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4Cr9Si2 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 4Cr9Si2

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GB 4Cr9Si2

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This page is mainly introduced the 4Cr9Si2 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 4Cr9Si2,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
4Cr9Si2

Steel Garde:4Cr9Si2
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
3	JB/T 6398 (2006)	Heavy stainless acid resistant and heat resistant steel forgings

Metallographic Structure:Martensite
Application:Valve steel bars for internal combustion engines - Technical requirements

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.35	0.50
Si	2.00	3.00
Mn		0.70
P		0.035
S		0.030
Ni		0.60
Cr	8.00	10.00

Mechanical Properties

Tensile strength	184～416	σb/MPa
Yield Strength	719	σ 0.2 ≥/MPa
Elongation	66	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	302～535	-
HRC	30	-

Physical Properties

Thermal expansion	62-33	e-6/K
Thermal conductivity	22-79	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9590-5725	째C
Density	6540-6175	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)
4Cr9Si2 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