CF8M Stainless Steel Investment Casting Services
Leesh Holdings manufactures high-quality CF8M (cast 316) stainless steel investment castings for pump, valve, chemical, food and marine industries — from prototype to volume production, with full inspection and machining capabilities.
What Is CF8M Stainless Steel?
CF8M is the cast equivalent of wrought 316 stainless steel, defined under ASTM A351. The addition of 2.0–3.0% molybdenum gives CF8M significantly better resistance to pitting, crevice corrosion and chloride attack than CF8 (cast 304) — making it the preferred choice for aggressive media in chemical and marine environments.
Superior Corrosion Resistance
Molybdenum addition resists chlorides, seawater and acidic media — ideal for harsh service conditions.
High Strength & Toughness
Minimum 485 MPa tensile strength with excellent low-temperature impact toughness.
Near-Net-Shape Precision
Investment casting delivers complex geometries with tight tolerances and smooth surface finish.
Full Traceability
Heat-lot traceability, chemical spectro analysis and mechanical test reports per batch.
CF8M Chemical Composition
Conforming to ASTM A351 / A351M. Single values are maximum percentages unless shown as a range.
| Element | Content (%) | Element | Content (%) |
|---|---|---|---|
| Carbon (C) | ≤ 0.08 | Chromium (Cr) | 18.0 – 21.0 |
| Manganese (Mn) | ≤ 1.50 | Nickel (Ni) | 9.0 – 12.0 |
| Silicon (Si) | ≤ 2.00 | Molybdenum (Mo) | 2.0 – 3.0 |
| Phosphorus (P) | ≤ 0.04 | Sulfur (S) | ≤ 0.04 |
International equivalents: CF8M ≡ 316 (wrought) ≡ 1.4408 / GX5CrNiMo19-11-2 (EN 10283) ≡ SCS14 (JIS G5121) ≡ ZG08Cr19Ni11Mo2 (GB/T 2100) ≡ UNS J92900.
CF8M Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 485 (70) | MPa (ksi) |
| Yield Strength (0.2% offset) | ≥ 205 (30) | MPa (ksi) |
| Elongation | ≥ 30 | % |
| Hardness (typical, not a spec requirement) | 140 – 200 | HBW |
| Density | ≈ 7.75 – 7.80 | g/cm³ |
| Heat Treatment | Solution annealed at ≥ 1040°C, water quenched | — |
Test reports (chemical & mechanical) available upon request for every production batch.
Our Investment Casting Process
A complete in-house lost-wax casting chain — from tooling design to finished, inspected parts.
Wax Pattern
Precision wax injection with low shrinkage for accurate replication of your part geometry.
Shell Building
Patterns assembled on runners, coated with multiple ceramic shell layers.
Dewax & Firing
Wax removed in autoclave; shells fired to gain strength before pouring.
Melting & Pouring
CF8M melted with spectro-verified chemistry, poured into preheated shells.
Knockout & Cut-off
Shell removal, runner cutting and gate grinding for clean part surfaces.
Heat Treatment
Solution annealing restores corrosion resistance and optimum mechanical properties.
Machining
CNC machining, surface grinding and thread cutting to final drawing tolerances.
Inspection & Delivery
Dimensional, hydrostatic, X-ray and material test reports before shipment.
Our Foundry
Inside Leesh Holdings — a complete investment casting facility from wax injection to final inspection, all under one roof.
Wax Injection Workshop
Ceramic Shell Building
Melting & Pouring
CNC Machining & InspectionCF8M Casting Applications
Where chloride resistance and reliability are non-negotiable.
Quality & Capabilities
- ISO 9001 certified production management
- Spectrometer chemical analysis per heat
- X-ray / radiographic testing on critical sections
- Hydrostatic & air pressure testing
- Dye penetrant inspection on demand
- Full CMM dimensional reports
- Passivation & pickling per ASTM A380
- Custom tooling — rapid prototype to production
Need CF8M Investment Castings?
Send us your drawing or sample — get a custom quotation with material certification within 24 hours.
info@leesh.cn
