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Germany DIN St30Si Seamless precision steel tubes - Part 2: Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: St30Si / St 30 Si
Category Grade Standard Region/Area Standard Content
Metals St 30 Si DIN 2391-2 Germany Seamless precision steel tubes - Part 2: Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the St 30 Si

Element Min Max Similar

Mechanical Properties of steel grade St 30 Si

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)
657 (≥) 268 (≥) 43 32 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical Properties of steel grade St 30 Si

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
34 - -     0.34 -  
732 999 - 34.3 121   -  
127 - 44 34.2   412 411

Heat Treatment of steel grade St 30 Si

Heat treated : 1141°C - 1549°C

Technological Curves of steel grade St 30 Si

Cross Reference Table (Equivalent Grade) of St 30 Si

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