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SK4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SK4

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CNS SK4

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This page is mainly introduced the SK4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SK4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Steel Garde: SK4
Type:Special Alloy
Country:China
Standard:CNS
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
SK140	JIS	Japan
SK1	JIS	Japan
SK120	JIS	Japan
SK105	JIS	Japan
SK4	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	979～547	σb/MPa
Yield Strength	452	σ 0.2 ≥/MPa
Elongation	27	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	041～538	-
HRC	30	-

Physical Properties

Thermal expansion	37-87	e-6/K
Thermal conductivity	61-46	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4129-9342	째C
Density	2822-8478	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)
SK4 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