JIS G4051 S40C Introduce

Steel is used widely in industry for its strength, durability and relatively low cost. Tensile strength is the amount of force needed to pull a material until it separates. The tensile strength of JIS G4051 S40C steel varies based on the alloy grade and the tempering process used. Impact strength is the amount of force needed to cause permanent deformation in a material. Hardness is a measure of a material's resistance to indentation and is usually measured using the Rockwell or Vickers test.

Smelting temperature:1244°C - 1434°C

Application:Carbon steel for mechanical structure

JIS G4051 S40C Material Mechanical Properties

The mechanical properties of the JIS G4051 S40C steel are as follows:

YieldRp0.2 ≤ 527 (MPa)
TeileRm≤ 898 (MPa)
ImpactKV/Ku33(J)
ElongationA23%
Reduction in cross section on fractureZ14%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)112

JIS G4051 S40C Material Thermal Properties

The thermal performance parameters of the JIS G4051 S40C steel are as follows:

Temperature (°C)42459755
Modulus of elasticity (GPa)-284-
Mean coefficient of thermal expaion ×10-6/(°C)--32
Thermal conductivity (W/m·°C)-24.331.2
Specific thermal capacity (J/kg·°C)-422-
Specific electrical resistivity (Ω mm²/m)0.13--
Deity (kg/dm³)--432
Poisson’s coefficient, ν--321