EN8 Carbon steel is a medium carbon steel with 0.36-0.44% C as per BS 970 standard. It has moderate tensile strength between 500-800Mpa.It is generally supplied in untreated condition or in the normalized condition.EN8 can be hardened by quenching and tempering on limited sections,and also can be flame or induction hardened to produce a good surface hardness(50-55HRC) with moderate wear resistance.EN8 steel can be easily machined in any condition,and can be welded using suitable welding techniques with the correct procedure.
1.EN8 steel Supply Form & Size
Hot rolled round bar:Φ20-Φ200mm,Length:3000-6000mm
Hot Forged round bar:Φ80-Φ1000mm,Length:3000-10000mm
Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm
|Surface Finish||Black-Forged||Black-Rolled||Turned||Grinding||Polished||Peeled||Cold Drawn|
|Tolerance||(0，+5mm)||(0，+1mm)||(0，+3mm)||Best h9||Best h11||Best H11||Best H11|
|EN8/080M40||0.36-0.44||0.1-0.4||0.60-1.0||≤ 0.05||≤ 0.05|
|EN8D/080A42||0.4-0.45||0.1-0.4||0.7-0.9||≤ 0.05||≤ 0.05|
|EN8M/212A42||0.4-0.45||≤ 0.25||1.0-1.3||≤ 0.06||0.12-0.2|
|Yield Strength,Mpa||≥ 245||≥385||≥465|
|ISO V Impact,J||20||33||33|
6.EN8 steel Forging
Forging temperature:950-1050℃,EN8 steel should be cooled as slowly as possible in still air or in sand after forged.
The normalizing temperature range for this grade is typically 830-860ºC,followed by cooling in still air.
Heat slowly to 680-710°C, soak well. Cool slowly in the furnace.
Hardening of this grade is carried out from an austenitizing temperature of 820-860ºC followed by oil or water quenching.
Carbon steel EN8 or 080m40 can be tempered at a heat of between 550°C to 660°C,heating for about 1 hour for every inch of thickness, then cool in oil or water.
EN8 is a popular steel in industry from the automotive trade to wider general engineering applications,it is widely used for many general engineering applications.