20G chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 20G

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GBT 20G

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This page is mainly introduced the 20G chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 20G,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
20G
  • Steel Garde:20G
  • Type:Special Alloy
  • Country:China
  • Standard:GBT
  • Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material Standard Country
20g GBT China
EN S320GP EN Euronorm

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 350~590 σb/MPa
Yield Strength 689 σ 0.2 ≥/MPa
Elongation 17 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 692~113 -
HRC 30 -

Physical Properties

Thermal expansion 55-12 e-6/K
Thermal conductivity 26-37 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 5211-8803 째C
Density 6580-5780 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)
20G 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