CD3MWCuN Duplex Stainless Steel Casting Material
Duplex Stainless Steel
Introduction
CD3MWCuN is a duplex stainless steel casting grade covered by ASTM A351. Typical family applications include impellers, covers and valve bodies.
| Field | Value |
|---|---|
| Designation | CD3MWCuN |
| Material Type | Stainless Steel |
| Sub Type | Duplex Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
| Standard | Material Grade |
|---|---|
| EN 10213 EN 10283 ISO 11972 | GX2CrNiMoN25-7-3 |
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 | CD3MWCuN | UNS J93380 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 |
|---|---|
| C | ≤ 0.03 % |
| Si | ≤ 1.00 % |
| Mn | ≤ 1.00 % |
| P | ≤ 0.030 % |
| S | ≤ 0.025 % |
| Cr | 24.0–26.0 % |
| Ni | 6.5–8.5 % |
| Mo | 3.0–4.0 % |
| Cu | 0.5–1.0 % |
| N | 0.20–0.30 % |
| W | 0.5–1.0 % |
| Cr + 3.3 * Mo + 16 * N ≥ 40% | Cr + 3.3 * Mo + 16 * N ≥ 40%[1] |
Notes
ASTM A351 · Edition 03
[1] Cr + 3.3 * Mo + 16 * N ≥ 40%: B % Cr + 3.3 % Mo + 16 % N $ 40.
Heat Treatment
ASTM A351–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat treat | ≥ 2010 °F / ≥ 1100 °C | — |
| 2 | Quench or rapid cool | — | water quench or rapid cooling by other means |
Mechanical Properties
Core Mechanical Properties
ASTM A351 — 03 · Table 3 — Normative
| Property | heat treated |
|---|---|
| Tensile Strength | ≥ 100 ksi ≥ 700 MPa |
| Yield Strength (Rp0.2) | ≥ 65 ksi ≥ 450 MPa |
| Elongation | ≥ 25.0 % |
Welding Conditions
N/A
Applications
Duplex stainless steel ASTM A351 Grade CD3MWCuN is typically used for cast pump components for demanding corrosive fluid-handling service, including pulp and paper applications. Other cast components used in this material family include impellers, covers and valve bodies. Applications include water treatment, chemical processing, selected marine systems, desalination and pulp-and-paper pumping equipment.
The appropriate duplex grade depends on the actual water chemistry and operating conditions.
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Email Us for a QuoteLast Updated: November 6, 2026