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Description

USA ASTM Grade2 Steel Castings Suitable for Pressure Service and Grade2 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: Grade2
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Grade2 ASTM USA Steel Castings Suitable for Pressure Service
4130
4140
4330
4340
4620
6150
8620
8630
52100
Grade1

Chemical composition(mass fraction)(wt.%) of the Grade2

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.3 0.8 1.00-1.40 0.04 0.045 0.10-0.30

Mechanical Properties of steel grade Grade2

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)
212 (≥) 493 (≥) 14 34 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade Grade2

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
24 - -     0.34 -  
728 185 - 32.3 434   -  
859 - 22 33.2   131 434

Heat Treatment of steel grade Grade2

Heat treated : 1634°C - 1173°C

Technological Curves of steel grade Grade2

Cross Reference Table (Equivalent Grade) of Grade2

Grade Standard Country Application
Grade2 GBT USA
Grade21 AISI USA
Grade21 ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Grade2 ASTM USA Steel Castings Suitable for Pressure Service
Grade21 ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Grade2 ASTM USA Steel Castings Suitable for Pressure Service

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