- EN9 is used commonly for many general engineering applications.
- Typical applications include, shafts, axes, knives, bushes, crankshafts, screws, sickles, wood working drills and hammers.
Heat the steel slowly to 680-710°C, soak well.
Cool slowly in the furnace.
- Heat slowly to 820-840°C, soak well.
- Cool slowly in the furnace.
- 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 550-660°C.
- Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each EN9 steel component.
- Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
- Please consult your heat treatment provider for full guidance on heat treatment of EN9 carbon steel.
|Condition||Tensile N/mm²||Yield N/mm²||Elongation %||Hardness Brinell|
|Normal||600/700 MPa||310 MPa||13.00%||201-255|
|R||690/850 MPa||415 MPa||14.00%||201-255|
|S||770/930 MPa||480 MPa||14.00%||223/277|
|T||850/1000 MPa||570 MPa||12.00%||248/3|