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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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GBT 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 - Chinese GB standard of internal combustion engine valve steel bar (GB/T 12773-1991)

Steel Garde:4Cr9Si2
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	515～706	σb/MPa
Yield Strength	242	σ 0.2 ≥/MPa
Elongation	27	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	648～047	-
HRC	30	-

Physical Properties

Thermal expansion	38-44	e-6/K
Thermal conductivity	44-43	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0614-6504	째C
Density	9547-9134	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 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