En8

Carbon-Steel En8 EN8 is a very popular grade of through-hardening medium carbon steel which is readily machinable in any condition. It is normally supplied in the cold drawn or as rolled condition. EN8 is widely used for applications which require better properties than mild steel but does not justify the costs of an alloy steel. EN8 can be flame or induction hardened to produce a good surface hardness with moderate wear resistance. EN8 is widely used for many general engineering applications. Typical applications include shafts studs bolts connecting rods screws rollers. Key Features An unalloyed carbon steel with reasonable tensile strengthIt can be flame or induction hardenedReadily machinable materialModerate wear resistance.Chemical Composition ELEMENT MIN MAX Carbon 0.35% 0.45 % Manganese 0.60 % 1.00 % Silicon 0.05 % 0.35 % Phosphorous ----- 0.035 % Sulphur ----- 0.035 % Hardening EN8 can be flame or induction hardened to produce a good surface hardness with moderate wear resistance. Heat the component slowly to 820-860C and allow it to be heated through. Quench in oil or water. Tempering Temper the EN8 component immediately after quenching whilst tools are still hand warm. Re-heat the EN8 component 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 EN8 will be between 550-660C.