CF8 Investment Casting Services
Leesh Holdings is a specialized CF8 Investment Casting manufacturer producing high-quality CF8 (cast 304) stainless steel parts for valve, pump, food, pharmaceutical and marine industries — from prototype to volume production, with full inspection and machining capabilities.
What Is CF8 Stainless Steel?
CF8 Investment Casting produces the cast equivalent of wrought 304 stainless steel, defined under ASTM A351 with 18–21% chromium and 8–11% nickel. It offers excellent corrosion resistance, good weldability and strong low-temperature toughness — a cost-effective choice for general corrosive service across a wide range of industries.
Excellent Corrosion Resistance
Resists atmospheric corrosion, fresh water, mild acids and alkalis — dependable in general corrosive service.
High Strength & Toughness
Minimum 485 MPa tensile strength with outstanding impact toughness even at low temperatures.
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.
CF8 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) | 8.0 – 11.0 |
| Silicon (Si) | ≤ 2.00 | Molybdenum (Mo) | Not specified |
| Phosphorus (P) | ≤ 0.04 | Sulfur (S) | ≤ 0.04 |
International equivalents: CF8 ≡ 304 (wrought) ≡ 1.4308 / GX5CrNi19-10 (EN 10283) ≡ SCS13 (JIS G5121) ≡ ZG08Cr18Ni9 (GB/T 2100) ≡ UNS J92600.
CF8 Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 485 (70) | MPa (ksi) |
| Yield Strength (0.2% offset) | ≥ 205 (30) | MPa (ksi) |
| Elongation | ≥ 35 | % |
| 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.
CF8 vs CF8M — How to Choose
Both grades share the same strength levels. The deciding factor is the service media.
| Grade | Wrought Equivalent | Molybdenum | Corrosion Resistance | Best For |
|---|---|---|---|---|
| CF8 | 304 | — | General corrosive service | Water, mild chemicals, food, cost-sensitive projects |
| CF8M | 316 | 2.0 – 3.0% | Superior in chlorides & acids | Seawater, chemical, marine environments |
Not sure which grade fits your application? Send us your media, temperature and pressure — our engineers will advise within 24 hours.
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
With spectro-verified chemistry, CF8 investment casting steel is melted and 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.
Foundry Inside
A look inside Leesh Holdings — complete investment casting facilities from wax injection to final inspection, all under one roof.
Wax Pattern Assembly
Ceramic Shell Building
Melting & Pouring
CNC Machining & InspectionCF8 Casting Applications
Reliable, corrosion-resistant components for general corrosive and sanitary service.
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 CF8 Investment Casting?
Send us your drawing or sample — get a custom quotation with material certification within 24 hours.
info@leesh.cn
