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Stainless Steel Casting

Stainless Steel Casting

Details:

Precision silica sol investment casting engineered for 304, 316L, 17-4PH, and duplex stainless steels delivering extreme corrosion resistance, high strength, and sanitary finish.

Choosing the Right Stainless Steel Casting Process for Your Part

Precision silica sol investment casting engineered for 304, 316L, 17-4PH, and duplex stainless steels delivering extreme corrosion resistance, high strength, and sanitary finish.

Why Specify Cast Stainless Steel for Sanitary and Chemical Duty

01

Exceptional Corrosion and Chemical Resistance

Thrives in marine, acidic, alkaline, and high salinity processing environments without surface pitting or degradation.

02

High Mechanical Strength and Hardness

Precipitation hardening alloys like 17-4PH deliver extreme load bearing capacity and wear resistance up to HRC 40+.

03

High Temperature Oxidation Stability

Resists scaling, heat distortion, and thermal creep at operating temperatures reaching up to 900°C.

04

Hygienic and Polishable Surface

Electropolished mirror finishes (Ra 0.4µm) compliant with FDA and EHEDG standards for fast, sanitary, and medical equipment.

Stainless Steel Casting Production Floor

Classification

Materials

Austenitic Stainless Steel (CF8/304 and CF8M/316L)

Standard food and chemical grade alloys providing maximum corrosion resistance, superior cryogenic toughness, and excellent weldability.

Martensitic and Precipitation Hardening (17-4PH/420)

High strength alloys optimized for heat treatment, delivering exceptional hardness and wear resistance for valve stems, gears, and pump shafts.

Duplex and Super Duplex Alloys (2205/2507)

Dual phase microstructures providing extreme resistance to stress corrosion cracking in offshore oil, gas, and desalination equipment.

Stainless Steel Casting Materials
Stainless Steel Casting Forming Methods

Forming Method

Silica Sol Investment Casting

Premier lost wax process yielding smooth raw surface finishes (Ra 3.2µm), sharp dimensional details, and tight casting tolerances (ISO CT4 to CT6).

Water Glass Investment Casting

Cost effective lost wax method for medium to large structural stainless steel brackets, hinges, and flanges.

Vacuum Investment Casting

Eliminates gas entrapment and micro porosity during pour, ideal for aerospace impellers and high speed turbine blades.

Shell Mold Casting

High rigidity resin shell molds for heavy wall industrial stainless steel valve bodies and pump casings.

Stainless Steel Casting Process Parameters

Technical tolerances and chemical inspection controls are agreed to deliver high integrity stainless steel castings.

Parameter
Description
Machining Allowance
Standard 0.8mm to 2.0mm added on mating faces, bores, and threads for 5 axis CNC finishing
Surface Roughness
Ra 3.2µm raw silica sol investment casting, down to Ra 0.4µm after post electropolishing
Linear Pattern Shrinkage
2.0% to 2.5% volume contraction allowance engineered into CAD pattern tooling
Minimum Wall Thickness
1.5mm for silica sol investment casting, enabling complex thin walled impellers and vanes
Corrosion Resistance Rating
1,000+ hours neutral salt spray test (ASTM B117) with zero pitting or rust formation
Non Destructive Testing (NDT)
Dye penetrant inspection (PT), radiographic X ray (RT), and QES melt chemistry certification
Casting Tolerances
ISO 8062 CT4 to CT5 raw investment casting tolerance, with post machined features held to ±0.02mm

Stainless Steel Casting Production Workflow

Four controlled stages guaranteeing strict chemical composition, zero porosity, and precise dimensional execution.

Alloy Melt Spectrometry and Pattern Injection
01

Alloy Melt Spectrometry and Pattern Injection

Certified virgin stainless steel ingots are verified for exact Cr Ni Mo ratios. Precision wax patterns are injected and assembled into trees.

Silica Sol Shell Building and Dewaxing
02

Silica Sol Shell Building and Dewaxing

Wax trees undergo robotic dipping in silica sol slurries to build multi layer ceramic shells, followed by high pressure steam dewaxing.

1050°C Shell Firing and Vacuum Pouring
03

1050°C Shell Firing and Vacuum Pouring

Ceramic shells are pre fired at 1050°C to eliminate moisture and poured with degassed liquid stainless steel under vacuum assistance.

Chemical Passivation and CNC Machining
04

Chemical Passivation and CNC Machining

Castings are knocked out, passivated in nitric acid baths to form passive oxide films, electropolished, and 5 axis CNC machined.

Industrial Applications

High integrity stainless steel castings serving chemical, sanitary food, marine, and medical industries.

Chemical and Petrochemical Valves

Chemical and Petrochemical Valves

Food and Dairy Processing Machinery

Food and Dairy Processing Machinery

Marine Hardware and Fittings

Marine Hardware and Fittings

Medical and Pharmaceutical Pumps

Medical and Pharmaceutical Pumps

Equipment Integration and Systems

Precision cast stainless steel casting components provide essential weight savings, strength, and thermal dissipation for automated hardware.

Device Diagram

Popular Products

316L Investment Cast Valve Housing

316L Investment Cast Valve Housing

Sanitary Stainless Steel Impeller

Sanitary Stainless Steel Impeller

17-4PH High Strength Gear Component

17-4PH High Strength Gear Component

Frequently Asked
Questions?

Stainless Steel Casting Technical FAQ
Which stainless steel grades does Sango routinely investment cast?

CF8 (cast 304) and CF8M (cast 316L) for standard chemical and food grade corrosion resistance, 17-4PH for high strength precipitation hardened components, and 2205/2507 duplex alloys for offshore and desalination equipment requiring stress corrosion cracking resistance.

What is the difference between silica sol and water glass investment casting?
How do you prevent surface rusting on cast 316L stainless steel?
Can stainless steel castings be heat treated for extra hardness?
What quality certificates accompany stainless steel orders?
Can you cast complex thin walled impellers?