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Germany DIN 38Si7 Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 38Si7 / 38Si7
Category Grade Standard Region/Area Standard Content
Metals 38Si7 DIN 17221 Germany Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 38Si7

Element Min Max Similar
Si 1.5000 1.8000 -
S - 0.0450 -
P - 0.0450 -
Mn 0.5000 0.8000 -
C 0.3500 0.4200 -
Si 1.5000 1.8000 -
S - 0.0250 -
P - 0.0250 -
Mn 0.5000 0.8000 -
Cu+Sn - - -
C 0.3500 0.4200 -
Si 1.5000 1.8000 -
S - 0.0300 -
P - 0.0300 -
Mn 0.5000 0.8000 -
C 0.3500 0.4200 -

Mechanical Properties of steel grade 38Si7

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)
994 (≥) 757 (≥) 34 14 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade 38Si7

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
13 - -     0.34 -  
187 368 - 43.3 334   -  
768 - 43 44.2   222 323

Heat Treatment of steel grade 38Si7

Heat treated : 1282°C - 1949°C

Technological Curves of steel grade 38Si7

Cross Reference Table (Equivalent Grade) of 38Si7

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