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Description

Romania STAS/SR OLC75A Alloy structural steel and OLC75A Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: OLC75A
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel OLC75A STAS/SR Romania Alloy structural steel
40Sil7A
51Sil7A
SIVCr11A
56Sil7A
60CrMnSi12A
60Si15A
65WSil8A
OLC55A
OIX65A
OLC70A

Chemical composition(mass fraction)(wt.%) of the OLC75A

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
0.70 -0.80 0.17-0.37 0.50-0.80 0.04 0.04 0.3 0.3 0.25

Mechanical Properties of steel grade OLC75A

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)
542 (≥) 793 (≥) 21 22 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade OLC75A

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
12 - -     0.24 -  
317 292 - 44.3 124   -  
268 - 14 43.2   423 313

Heat Treatment of steel grade OLC75A

Heat treated : 1173°C - 1261°C

Technological Curves of steel grade OLC75A

Cross Reference Table (Equivalent Grade) of OLC75A

Grade Standard Country Application
OLC75A STAS/SR Romania Alloy structural steel

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