CB30 Ferritic Stainless Steel Casting Material
Ferritic Stainless Steel
Introduction
CB30 is a ferritic stainless steel grade covered by ASTM A743. Typical applications include pump and valve components, pistons, shafts, sleeves and bearings.
| Field | Value |
|---|---|
| Designation | CB30 |
| Material Type | Stainless Steel |
| Sub Type | Ferritic 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 | CB30 | UNS J91803 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM A743Edition 03 |
|---|---|
| C | ≤ 0.30 % |
| Si | ≤ 1.50 % |
| Mn | ≤ 1.00 % |
| P | ≤ 0.04 % |
| S | ≤ 0.04 % |
| Cr | 18.0–21.0 % |
| Ni | ≤ 2.00 % |
| Cu | 0.90–1.20 %[1] |
Notes
ASTM A743 · Edition 03
[1] Cu: B For Grade CB30 a copper content of 0.90 to 1.20% is optional.
Heat Treatment
ASTM A743–03 · Air cooling alternative
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 1450 °F / ≥ 790 °C | — |
| 2 | Cool | — | air |
ASTM A743–03 · Furnace cooling alternative
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Heat | ≥ 1450 °F / ≥ 790 °C | — |
| 2 | Cool | — | furnace |
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: 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
Ferritic stainless steel ASTM A743 Grade CB30 is used for pump and valve components, pistons, shafts, sleeves and bearings. Other cast components used in this material family include stationary pump casings and seats. Typical industrial settings include chemical processing, mining and pulp-and-paper equipment. Aggressive liquids, sliding contact and suspended solids require assessment for the particular service.
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Email Us for a QuoteLast Updated: November 6, 2026