CA15 Martensitic Stainless Steel Casting Material
Martensitic Stainless Steel
Introduction
CA15 is a martensitic stainless steel grade covered by ASTM A743. Typical applications include pump and valve castings in chemical processing, oil refining and power-generation equipment.
| Field | Value |
|---|---|
| Designation | CA15 |
| Material Type | Stainless Steel |
| Sub Type | Martensitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
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 | CA15 | UNS J91150 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A743Edition 03 |
|---|---|
| C | ≤ 0.15 % |
| Si | ≤ 1.50 % |
| Mn | ≤ 1.00 % |
| P | ≤ 0.04 % |
| S | ≤ 0.04 % |
| Cr | 11.5–14.0 % |
| Ni | ≤ 1.00 % |
| Mo | ≤ 0.50 % |
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 | Cooling |
|---|---|---|---|
| 1 | Anneal | ≥ 1450 °F / ≥ 790 °C | — |
Mechanical Properties
Core Mechanical Properties
ASTM A743 — 03 · Table S12.1 — Normative
ASTM A743 — 03 — Normative
| Property | Value |
|---|---|
| Brinell Hardness | ≤ 241 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
Martensitic stainless steel ASTM A743 Grade CA15 is used for pump and valve castings in chemical processing, oil refining and power-generation equipment. Foundry guidance also lists marine applications. Earlier use in turbine runners is also documented; that historical application does not make this grade a default choice for a new runner.
Other cast components used in this material family include impellers, pump casings, valve bodies and internal pump and valve parts. These castings are used in water-service pumping systems, industrial process equipment and power-generation facilities.
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