CN3M Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
CN3M is a stainless steel grade covered by ASTM A743. Typical family applications include pump casings, impellers, valve bodies and covers.
| Field | Value |
|---|---|
| Designation | CN3M |
| Material Type | Stainless Steel |
| Sub Type | Austenitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
N/A
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| ASTM A743 | Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application | 03 | CN3M | UNS J94652 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A743Edition 03 |
|---|---|
| C | ≤ 0.03 % |
| Si | ≤ 1.0 % |
| Mn | ≤ 2.0 % |
| P | ≤ 0.03 % |
| S | ≤ 0.03 % |
| Cr | 20.0–22.0 % |
| Ni | 23.0–27.0 % |
| Mo | 4.5–5.5 % |
Heat Treatment
ASTM A743–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 2150 °F / ≥ 1175 °C[1] | — |
| 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
Mechanical Properties
Core Mechanical Properties
Notes
ASTM A743 · Edition 03
[1] Tensile Strength/Yield Strength/Elongation: Applies only when Supplementary Requirement S12 is specified; Condition: heat treatment per; separately cast keel block per S12.2 unless S12.3 agreement applies
Welding Conditions
N/A
Applications
Austenitic stainless steel ASTM A743 Grade CN3M is typically used for cake-wash pump castings for chemical-processing service. Other cast components used in this material family include pump casings, impellers, valve bodies and covers. Typical settings include chemical and pharmaceutical processing, pulp-and-paper plants and selected water-handling systems.
Suitability for a particular acid, concentration or temperature remains grade- and process-specific.
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Email Us for a QuoteLast Updated: November 6, 2026