ASTM A668 Class H Normalized and tempered

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Description

Related Standards

Equivalent Materials

Properties

General

Density ρ

7.8 - 7.9 g/cm³ at 20 °C

Typical for Nickel Chromium Molybdenum Steel

Mechanical

Elastic modulus E

200 - 215 GPa at 20 °C

Typical for Nickel Chromium Molybdenum Steel

Elongation A50 A50

18 - 22 % at 20 °C

Hardness, Brinell HB

187 - 235 [-] at 20 °C

Poisson's ratio ν

0.29 [-] at 20 °C

Typical for Nickel Chromium Molybdenum Steel

Reduction of area Z

40 - 44 % at 20 °C

Tensile strength Rm

620 MPa at 20 °C

Yield strength YS

400 - 415 MPa at 20 °C

Thermal

Coefficient of thermal expansion α

1E-5 - 1.3E-5 1/K at 20 °C

Typical for Nickel Chromium Molybdenum Steel

Melting point Tm

1382 - 1529 °C

Typical for Nickel Chromium Molybdenum Steel

Thermal conductivity λ

34 - 54 W/(m·K) at 20 °C

Typical for Nickel Chromium Molybdenum Steel

Chemical properties

Element

Weight %

Comment

P

0.04 %

S

0.03 %

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.