SKS 4

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#SKS #4

Description

SKS 4 Tool Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel: SKS 4

Category	Type	Steel Grade
Steel Grades	Tool Steel	SKS 4
		SK7
		SK60
		SKS 11
		SKS 2
		SKS 21
		SKS 5
		SKS 51
		SKS 7
		SKS 81
		SKS 8

Chemical composition(mass fraction)(wt.%) of the SKS 4

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.45-0.55	0.35	0.5	0.03	0.03	0.5-1.0	≤0.25
Mo	Al	Cu	Nb	Ti	V	Ce
		≤0.25
N	Co	Pb	W	Other
			0.5-1.0

Mechanical Properties of steel grade SKS 4

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
796 (≥)	757 (≥)	44	31	21	Solution and Aging, Annealing, Ausaging, Q+T,etc	331

Physical Properties of steel grade SKS 4

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
22	-	-			0.22	-
772	922	-	12.3	333		-
512	-	41	23.2			222	334

Heat Treatment of steel grade SKS 4

Heat treated : 1378°C - 1558°C

Technological Curves of steel grade SKS 4

No Curve

Cross Reference Table (Equivalent Grade) of SKS 4

Grade	Standard	Country	Application
SKS11	JIS	Japan	Alloy tool steel - Tool steel
SKS2	JIS	Japan	Alloy tool steel - Tool steel
SKS21	JIS	Japan	Alloy tool steel - Tool steel
SKS5	JIS	Japan	Alloy tool steel - Tool steel
SKS51	JIS	Japan	Alloy tool steel - Tool steel
SKS7	JIS	Japan	Alloy tool steel - Tool steel
SKS81	JIS	Japan	Alloy tool steel - Tool steel
SKS8	JIS	Japan	Alloy tool steel - Tool steel
SKS4	JIS	Japan	shock-resistant steel
SKS41	JIS	Japan	shock-resistant steel
SKS43	JIS	Japan	shock-resistant steel
SKS44	JIS	Japan	shock-resistant steel
SKS3	JIS	Japan	Cold Work Die Steel
SKS31	JIS	Japan	Cold Work Die Steel
SKS93	JIS	Japan	Cold Work Die Steel
SKS94	JIS	Japan	Cold Work Die Steel
SKS95	JIS	Japan	Cold Work Die Steel
SKS2M	JIS	Japan	Cold rolled special steel strip
SKS5M	JIS	Japan	Cold rolled special steel strip
SKS7M	JIS	Japan	Cold rolled special steel strip

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