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Description

China GBT U21302 China structural steel and alloy steel and U21302 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: U21302
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel U21302 GBT China China structural steel and alloy steel
U20552
U20602
U20652
U20702
U20752
U20802
U20852
U21152
U21202
U21252

Chemical composition(mass fraction)(wt.%) of the U21302

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
0.27-0.34 0.17-0.37 0.70-1.00 0.035 0.035 0.25 0.3 0.25

Mechanical Properties of steel grade U21302

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)
154 (≥) 281 (≥) 31 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade U21302

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 - -     0.22 -  
469 794 - 34.3 113   -  
295 - 21 43.2   144 231

Heat Treatment of steel grade U21302

Heat treated : 1432°C - 1175°C

Technological Curves of steel grade U21302

Cross Reference Table (Equivalent Grade) of U21302

Grade Standard Country Application
U21302 GBT China China structural steel and alloy steel

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