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England B.S. 2520H Specification for chromium and chromium-nickel steel electrodes for manual metal-arc welding and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 2520H / 25 20 H
Category Grade Standard Region/Area Standard Content
Metals 25 20 H BS 2926 England Specification for chromium and chromium-nickel steel electrodes for manual metal-arc welding

Chemical composition(mass fraction)(wt.%) of the 25 20 H

Element Min Max Similar

Mechanical Properties of steel grade 25 20 H

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)
386 (≥) 616 (≥) 43 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade 25 20 H

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 - -     0.34 -  
932 221 - 22.3 321   -  
823 - 31 31.2   343 132

Heat Treatment of steel grade 25 20 H

Heat treated : 1861°C - 1568°C

Technological Curves of steel grade 25 20 H

Cross Reference Table (Equivalent Grade) of 25 20 H

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