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SK70 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SK70

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JIS SK70

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This page is mainly introduced the SK70 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SK70,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SK70

Steel Garde:SK70
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Carbon tool steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	451～440	σb/MPa
Yield Strength	208	σ 0.2 ≥/MPa
Elongation	13	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	164～190	-
HRC	30	-

Physical Properties

Thermal expansion	61-24	e-6/K
Thermal conductivity	09-39	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4072-4422	째C
Density	7761-0642	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)
SK70 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