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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	256～105	σb/MPa
Yield Strength	350	σ 0.2 ≥/MPa
Elongation	41	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	963～936	-
HRC	30	-

Physical Properties

Thermal expansion	21-94	e-6/K
Thermal conductivity	56-58	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9990-5528	째C
Density	7594-4523	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