Introduction
CD4MCu is a duplex stainless steel grade specified in ASTM A351 for pressure-containing cast components. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | CD4MCu |
| Material Type | Stainless Steel |
| Sub Type | Duplex Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
N/A
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 | CD4MCu | UNS J93370 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 |
|---|---|
| C | ≤ 0.04 % |
| Si | ≤ 1.00 % |
| Mn | ≤ 1.00 % |
| P | ≤ 0.04 % |
| S | ≤ 0.04 % |
| Cr | 24.5–26.5 % |
| Ni | 4.75–6.00 % |
| Mo | 1.75–2.25 % |
| Cu | 2.75–3.25 % |
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 |
Mechanical Properties
| Property | ASTM A351Edition 03 |
|---|---|
| Tensile Strength | ≥ 100 ksi ≥ 690 MPa |
| Yield Strength (Rp0.2) | ≥ 70 ksi ≥ 485 MPa |
| Elongation | ≥ 16.0 % |
Welding Conditions
N/A
Applications
Typical casting applications include pressure-containing cast components such as valve bodies, flanges and fittings, subject to grade-specific service requirements.
Last Updated: October 13, 2026