HK40 Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
HK40 is an austenitic stainless steel grade covered by ASTM A351. Typical applications include burner rings, radiant tubes, retorts and other cast components in furnaces and petroleum-processing equipment.
| Field | Value |
|---|---|
| Designation | HK40 |
| Material Type | Stainless Steel |
| Sub Type | Austenitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
| Standard | Material Grade |
|---|---|
| EN 10295 | GX40CrNiSi25-20 |
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 | HK40 | UNS J94204 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A351Edition 03 |
|---|---|
| C | 0.35–0.45 % |
| Si | ≤ 1.75 % |
| Mn | ≤ 1.50 % |
| P | ≤ 0.040 % |
| S | ≤ 0.040 % |
| Cr | 23.0–27.0 % |
| Ni | 19.0–22.0 % |
| Mo | ≤ 0.50 % |
Heat Treatment
ASTM A351–03
N/A
Mechanical Properties
Core Mechanical Properties
ASTM A351 — 03 · Table 3 — Normative
| Property | as-cast |
|---|---|
| Tensile Strength | ≥ 62 ksi ≥ 425 MPa |
| Yield Strength (Rp0.2) | ≥ 35 ksi ≥ 240 MPa |
| Elongation | ≥ 10.0 % |
Welding Conditions
N/A
Applications
Austenitic stainless steel ASTM A351 Grade HK40 is used for burner rings, radiant tubes, retorts and other cast components in furnaces and petroleum-processing equipment. Other cast components used in this material family include furnace fixtures, support elements and burner-assembly components. These applications include industrial heating and heat-treatment equipment.
Atmosphere, loading, direct flame exposure, cyclic operation and process deposits must be considered separately from an in-air reference temperature.
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Email Us for a QuoteLast Updated: November 6, 2026