Introduction
CF8M is a molybdenum-bearing austenitic stainless steel casting grade covered by the applicable ASTM casting specifications. Grade selection depends on the intended service and standard requirements. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | CF8M |
| Material Type | Stainless Steel |
| Sub Type | Austenitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
- GX5CrNiMo19-11-2 (1.4408) — EN 10213 / EN 10283[1]
Notes
- [1] Chemical comparison (similar grade reference); Historical manual confirmation (similar grade reference).
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| ASTM A351 | Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts | 03 | CF8M | UNS J92900 |
| ASTM A743 | Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application | 03 | CF8M | UNS J92900 |
| ASTM A744 | Standard Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service | 00e1 | CF8M | UNS J92900 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 | ASTM A743Edition 03 | ASTM A744Edition 00e1 |
|---|---|---|---|
| C | ≤ 0.08 % | ≤ 0.08 % | ≤ 0.08 % |
| Si | ≤ 1.50 % | ≤ 2.00 % | ≤ 2.0 % |
| Mn | ≤ 1.50 % | ≤ 1.50 % | ≤ 1.50 % |
| P | ≤ 0.040 % | ≤ 0.04 % | ≤ 0.04 % |
| S | ≤ 0.040 % | ≤ 0.04 % | ≤ 0.04 % |
| Cr | 18.0–21.0 % | 18.0–21.0 % | 18.0–21.0 % |
| Ni | 9.0–12.0 % | 9.0–12.0 % | 9.0–12.0 % |
| Mo | 2.0–3.0 % | 2.0–3.0 % | 2.0–3.0 % |
Heat Treatment
ASTM A351–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat treat | ≥ 1900 °F / ≥ 1040 °C | — |
| 2 | Quench or rapid cool | — | water quench or rapid cooling by other means |
ASTM A743–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 1900 °F / ≥ 1040 °C[1] | — |
| 2 | Quench or rapid cool | — | water quench or rapid cooling by other means |
ASTM A744–00e1 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 1900 °F / ≥ 1040 °C[2] | — |
| 2 | Quench or rapid cool | — | water quench or rapid cooling by other means |
Notes
ASTM A743 · Edition 03
[1] Heat treatment: sufficient time to heat casting to temperature
ASTM A744 · Edition 00e1
[2] Heat treatment: sufficient time to heat casting to temperature; A For optimum tensile strength, ductility, and corrosion resistance, the solution annealing temperatures for Grades CF8M, CG8M, and CF3M should be in excess of 1900°F [1040°C].
Mechanical Properties
| Property | ASTM A351Edition 03 | ASTM A743Edition 03 | ASTM A744Edition 00e1 |
|---|---|---|---|
| Tensile Strength | ≥ 70 ksi ≥ 485 MPa | ≥ 70 ksi[1] ≥ 485 MPa[1] | ≥ 70 ksi[2] ≥ 485 MPa[2] |
| Yield Strength (Rp0.2) | ≥ 30 ksi ≥ 205 MPa | — / Not specified | — / Not specified |
| Elongation | ≥ 30.0 % | ≥ 30 %[1] | ≥ 30 %[2] |
| Yield Strength | — / Not specified | ≥ 30 ksi[1] ≥ 205 MPa[1] | ≥ 30 ksi[2] ≥ 205 MPa[2] |
Notes
ASTM A743 · Edition 03
[1] Tensile Strength/Elongation/Yield Strength: Applies only when Supplementary Requirement S12 is specified; Condition: heat treatment per; separately cast keel block per S12.2 unless S12.3 agreement applies
ASTM A744 · Edition 00e1
[2] Tensile Strength/Elongation/Yield Strength: Applies only when Supplementary Requirement S22 is specified; Condition: heat treated to the same production procedure as the casting; separately cast keel block per S22.2
Welding Conditions
N/A
Applications
Typical cast-component applications include pump and valve parts used in pulp and paper processing.
Last Updated: October 16, 2026