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SKH55 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKH55

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JIS SKH55

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This page is mainly introduced the SKH55 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKH55,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SKH55

Steel Garde:SKH55
Type:Special Alloy
Country:Japan
Standard:JIS
Application:W-phase system high-speed tool steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	496～303	σb/MPa
Yield Strength	789	σ 0.2 ≥/MPa
Elongation	96	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	485～371	-
HRC	30	-

Physical Properties

Thermal expansion	49-76	e-6/K
Thermal conductivity	79-48	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8156-1606	째C
Density	6863-8937	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)
SKH55 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