Introduction
CA40 is a martensitic stainless steel grade specified in ASTM A743 for general corrosion-resistant castings. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | CA40 |
| Material Type | Stainless Steel |
| Sub Type | Martensitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
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 | CA40 | UNS J91153 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A743Edition 03 |
|---|---|
| C | 0.20–0.40 % |
| Si | ≤ 1.50 % |
| Mn | ≤ 1.00 % |
| P | ≤ 0.04 % |
| S | ≤ 0.04 % |
| Cr | 11.5–14.0 % |
| Ni | ≤ 1.0 % |
| Mo | ≤ 0.5 % |
Heat Treatment
ASTM A743–03 · Air cooling and tempering
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 1750 °F / ≥ 955 °C | — |
| 2 | Air cool | — | air |
| 3 | Temper | ≥ 1100 °F / ≥ 595 °C | — |
ASTM A743–03 · Annealing alternative
| Step | Operation | Temperature |
|---|---|---|
| 1 | Anneal | ≥ 1450 °F / ≥ 790 °C |
Mechanical Properties
| Property | ASTM A743Edition 03 |
|---|---|
| Tensile Strength | ≥ 100 ksi[1] ≥ 690 MPa[1] |
| Yield Strength | ≥ 70 ksi[1] ≥ 485 MPa[1] |
| Elongation | ≥ 15 %[1] |
| Reduction of Area | ≥ 25 %[1] |
| Brinell Hardness | ≤ 269 HB[2] |
Notes
ASTM A743 · Edition 03
[1] Tensile Strength/Yield Strength/Elongation/Reduction of Area: Applies only when Supplementary Requirement S12 is specified; Condition: heat treatment per; separately cast keel block per S12.2 unless S12.3 agreement applies
[2] Brinell Hardness: Applies only when Supplementary Requirement S14 is specified; Condition: non-austenitic grade; treatment; non-austenitic; per manufacturer–purchaser agreement (S14.2)
Welding Conditions
N/A
Applications
Typical casting applications include pump and valve castings for chemical processing, marine, refining and power-generation equipment.
Last Updated: October 13, 2026