For Tools with Good Resistance to Impact and Softening
Forging Dies
Punches
Chisels
Hammer
Hot Heading Dies
Gripper Dies
Shear Blades
Properties
High Impact Resistance
Excellent Toughness at high Strength levels
Good Wear Resistance
High Hardenability & Softening Resistance
Heat Treatment
Annealing—Heating slowly and uniformly to 815~845℃, furnace cooling to 510℃ at a rate 8~15℃/hr. Hardness max. HB 229
Stress Relieving — Warming to 650℃, furnace cooling.
Hardening—
Preheating: Warming to approx. 650~700℃, holding 20 minutes per 25 mm.
Austenitizing: Heating to approx. 925~960℃, holding 20 minutes per 25 mm.
Quenchant: By oil
Tempering—150~200℃, holding 30 minutes per 25 mm. Air-cooling.
Hardness min. HRC 56
