medium-precision structural components |
Large, heavy-duty industrial components |
|
Surface Finish (Ra) |
3.2 - 6.3 um |
6.3 - 12.5 um |
12.5 - 25 um |
|
Dimensional Tolerance |
ISO 8062 CT4 - CT6 |
ISO 8062 CT7 - CT8 |
ISO 8062 CT8 - CT10 |
|
Weight Range |
0.02 kg - 35 kg |
0.5 kg - 50 kg |
10 kg - 500+ kg |
|
Tooling Cost |
Moderate to High |
Low to Moderate |
Low |
|
Internal Soundness |
Superior (minimal porosity) |
Standard |
Standard |
Chemical & Petrochemical: Pump impellers, valve housings, pipe fittings, strainers, strain-gauge housings.
Food & Dairy Processing: Mixing blades, sanitary valve bodies, conveyor brackets, fluid pumps.
Marine Hardware: Deck cleats, hinges, stern tube bearings, thru-hull fittings, impeller housings.
Energy & Power Generation: Turbine components, burner nozzles, heat exchanger brackets, pressure seal rings.
Industrial Automation & Hydraulics: Manifold blocks, cylinder heads, linkage arms, actuator bodies.
Heat Treatment and Machining
Heat Treatment Capabilities
• Solution Annealing (1040 deg C - 1150 deg C): Rapid water quenching dissolves chromium carbides back into the austenitic matrix, restoring full corrosion resistance and ductility.
• Stress Relieving (300 deg C - 400 deg C): Removes residual stresses induced by heavy machining without altering phase microstructures.
• Precipitation Hardening (H900, H1025, H1150): Tailors hardness and yield strength for 17-4 PH alloys to meet structural requirements up to 44 HRC.
CNC Machining Capabilities
• Equipment: 3-axis, 4-axis, and 5-axis CNC machining centers, CNC lathes, horizontal boring mills.
• Machining Tolerances: Precision turning and milling down to +/- 0.005 mm.
• Secondary Operations: Tapping, reaming, broaching, wire EDM, grinding, and dynamic balancing for rotating parts.
Quality Control and Inspection
Quality verification occurs at three operational stages: incoming raw materials, process execution, and final release.
Chemical Analysis: Optical Emission Spectrometry (OES) verifies melt chemistry prior to tapping.
Nondestructive Testing (NDT):
• Radiographic Testing (RT) for internal porosity verification.
• Liquid Penetrant Testing (PT) for surface defect detection.
• Ultrasonic Testing (UT) for wall thickness and subsurface integrity.
• Hydrostatic Pressure Testing up to 200 bar for pressure-containing valve and pump bodies.
Destructive & Physical Testing: Tensile testing, Impact testing (Charpy V-notch), Hardness testing (HB, HRC), Metallographic grain structure analysis.
Dimensional Inspection: Coordinate Measuring Machines (CMM) with 3D scan capability, optical profile projectors, thread gauges.
Certifications & Compliance: ISO 9001:2015 certified; full EN 10204 3.1 material test certificates (MTC) supplied with every production lot.
Custom Stainless Steel Castings
We transform customer engineering files into finished castings through an integrated DFM (Design for Manufacturability) workflow.
DFM Review & Solidification Simulation:
MAGMA/ProCAST simulation identifies potential shrinkage porosity, cold shuts, or turbulent flow before cutting mold steel.
Tooling Design & Fabrication:
In-house aluminum mold creation using high-speed CNC centers to accelerate sampling.
Rapid Prototyping:
3D-printed wax patterns for fast sample verification without committing to hard tooling.
Tooling Modification:
Rapid engineering changes accommodated directly via local CAM modifications.
Pump & Valve Components: Impellers (open, semi-open, closed), butterfly valve discs, globe valve bodies, ball valve seats.
Pipe Fittings & Connectors: High-pressure elbows, tees, unions, hose couplings, quick-disconnect fittings.
Structural & Fastening Hardware: Heavy-duty hinges, mounting brackets, rigging shackles, glass clamp fittings.
Machinery Parts: Wear plates, chain sprockets, gear housings, guide rails.
What Buyers Should Specify
Providing comprehensive technical parameters during the initial RFQ reduces revision cycles and speeds up quotation accuracy. Include the following in your specifications:
2D and 3D CAD Drawings:
Step, IGS, or DWG files with critical tolerances and datum references marked.
Material Grade & Standard:
Specify exact grade and underlying standard (e.g., ASTM A743 CF8M vs. AISI 316).
Inspection & NDT Requirements:
Define required testing levels (e.g., 100% PT, 10% RT, Hydrostatic test pressure).
Machining Requirements:
Indicate as-cast surfaces versus machined functional faces and thread specifications.
Surface Finish Specifications:
Specify passivated, shot-blasted, electropolished, or hand-polished finishes.
Order Quantities:
Prototype batch sizes, initial run volumes, and estimated annual usage (EAU).
FAQ
We're well-known as one of the leading stainless steel casting manufacturers and suppliers in China. If you're going to wholesale high quality stainless steel casting with competitive price, welcome to get more information from our factory.
