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Bulgaria BDS 25GST Steel for reinforcement of concrete. Weldable reinforcing steels В235 and В420 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25GST / 25 GST
Category Grade Standard Region/Area Standard Content
Metals 25 GST BDS 4758 Bulgaria Steel for reinforcement of concrete. Weldable reinforcing steels В235 and В420

Chemical composition(mass fraction)(wt.%) of the 25 GST

Element Min Max Similar

Mechanical Properties of steel grade 25 GST

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)
594 (≥) 632 (≥) 14 21 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade 25 GST

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
14 - -     0.22 -  
578 558 - 41.3 214   -  
198 - 21 14.2   243 433

Heat Treatment of steel grade 25 GST

Heat treated : 1224°C - 1266°C

Technological Curves of steel grade 25 GST

Cross Reference Table (Equivalent Grade) of 25 GST

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