SKH 4

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Japan JIS SKH4 高速工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKH4 / SKH 4

Category	Grade	Standard	Region/Area	Standard Content
Metals	SKH 4	JIS G4403	Japan	高速工具鋼鋼料

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

Element	Min	Max	Similar
W	17.0000	19.0000	-
V	1.0000	1.5000	-
Si	-	0.4500	-
S	-	0.0300	-
P	-	0.0300	-
Mn	-	0.4000	-
Cu	-	0.2500	-
Cr	3.8000	4.5000	-
Co	9.0000	11.0000	-
C	0.7300	0.8300	-

Mechanical Properties of steel grade SKH 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)
249 (≥)	944 (≥)	31	34	14	Solution and Aging, Annealing, Ausaging, Q+T,etc	123

Physical Properties of steel grade SKH 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
42	-	-			0.23	-
991	465	-	11.3	223		-
468	-	31	12.2			113	423

Heat Treatment of steel grade SKH 4

Heat treated : 1875°C - 1285°C

Technological Curves of steel grade SKH 4

No Curve

Cross Reference Table (Equivalent Grade) of SKH 4

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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