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GBT GB 70

GB 70


GB 70 material is China structural steel and alloy steel.

Chemical composition of GB 70, GB 70 mechanical properties, GB 70 datasheet, GB 70 equivalent grade, Heat treatment and temperature process of GB 70.

  • Tags: 70,

GB 70 property sheet

GB 70 Spec.

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Chemical Composition of GB 70

C 0.62-0.70
Si 0.17-0.37
Mn 0.50-0.80
P 0.035
S 0.035
Cr Max 0.25
Ni Max 0.25

Mechanical Properties of GB 70

Rp0.2 (MPa) 376 (≥)
Rm (MPa) 485 (≥)
AKV (J) 33
A (%) 11
Z (%) 14
Hardness HBW 341

GB 70 shape and dimensions

GB 70 Round bar: 1mm-800mm
GB 70 Square bar: 10mm * 10mm-600mm *600mm
GB 70 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
GB 70 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
GB 70 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
GB 70 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

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