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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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GB 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

Steel Garde:8Cr20Si2Ni
Type:Stainless Steels
Country:China
Standard:GB

Standard Number:

ITEM	Standard Number	Descriptions
1	GB/T 1221 (1992)	Heat-resisting steel bars
2	GB/T 12773 (1991)	Valve steel bars for internal combustion engines - Technical requirements

Metallographic Structure:Martensite
Application:Heat-resisting steel bars

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.75	0.85
Si	1.75	2.25
Mn	0.20	0.60
P		0.035
S		0.030
Ni	1.15	1.65
Cr	19.00	20.50

Mechanical Properties

Tensile strength	479～473	σb/MPa
Yield Strength	821	σ 0.2 ≥/MPa
Elongation	53	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	646～278	-
HRC	30	-

Physical Properties

Thermal expansion	46-97	e-6/K
Thermal conductivity	01-15	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8908-3395	째C
Density	8642-5186	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 Stainless Steels	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