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Romania STAS OL70k Structural steel for general purpose and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: OL70k / OL 70 k
Category Grade Standard Region/Area Standard Content
Metals OL 70 k STAS 500-2 Romania Structural steel for general purpose

Chemical composition(mass fraction)(wt.%) of the OL 70 k

Element Min Max Similar
Si - 0.4000 -
S - 0.0500 -
P - 0.0500 -
Mn - 0.8000 -
C - 0.5000 -

Mechanical Properties of steel grade OL 70 k

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)
732 (≥) 534 (≥) 33 43 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade OL 70 k

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 - -     0.12 -  
485 311 - 14.3 413   -  
925 - 42 23.2   214 134

Heat Treatment of steel grade OL 70 k

Heat treated : 1163°C - 1843°C

Technological Curves of steel grade OL 70 k

Cross Reference Table (Equivalent Grade) of OL 70 k

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