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

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GBT 20

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

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

Relevant products:

P20 tool steel round bar

NO8020 round bar

NO8020/No8031/N083...

1.2083 Forged Plate

H13(T20813) Tool Steel Flat Bar

422 Stainless Steel Round Bar

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
UNS G10120	UNS	USA
ASTM 1020	ASTM	USA
UNS G10200	UNS	USA
T20811	UNS	USA
T20810	UNS	USA
T20812	UNS	USA
H13	ASTM	USA
T20813	UNS	USA
T20814	UNS	USA
T20819	UNS	USA
T20821	UNS	USA
T20822	UNS	USA
H23	ASTM	USA
T20823	UNS	USA
T20824	UNS	USA
T20825	UNS	USA
T20826	UNS	USA
T20841	UNS	USA
T20842	UNS	USA
T20843	UNS	USA
T12002	UNS	USA
T12004	UNS	USA
T12005	UNS	USA
T12006	UNS	USA
T12008	UNS	USA
T12015	UNS	USA
CPM Rex 20	AISI	USA
Stellite 20
Stellite 2006		USA
Stellite 2012		USA
Stellite SF20		USA
1.1520	DIN	Germany
1.1620	DIN	Germany
1.1820	DIN	Germany
1.2002	DIN	Germany
1.2003	DIN	Germany
1.2004	DIN	Germany
1.2008	DIN	Germany
1.2056	DIN	Germany
1.2057	DIN	Germany
1.2063	DIN	Germany
1.2067	DIN	Germany
1.2080	DIN	Germany
1.2083	DIN	Germany
1.2085	DIN	Germany
200CrMn8	DIN	Germany
1.2201	DIN	Germany
1.2206	DIN	Germany
1.2208	DIN	Germany
1.2203	DIN	Germany

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	866～412	σb/MPa
Yield Strength	473	σ 0.2 ≥/MPa
Elongation	27	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	751～415	-
HRC	30	-

Physical Properties

Thermal expansion	16-78	e-6/K
Thermal conductivity	27-52	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3447-7129	째C
Density	8484-3078	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)
20 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