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SKH58 Application:W-phase system high-speed tool steel
Category Type Steel grade Standard Country
Grades Special Alloy SKH58 JIS Japan

Chemical composition % of the ladle analysis of grade SKH58

C(%) Si(%) Mn(%) Cr(%) Mo(%) V(%) W(%)
0.95-1.05 Max 0.70 Max 0.40 3.50-4.50 8.20-9.20 1.70-2.20 1.50-2.10
SKH58
Mechanical properties of grade SKH58
Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
422 (≥) 621 (≥) 44 23 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 214
Physical properties of grade SKH58
Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
357 (≥) 183 (≥) 11 33 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 143
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
526 583 326
SKH58 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

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