CG6MMN Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
CG6MMN is an austenitic stainless steel grade covered by ASTM A351, ASTM A743. Typical applications include pump and valve castings in chemical processing, food production and selected marine equipment.
| Field | Value |
|---|---|
| Designation | CG6MMN |
| 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 A351 | Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts | 03 | CG6MMN | UNS J93790 |
| ASTM A743 | Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application | 03 | CG6MMN | UNS J93790 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 | ASTM A743Edition 03 |
|---|---|---|
| C | ≤ 0.06 % | ≤ 0.06 % |
| Si | ≤ 1.00 % | ≤ 1.00 % |
| Mn | 4.00–6.00 % | 4.00–6.00 % |
| P | ≤ 0.040 % | ≤ 0.04 % |
| S | ≤ 0.030 % | ≤ 0.03 % |
| Cr | 20.50–23.50 % | 20.5–23.5 % |
| Ni | 11.50–13.50 % | 11.5–13.5 % |
| Mo | 1.50–3.00 % | 1.50–3.00 % |
| N | 0.20–0.40 % | 0.20–0.40 % |
| Nb | 0.10–0.30 % | 0.10–0.30 % |
| V | 0.10–0.30 % | 0.10–0.30 % |
Heat Treatment
ASTM A351–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat treat | ≥ 2050 °F / ≥ 1120 °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 | ≥ 2050 °F / ≥ 1120 °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
ASTM A351 — 03 · Table 3 — Normative
| Property | heat treated |
|---|---|
| Tensile Strength | ≥ 85 ksi ≥ 585 MPa |
| Yield Strength (Rp0.2) | ≥ 42.5 ksi ≥ 295 MPa |
| Elongation | ≥ 30.0 % |
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
CG6MMN is used for pump and valve castings in chemical processing, food production and selected marine equipment. 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