SAE J438b Grade D7

Equivalent material: DIN 1.2380, DIN X220CrVMo13-4, AFNOR Z230CVA12.04, BS BD7, AISI D7, EN 1.2380, GOST KH12MF4, UNS T30407

SAE J438b Grade D7 general

Property Temperature Value Comment
Density 23.0 °C Density of 7.72 - 8 g/cm³ Typical for Tool And Machining Steel

SAE J438b Grade D7 thermal

Property Temperature Value Comment
Coefficient of thermal expansion 23.0 °C Coefficient of thermal expansion of 1E-5 - 1.3E-5 1/K Typical for Tool And Machining Steel
Melting point - Melting point of 1370 - 1425 °C Typical for Tool And Machining Steel
Specific heat capacity 23.0 °C Specific heat capacity of 420 - 460 J/(kg·K) Typical for Tool And Machining Steel
Thermal conductivity 23.0 °C Thermal conductivity of 17 - 42 W/(m·K) Typical for Tool And Machining Steel

SAE J438b Grade D7 chemical

Property Value
Carbon Carbon of 2.15 - 2.5 %
Chromium Chromium of 11.5 - 13.5 %
Manganese Manganese of 0.3 - 0.5 %
Molybdenum Molybdenum of 0.7 - 1.2 %
Silicon Silicon of 0.3 - 0.5 %
Vanadium Vanadium of 3.8 - 4.4 %

SAE J438b Grade D7 mechanical

Property Temperature Value Comment
Elastic modulus 23.0 °C Elastic modulus of 203 - 211 GPa Typical for Tool And Machining Steel
Poisson's ratio 23.0 °C Poisson's ratio of 0.3 [-] Typical for Tool And Machining Steel
Shear modulus 23.0 °C Shear modulus of 79 GPa Typical for Tool And Machining Steel

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