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GBT Q550

Q550


Q550 material is China structural steel and alloy steel.

Chemical composition of Q550, Q550 mechanical properties, Q550 datasheet, Q550 equivalent grade, Heat treatment and temperature process of Q550.


Q550 property sheet

Q550 Spec.

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Chemical Composition of Q550

C Max 0.18
Si Max 0.55
Mn 1.00-1.60
P 0.03
S 0.03
Cr Max 0.60
Ni Max 1.00
Mo Max 0.40
B Max 0.003

Mechanical Properties of Q550

Rp0.2 (MPa) 992 (≥)
Rm (MPa) 422 (≥)
AKV (J) 31
A (%) 42
Z (%) 23
Hardness HBW 323

Q550 shape and dimensions

Q550 Round bar: 1mm-800mm
Q550 Square bar: 10mm * 10mm-600mm *600mm
Q550 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
Q550 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
Q550 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
Q550 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

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