CH8 Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
CH8 is an austenitic stainless steel grade covered by ASTM A351. Typical family applications include pump casings, impellers, covers and pipe fittings.
| Field | Value |
|---|---|
| Designation | CH8 |
| 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 | CH8 | UNS J93400 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 |
|---|---|
| C | ≤ 0.08 % |
| Si | ≤ 1.50 % |
| Mn | ≤ 1.50 % |
| P | ≤ 0.040 % |
| S | ≤ 0.040 % |
| Cr | 22.0–26.0 % |
| Ni | 12.0–15.0 % |
| Mo | ≤ 0.50 % |
Heat Treatment
ASTM A351–03 · Heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat treat | ≥ 2100 °F / ≥ 1150 °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 | ≥ 65 ksi ≥ 450 MPa |
| Yield Strength (Rp0.2) | ≥ 28 ksi ≥ 195 MPa |
| Elongation | ≥ 30.0 % |
Welding Conditions
N/A
Applications
Austenitic stainless steel ASTM A351 Grade CH8 is typically used for pressure-containing cast components such as valve bodies, flanges and fittings, subject to grade-specific service requirements. Other cast components used in this material family include pump casings, impellers, covers and pipe fittings. Typical settings include chemical and pharmaceutical plants, food and beverage machinery, and filling, mixing and liquid-handling systems.
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Email Us for a QuoteLast Updated: November 6, 2026