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Grade4

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Description

USA ASTM Grade4 Steel Castings Suitable for Pressure Service and Grade4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: Grade4
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Grade4 ASTM USA Steel Castings Suitable for Pressure Service
4140
4330
4340
4620
6150
8620
8630
52100
Grade1
Grade2

Chemical composition(mass fraction)(wt.%) of the Grade4

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.3 0.8 ≤1.00 0.04 0.045 0.40-0.80 0.40-0.80 0.15-0.30

Mechanical Properties of steel grade Grade4

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)
793 (≥) 438 (≥) 34 33 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade Grade4

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 - -     0.34 -  
713 731 - 31.3 231   -  
985 - 23 34.2   424 112

Heat Treatment of steel grade Grade4

Heat treated : 1293°C - 1912°C

Technological Curves of steel grade Grade4

Cross Reference Table (Equivalent Grade) of Grade4

Grade Standard Country Application
Grade4 ASTM USA Steel Castings Suitable for Pressure Service
Grade4 ASTM USA Steel Castings Suitable for Pressure Service
Grade2 Grade6
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Jiangyou Longhai Special Steel Co.,Ltd.

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