ASTM A193 Grade B7 M64 and under

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Description

Related Standards

Equivalent Materials

Properties

General

Density ρ

7.8 - 7.9 g/cm³ at 20 °C

Typical for Chromium Molybdenum Steel

Mechanical

Elastic modulus E

200 - 215 GPa at 20 °C

Typical for Chromium Molybdenum Steel

Elongation A50 A50

16 % at 20 °C

Hardness, Brinell HB

321 [-] at 20 °C

Hardness, Rockwell C HRC

35 [-] at 20 °C

Poisson's ratio ν

0.29 [-] at 20 °C

Typical for Chromium Molybdenum Steel

Reduction of area Z

50 % at 20 °C

Tensile strength Rm

860 MPa at 20 °C

Yield Strength Rp0.2, short transverse Rp0.2,shorttrans_

720 MPa at 20 °C

Thermal

Coefficient of thermal expansion α

1.1E-5 - 1.4E-5 1/K at 20 °C

Typical for Chromium Molybdenum Steel

Melting point Tm

1382 - 1529 °C

Typical for Chromium Molybdenum Steel

Specific heat capacity cp

448 - 502 J/(kg·K) at 20 °C

Typical for Chromium Molybdenum Steel

Thermal conductivity λ

36 - 43 W/(m·K) at 20 °C

Typical for Chromium Molybdenum Steel

Chemical properties

Element

Weight %

Comment

Cr

0.8 - 1.1 %

Mn

0.75 - 1 %

C

0.38 - 0.48 %

Mo

0.15 - 0.25 %

Si

0.15 - 0.35 %

More

This material data has been provided by ASTM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.