Q550 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q550

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GBT Q550

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This page is mainly introduced the Q550 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q550,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q550
  • Steel Garde:Q550
  • Type:Special Alloy
  • Country:China
  • Standard:GBT
  • Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material Standard Country
Q550 GBT China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 090~867 σb/MPa
Yield Strength 633 σ 0.2 ≥/MPa
Elongation 96 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 999~812 -
HRC 30 -

Physical Properties

Thermal expansion 08-66 e-6/K
Thermal conductivity 88-31 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 6785-6018 째C
Density 9715-6628 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
Q550 Special Alloy Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download

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