ASME SA-437 Grade B4C Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: United States / ASME

Data updates

Latest Update: 2024-02

Total number of updates: 4

Update History

2023-11 2020-12 2016-01

This material has 67 properties — only a subset is shown here.

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ASME SA-437 Grade B4C Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.05

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.20 – 0.25

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

11.0 – 12.5

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-31-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-32-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-33-7

ASME Boiler and Pressure Vessel Code An International Code Section II - Part A Ferrous Material Specifications, American Society of Mechanical Engineers, 2025

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ASME SA-437 Grade B4C Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Density

7.61 — 8.1 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 67 properties — only a subset is shown here.

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ASME SA-437 Grade B4C Heat Treatments

The material shall be heated to a temperature range of 1025 to 1050°C (1875 to 1925°F) and liquid quenched to below 316°C (600°F). Then shall be uniformly reheated for tempering at a tempering temperature at least 55°C (100°F) higher than the proposed operating temperature but not less than 620°C (1150°F), then air or furnace cooled to room temperature. The material shall be at the tempering temperature for a minimum of 2 h. Double tempering may be used to enhance properties.
Stress relieving treatment of the bar material is required after any stretcher, roller, or rotary-straightening or cold-finishing operations performed after heat treatment for mechanical properties. The minimum stress relieving temperature shall be 55°C (100°F) below the minimum tempering temperature.

ASME SA-437 Grade B4C Mechanical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Tensile Strength

≥ 790 MPa

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Brinell Hardness (HB)

229 — 277

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Elongation, A

≥ 18 %

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Yield Strength, Rp0.2

val1 MPa

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Grain Size

val1

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Impact Energy

val1 J

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Reduction of Area

val1 %

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Rockwell Hardness (HR)

val1

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ASME SA-437 Grade B4C International Equivalent Materials

Showing 5 of 7 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

A 437 Grade B4C

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Official

MATERIAL

SA-437 Grade B4B

STANDARD

ASME

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

K91352

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

A 437 Grade B4B

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

S42225

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

Need the full list of 7 international equivalents?

See all 7 equivalent grades with detailed mapping by standard, producer and equivalence category.

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7Cross References

13Composition
28Mechanical Properties
3Physical Properties
1Heat Treatment
-Metallography
-Machinability

-Stress-Strain
-Formability
-Fatigue
-Fracture
14Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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