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25 Ch 2 N 4 MA

Bulgaria BDS 25Ch2N4MA Alloyed constructional steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25Ch2N4MA / 25 Ch 2 N 4 MA
Category Grade Standard Region/Area Standard Content
Metals 25 Ch 2 N 4 MA BDS 6354 Bulgaria Alloyed constructional steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 25 Ch 2 N 4 MA

Element Min Max Similar

Mechanical Properties of steel grade 25 Ch 2 N 4 MA

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)
637 (≥) 742 (≥) 32 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade 25 Ch 2 N 4 MA

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 - -     0.21 -  
256 517 - 12.3 232   -  
574 - 43 34.2   331 231

Heat Treatment of steel grade 25 Ch 2 N 4 MA

Heat treated : 1945°C - 1321°C

Technological Curves of steel grade 25 Ch 2 N 4 MA

Cross Reference Table (Equivalent Grade) of 25 Ch 2 N 4 MA

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