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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