EN9 Carbon steel is a medium carbon steel with 0.5-0.6% C as per BS 970 standard.It is also known as 070M55 with tensile strength between 500-800Mpa.EN9 steel is generally supplied in untreated condition or in the normalized condition.This material can be flame or induction hardened to produce a high surface hardness with excellent wear resistance .When hardened and tempered, it develops a tensile strength in the range 700-1000 N/mm depending on ruling section.
1.EN9 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|
|EN9/070M55||0.5-0.6||0.50-0.9||≤ 0.05||≤ 0.05||0.1-0.4|
6.EN9 steel Forging
Forging temperature:850-1100℃,EN9 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 820-880ºC,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 820-850ºC followed by oil or water quenching.
Carbon steel EN9 or 070M55 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.
EN9 steel is suitable for engineering applications which require higher strength and wear resistance.Typical applications include:shafts, axes, knives, bushes, crankshafts, screws, sprockets ,springs, cylinders, cams,sickles, wood working drills,small gears, machine tools, keys and hammers.