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A70204

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A30424 A70284
#A70204

Description

China GBT A70204 China structural steel and alloy steel and A70204 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: A70204
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel A70204 GBT China China structural steel and alloy steel
U40452
L20158
U41252
U41302
U41352
A20374
A20404
A30304
A30354
A30424

Chemical composition(mass fraction)(wt.%) of the A70204

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) B(%) Al(%)
0.17-0.24 Max 0.40 0.50-0.80 0.035 0.035 — 0.0005-0.0035 0.02

Mechanical Properties of steel grade A70204

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)
299 (≥) 125 (≥) 14 32 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade A70204

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
31 - -     0.42 -  
571 525 - 21.3 123   -  
157 - 43 13.2   331 422

Heat Treatment of steel grade A70204

Heat treated : 1466°C - 1431°C

Technological Curves of steel grade A70204

Cross Reference Table (Equivalent Grade) of A70204

Grade Standard Country Application
A70204 GBT China China structural steel and alloy steel
A30424 A70284
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Jiangyou Longhai Special Steel Co.,Ltd.
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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