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Grade8

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Grade7 Grade9
#Grade8

Description

USA ASTM Grade8 Steel Castings Suitable for Pressure Service and Grade8 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: Grade8
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Grade8 ASTM USA Steel Castings Suitable for Pressure Service
4620
6150
8620
8630
52100
Grade1
Grade2
Grade4
Grade6
Grade7

Chemical composition(mass fraction)(wt.%) of the Grade8

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.05-0.20 0.8 0.50-0.90 0.04 0.045 2.00-2.75 － 0.90-1.10

Mechanical Properties of steel grade Grade8

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)
791 (≥) 827 (≥) 14 12 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade Grade8

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
43 - -     0.24 -  
119 187 - 11.3 324   -  
273 - 23 41.2   343 332

Heat Treatment of steel grade Grade8

Heat treated : 1858°C - 1189°C

Technological Curves of steel grade Grade8

Cross Reference Table (Equivalent Grade) of Grade8

Grade Standard Country Application
Grade8 ASTM USA Steel Castings Suitable for Pressure Service
Grade8 ASTM USA Steel Castings Suitable for Pressure Service
Grade7 Grade9
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Jiangyou Longhai Special Steel Co.,Ltd.

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