SAE J1268 Grade 4120H

Equivalent material: DIN 1.7216, DIN 30CrMo4, AFNOR 30CrMo4, BS 30CrMo4, AISI 4120H, JIS STH 21, JIS SCM430, EN 30CrMo4, EN 1.7216, GOST 30ChM, GOST 30ChMA, UNS H41200

SAE J1268 Grade 4120H general

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

SAE J1268 Grade 4120H 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

SAE J1268 Grade 4120H electrical

Property Value
Carbon Carbon of 0.18 - 0.23 %
Chromium Chromium of 0.4 - 0.6 %
Copper Copper of 0.35 %
Iron balance
Manganese Manganese of 0.9 - 1.2 %
Molybdenum Molybdenum of 0.13 - 0.2 %
Silicon Silicon of 0.15 - 0.35 %

SAE J1268 Grade 4120H 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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Henan Bebon Iron&Steel Co., Ltd.

Xicheng Science & Technology Building High-tech Development Zone, Zhengzhou, China

Tel: +86-371-86151827

E-Mail: [email protected]

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