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8Cr20Si2Ni chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 8Cr20Si2Ni

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GBT 8Cr20Si2Ni

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This page is mainly introduced the 8Cr20Si2Ni chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 8Cr20Si2Ni,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
8Cr20Si2Ni - Chinese GB standard of internal combustion engine valve steel bar (GB/T 12773-1991)

Steel Garde:8Cr20Si2Ni
Type:Special Alloy
Country:China
Standard:GBT
Application:Chinese GB standard of internal combustion engine valve steel bar (GB/T 12773-1991)

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	649～999	σb/MPa
Yield Strength	882	σ 0.2 ≥/MPa
Elongation	76	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	522～758	-
HRC	30	-

Physical Properties

Thermal expansion	82-44	e-6/K
Thermal conductivity	24-57	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2390-1435	째C
Density	5811-8001	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)
8Cr20Si2Ni 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