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20 ChMFWL

Bulgaria BDS 20ChMFWL High-temperature steel castings. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20ChMFWL / 20 ChMFWL
Category Grade Standard Region/Area Standard Content
Metals 20 ChMFWL BDS 7478 Bulgaria High-temperature steel castings. Designations and technical requirements

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

Element Min Max Similar
W 0.4000 0.7000 -
V 0.5000 0.7000 -
Si 0.2500 0.5000 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.4000 -
Mo 0.4000 0.6000 -
Mn 0.6000 1.0000 -
Cu - 0.3000 -
Cr 1.0000 1.5000 -
C 0.1200 0.1800 -

Mechanical Properties of steel grade 20 ChMFWL

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)
759 (≥) 849 (≥) 23 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade 20 ChMFWL

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
44 - -     0.41 -  
856 354 - 24.3 421   -  
145 - 12 42.2   121 133

Heat Treatment of steel grade 20 ChMFWL

Heat treated : 1919°C - 1386°C

Technological Curves of steel grade 20 ChMFWL

Cross Reference Table (Equivalent Grade) of 20 ChMFWL

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