ASTM A304 Grade 4140H

Equivalent material: DIN 1.7225, DIN 42CrMo4, DIN 42CrMo4V, DIN 41CrMo4V, AFNOR 42CD4, BS 708M40, BS 709M40, BS EN19, UNI 42CrMo4, SS 2244, UNE 42CrMo4, UNE F.125, AISI 4140, AISI 4140H, AISI 4142H, AISI 4142, AISI 4145, AISI NV-7, SAE 4140, SAE 4140H, SAE 4142H, SAE 4142, SAE 4145, SAE NV-7, JIS SCM440, JIS SCM440M, JIS SCM440H, JIS SNB7, EN 42CrMo4, EN 42CrMo4V, EN 41CrMo4V, EN 1.7225, GOST 38ChM, GB/T 42CrMo, GB/T A30425, ASTM 4142H, ASTM 4145, ASTM Grade B7, ASTM Grade B7M, ASTM Grade 12, ASTM Grade 7M, ASTM Grade L7, UNS G41400, UNS H41400, UNS H41420, UNS G41420, UNS G41450, IS 40Cr1Mo28

ASTM A304 Grade 4140H general

Property Temperature Value Comment
Density 23.0 °C Density of 7.8 - 7.9 g/cm³ Typical for Chromium Molybdenum Steel

ASTM A304 Grade 4140H thermal

Property Temperature Value Comment
Coefficient of thermal expansion 23.0 °C Coefficient of thermal expansion of 1.1E-5 - 1.4E-5 1/K Typical for Chromium Molybdenum Steel
Melting point - Melting point of 1382 - 1529 °C Typical for Chromium Molybdenum Steel
Specific heat capacity 23.0 °C Specific heat capacity of 448 - 502 J/(kg·K) Typical for Chromium Molybdenum Steel
Thermal conductivity 23.0 °C Thermal conductivity of 36 - 43 W/(m·K) Typical for Chromium Molybdenum Steel

ASTM A304 Grade 4140H electrical

Property Value
Carbon Carbon of 0.37 - 0.44 %
Chromium Chromium of 0.75 - 1.2 %
Copper Copper of 0.35 %
Manganese Manganese of 0.65 - 1.1 %
Molybdenum Molybdenum of 0.15 - 0.25 %
Nickel Nickel of 0.25 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.15 - 0.35 %
Sulfur Sulfur of 0.04 %

ASTM A304 Grade 4140H mechanical

Property Temperature Value Comment
Elastic modulus 23.0 °C Elastic modulus of 200 - 215 GPa Typical for Chromium Molybdenum Steel
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for Chromium Molybdenum Steel

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