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Bulgaria BDS 20ChGSA Alloyed constructional steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20ChGSA / 20 ChGSA
Category Grade Standard Region/Area Standard Content
Metals 20 ChGSA BDS 6354 Bulgaria Alloyed constructional steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 20 ChGSA

Element Min Max Similar

Mechanical Properties of steel grade 20 ChGSA

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)
741 (≥) 688 (≥) 11 31 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade 20 ChGSA

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
23 - -     0.22 -  
458 553 - 14.3 141   -  
764 - 34 42.2   222 323

Heat Treatment of steel grade 20 ChGSA

Heat treated : 1264°C - 1127°C

Technological Curves of steel grade 20 ChGSA

Cross Reference Table (Equivalent Grade) of 20 ChGSA

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