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

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GBT 20R

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This page is mainly introduced the 20R chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 20R,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
20R

Steel Garde:20R
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
1020rW6	UNE	Spain
320rMnCoV12	UNE	Spain
320rMoCoV12	UNE	Spain

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	974～453	σb/MPa
Yield Strength	665	σ 0.2 ≥/MPa
Elongation	85	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	119～178	-
HRC	30	-

Physical Properties

Thermal expansion	67-02	e-6/K
Thermal conductivity	73-51	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6694-7304	째C
Density	0602-6946	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)
20R 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