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SKS21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKS21

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JIS SKS21

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This page is mainly introduced the SKS21 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKS21,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SKS21

Steel Garde:SKS21
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Alloy tool steel - Tool steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	122～391	σb/MPa
Yield Strength	241	σ 0.2 ≥/MPa
Elongation	85	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	053～271	-
HRC	30	-

Physical Properties

Thermal expansion	31-53	e-6/K
Thermal conductivity	99-48	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7993-6275	째C
Density	8182-6784	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)
SKS21 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