JIS C2553 M140-30S5 Introduce

JIS C2553 M140-30S5 is a low alloy steel. It contains a small amount of alloying elements, such as Mn and Ni, which can be added to improve the mechanical properties of the steel. Its main ingredients are C and Si, so its welding performance and machinability are good. JIS C2553 M140-30S5 is mainly used for the manufacture of machinery parts, such as gears, shafts, spindles, wheels, some construction machinery, car chassis, and so on. It is also used for boiler and pressure vessel components, tools, agricultural machinery, and shipbuilding steels.

Smelting temperature:1616°C - 1719°C

Application:Fully processed state to deliver cold rolled grain oriented electrical steel strips and sheets

JIS C2553 M140-30S5 Material Mechanical Properties

The mechanical properties of the JIS C2553 M140-30S5 steel are as follows:

YieldRp0.2 ≤ 836 (MPa)
TeileRm≤ 446 (MPa)
ImpactKV/Ku22(J)
ElongationA32%
Reduction in cross section on fractureZ23%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)421

JIS C2553 M140-30S5 Material Thermal Properties

The thermal performance parameters of the JIS C2553 M140-30S5 steel are as follows:

Temperature (°C)43582214
Modulus of elasticity (GPa)-286-
Mean coefficient of thermal expaion ×10-6/(°C)--33
Thermal conductivity (W/m·°C)-41.322.2
Specific thermal capacity (J/kg·°C)-211-
Specific electrical resistivity (Ω mm²/m)0.13--
Deity (kg/dm³)--241
Poisson’s coefficient, ν--422