EN8M
EN8M Grade Introduction:
EN8M carbon steel (212M36) is a through hardening carbon manganese free-cutting steel, usually supplied untreated. This steel has good tensile strength. So it is often used in gears, shafts, stressed pins, studs, bolts, keys, etc.EN8M carbon steel is a free-machining grade and is readily machinable in any condition. It can be further surface-hardened to produce components with enhanced wear resistance, typically to 50-55 HRC through induction processes. It is a free-cutting version of EN8M carbon steel made for easy machining.
EN8M Grade Application:
- gears
- shafts
- Stressed pins
- studs
- Bolts
- Keys
EN8M Equivalent Grades:
| Country |
Standard |
| USA |
ASTM&AISI&SAE 1345 |
| Japanese |
JIS SMnC443 |
| Germany |
DIN EN8M |
| British |
BS EN8M |
| France |
NF EN8M |
| International |
ISO — |
| Chinese |
GB 45Mn2 |
EN8M Chemical Composition:
| Element |
Content (%) |
| C |
0.35 – 0.45 |
| Si |
0.25 |
| Mn |
1.00 – 1.30 |
| S |
0.12 – 0.20 |
| P |
0.060 Max |
Mechanical Properties:
| Property |
Value |
| Max Stress |
700-850 n/mm² (up to 19mm LRS) |
| Yield Stress |
495 n/mm² Min (12% if cold-drawn) |
| Elongation |
16% Min (up to 19mm LRS) |
| Impact KCV |
28 Joules Min |
| Hardness |
201-255 Brinell |
| Charpy V-Notch Impact (J/minimum) |
28 |