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Grade31

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Grade21 1A
#Grade31

Description

USA ASTM Grade31 Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures and Grade31 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: Grade31
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Grade31 ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
J03500
J02500
J03000
J03001
J03501
J02501
Gr 485
Gr 620
Gr 825
Grade21

Chemical composition(mass fraction)(wt.%) of the Grade31

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) W(%) Co(%) B(%) Fe(%)
0.45-0.55 1 1 0.04 0.04 24.5-26.5 9.50-11.5 7.00-8.00 Bal 0.005-0.015 ≤2.00

Mechanical Properties of steel grade Grade31

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)
454 (≥) 718 (≥) 13 33 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade Grade31

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 - -     0.12 -  
495 341 - 43.3 242   -  
825 - 24 43.2   432 431

Heat Treatment of steel grade Grade31

Heat treated : 1485°C - 1842°C

Technological Curves of steel grade Grade31

Cross Reference Table (Equivalent Grade) of Grade31

Grade Standard Country Application
Grade31 AISI USA
Grade31 ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Grade31 ASTM USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Grade21 1A
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Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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