EN9 is a medium carbon steel grade commonly supplied in rolled condition. It can be flame or induction hardened to produce a high surface hardness with excellent wear resistance for a carbon steel grade. EN9 is used commonly for many general engineering applications. Typical applications include, shafts, axes, knives, bushes, crankshafts, screws, sickles, wood working drills and hammers.
- High quality alloy steel
- Good ductility and shock resistance
- Good wear resistance
- Can be induction hardened
En9 is a plain unalloyed medium-carbon steel. It therefore requires very severe cooling in the heat treatment cycle in order to get the sort of hardness that you want, and the thickness of the section in turn greatly affects the cooling rate that can be achieved. Heat slowly to 820-840Â°C and allow it to be heated through. Quench in oil, brine or water.
Temper the EN9 steel component immediately after quenching whilst still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air. For most applications tempering of EN9 will be between 550-660Â°C.
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