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SKD4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKD4

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JIS SKD4

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This page is mainly introduced the SKD4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SKD4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SKD4

Steel Garde:SKD4
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Hot-work die steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	856～321	σb/MPa
Yield Strength	757	σ 0.2 ≥/MPa
Elongation	04	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	347～847	-
HRC	30	-

Physical Properties

Thermal expansion	50-78	e-6/K
Thermal conductivity	65-65	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7683-5029	째C
Density	9218-7484	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)
SKD4 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