... ,MOQ 10MT, Delivery:10-40 days. Quality service after sales High-speed Tool Steel1.Diameter: 20-200 mm, ≥200 mm2.Classification: ... 401.75-2.205.50-6.754.50-5.50-M3, SKH521.00-1.100.15-0.40≤0.030≤0 ... 502.25-2.755.00-6.754.75-6.50-M3, SKH531.15-1.250.15-0.40≤0.030≤0 ... .95-1.351.15-1.859.00-10.007.75-8.75M7,SKH580.97-1.050.15-0.4.≤0.030 ... .001.75-2.251.40-2.108.20-9.20- High speed Tool Steel ASTM M3 / SKH52