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QStE380TM

China 首钢Q/SG QStE380TM 汽车结构用热连轧钢板和钢带 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: QStE380TM / QStE380TM
Category Grade Standard Region/Area Standard Content
Metals QStE380TM Q/SGZGS 315 China 汽车结构用热连轧钢板和钢带

Chemical composition(mass fraction)(wt.%) of the QStE380TM

Element Min Max Similar
C - 0.1200 -
Si - 0.5000 -
Mn - 1.4000 -
P - 0.0250 -
S - 0.0200 -
Alt 0.0150 - -
Nb - 0.0900 -
Ti - 0.2200 -
Nb+Ti+V - 0.2200 -

Mechanical Properties of steel grade QStE380TM

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
796 (≥) 823 (≥) 23 22 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade QStE380TM

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
31 - -     0.42 -  
249 569 - 31.3 112   -  
854 - 22 41.2   322 431

Heat Treatment of steel grade QStE380TM

Heat treated : 1646°C - 1495°C

Technological Curves of steel grade QStE380TM

Cross Reference Table (Equivalent Grade) of QStE380TM

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