SKH51 Steel China Supplier and stockholders. Otai Special Steel is supplier of SKH51 in round bar, Plate, Flat, Square. JIS SKH51 Tool Steel is Chrome, Molybdenum Alloy high speed steel. Normal use in cutting tool steel, die tool.  Delivery condition is Annealing or As customer requirement.  HSS

JIS SKH51 Tool Steel

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Chemical Composition of JIS SKH51 Tool Steel
Grade NO. C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Mo(%) V(%) W(%)
M2 0.78～0.88 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.75～4.50 4.50～5.50 1.75～2.20 5.50～6.75
1.3343 0.86～0.94 ≤0.45 ≤0.40 ≤0.030 ≤0.030 3.80～4.50 4.70～5.20 1.70～2.00 6.00～6.70
SKH51 0.80～0.88 ≤0.45 ≤0.40 ≤0.030 ≤0.030 3.80～4.50 4.70～5.20 1.70～2.10 5.90～6.70
W6M5Cr4V2 0.80～0.90 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.80～4.40 4.50～5.50 1.75～2.20 5.50～6.75

HSS JIS SKH51 Steel Equivalents with AISI M2, DIN 1.3343, GB W6M5Cr4V2.

Application of High Speed Steel JIS SKH51

JIS SKH51 tool steel have good hot-hardness and high quenching hardness. Its others name have Wind steel or Sharp steel, mean even quenching cooling in air can be hardened, and very sharp.  Normal use in Tool, Forging industry, Screw industry, etc.

Tool industry: scraper, hob cutter, milling cutter, drill bit, etc.
Forging industry: forging die
Screw industry: six screw angle shaping die, tooth tapping, punch

Heat treament of Tool Steel JIS SKH51 HSS

JIS SKH51 High Speed Tool steel include Annealing, Quenching, Tempering, Hardening, Stress Relieving. Nitridation and so on. Different usage make different heat treatment.  Typical Heat Treatment data as below:

  • Grade: SKH51
  • Hot working temperature / C: 1150
  • Hot working temperature / C: 950
  • Annealing temperature / C: 880 ~ 800
  • After annealing, the hardness of HRC: is less than or equal to 262
  • Quenching temperature / C: 1220
  • Quenching medium: Oil
  • Temper temperature: 560
  • After quenching hardness HRC: = 64
Mechanical Properties of SKH51 Speed Steel

JIS SKH51 High Speed Steel Typical Mechanical Properties as below table:

  • Poisson’s ratio: 0.27-0.30
  • Elastic modulus: 190GPa-210GPa
  • Compressive yield strength:  3250 MPa at 149 °C

 

Physical Properties of Hss SKH51 tool Steel
  • Density: 8.16kg /cm at Room Temperature
  • Melting point: 4680°C
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Email: jack@otaisteel.com