W302 Austrian "Bai Lu" hot work tool steel.

Steel characteristics: a high-temperature wear resistance of thermal strength. Polishing and cutting easy, surface nitriding, spark machining. Uses: suitable for a variety of heat applications such as die-casting mold, heat or metal alloy extrusion die, nozzle, fire extinguishers, hot scissors, plastic mold, and so on. Factory state: soft melted down to HB235 (highest)


Features Applications: steel clean uniform, well-structured, with 3000-6000 tons of pressure


Cross forging, impact strength, ultrasonic testing, high material utilization, and reduce processing costs, the best of the red hot hardness, high strength and toughness. Can be prepared


Zinc \ Al \ lead \ tin alloy or copper alloy die-casting mold, squirt nozzle, squeeze the axis, etc., used as a hammer or hot red hot mold, the hardened after a permanent production of plastic mold.

Forging: 1100 ℃ to 900 ℃ began forging furnace cooled with recycled


:750-800 ℃ thermal annealing furnace after cooling, up to hardness of 235HB (highest).


Quenching: the 1020-1080 ℃ oil or air cooling, tempering must be approaching 60-80 ℃ immediately.


Tempering: The first fire of about 500 ℃ in order to obtain maximum hardness of the second hardening; second tempering is equal to 500 ℃ in order to achieve the required hardness; third tempering temperature is slightly lower than the former temperature (about 30 ℃).

W302 chemical composition:

       C C 0.40,

       Cr Cr 5.00,


Mn Mn 0.40,


Mo-Mo 1.30,


V V 1.10,


Si Silicon 1.00