EN8 is an unalloyed medium carbon steel with good tensile strength. It is normally supplied in cold drawn or as rolled. Tensile properties can vary but are usually between 500-800 N/mm2.
TYPICAL ANALYSIS
C.
Si.
Mn.
S.
P.
0.40%
0.25%
0.80%
0.05%
0.05%
Hardening: Heat uniformly to 830/860°C until heated through. Quench in oil or water. Can also be induction or flame hardened.
Tempering: Heat uniformly and thoroughly at the selected tempering temperatures, between 550°C to 660°C and hold at heat for one hour per inch of total thickness.
Normalising: Normalise at 830-860°C, and cool in air.