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18 Ch 2 N 4 MA

Bulgaria BDS 18Ch2N4MA Alloyed constructional steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18Ch2N4MA / 18 Ch 2 N 4 MA
Category Grade Standard Region/Area Standard Content
Metals 18 Ch 2 N 4 MA BDS 6354 Bulgaria Alloyed constructional steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 18 Ch 2 N 4 MA

Element Min Max Similar
W - 0.2000 -
V - 0.0500 -
Ti - 0.0500 -
Si 0.1700 0.3700 -
S - 0.0250 -
P - 0.0250 -
Ni 4.0000 4.4000 -
Mo 0.3000 0.4000 -
Mn 0.2500 0.5500 -
Cu - 0.3000 -
Cr 1.3500 1.6500 -
C 0.1400 0.2000 -

Mechanical Properties of steel grade 18 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)
422 (≥) 616 (≥) 13 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade 18 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
13 - -     0.22 -  
698 991 - 44.3 331   -  
294 - 21 13.2   131 141

Heat Treatment of steel grade 18 Ch 2 N 4 MA

Heat treated : 1364°C - 1762°C

Technological Curves of steel grade 18 Ch 2 N 4 MA

Cross Reference Table (Equivalent Grade) of 18 Ch 2 N 4 MA

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