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A351 Grade CK20

America ASTM A351GradeCK20 容压零件用奥氏体及奥氏体铁素体铸铁的技术规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A351GradeCK20 / A351 Grade CK20
Category Grade Standard Region/Area Standard Content
Metals A351 Grade CK20 ASTM A351/A351M America 容压零件用奥氏体及奥氏体铁素体铸铁的技术规范

Chemical composition(mass fraction)(wt.%) of the A351 Grade CK20

Element Min Max Similar
Si - 1.7500 -
S - 0.0400 -
P - 0.0400 -
Ni 19.0000 22.0000 -
Mo - 0.5000 -
Mn - 1.5000 -
Cr 23.0000 27.0000 -
C 0.0400 0.2000 -

Mechanical Properties of steel grade A351 Grade CK20

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)
544 (≥) 144 (≥) 34 23 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade A351 Grade CK20

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 - -     0.44 -  
979 867 - 44.3 144   -  
249 - 23 32.2   333 213

Heat Treatment of steel grade A351 Grade CK20

Heat treated : 1298°C - 1915°C

Technological Curves of steel grade A351 Grade CK20

Cross Reference Table (Equivalent Grade) of A351 Grade CK20

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