CN7MS Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
CN7MS is a stainless steel grade covered by ASTM A743, ASTM A744. Typical applications include pump and valve castings in chemical-processing and pharmaceutical equipment, with marine uses also reported by foundries.
| Field | Value |
|---|---|
| Designation | CN7MS |
| 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 | CN7MS | UNS J94650 |
| ASTM A744 | Standard Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service | 00e1 | CN7MS | UNS J94650 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A743Edition 03 | ASTM A744Edition 00e1 |
|---|---|---|
| C | ≤ 0.07 % | ≤ 0.07 % |
| Si | 2.50–3.50 % | 2.50–3.50 % |
| Mn | ≤ 1.00 % | ≤ 1.0 % |
| P | ≤ 0.04 % | ≤ 0.04 % |
| S | ≤ 0.03 % | ≤ 0.03 % |
| Cr | 18.0–20.0 % | 18.0–20.0 % |
| Ni | 22.0–25.0 % | 22.0–25.0 % |
| Mo | 2.5–3.0 % | 2.5–3.0 % |
| Cu | 1.5–2.0 % | 1.5–2.0 % |
Heat Treatment
ASTM A743–03 · Heat treatment and water quenching
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | 2100–2150 °F / 1150–1180 °C; Holding time: ≥ 2 h | — |
| 2 | Quench | — | water |
ASTM A744–00e1 · Heat treatment and water quenching
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | 2100–2150 °F / 1150–1180 °C; Holding time: ≥ 2 h | — |
| 2 | Quench | — | water |
Mechanical Properties
Core Mechanical Properties
ASTM A743 — 03 · Table S12.1 — Normative
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
ASTM A744 · Edition 00e1
[2] Tensile Strength/Yield Strength/Elongation: 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
CN7MS is used for pump and valve castings in chemical-processing and pharmaceutical equipment, with marine uses also reported by foundries. 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