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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.
Grade Application:
-
Gears
-
Shafts
-
Stressed pins
-
Studs
-
Bolts
-
Keys
Equivalent grades:
USA |
Japanese |
Germany |
British |
France |
International |
Chinese |
---|---|---|---|---|---|---|
ASTM&AISI&SAE |
JIS |
EN DIN |
EN BS |
EN NF |
ISO |
GB |
1345 |
SMnC443 |
EN8M |
EN8M |
EN8M |
—— |
45Mn2 |
Addition to other grades:
MS, EN1a, EN3b, EN8, EN8d, EN9, EN19, EN24, EN31, EN32b, EN36c, EN41b, EN43b, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+s, P20+Ni, SCM 420, ASTM Sa-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
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Chemical composition:
The following table shows the chemical composition of EN8M steel:
Element |
C |
Si |
Mn |
S |
P |
Content (%) |
0.35 – 0.45 |
0.25 |
1.00 – 1.30 |
0.12 – 0.20 |
0.060 Max |
Mechanical Properties:
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 |
HB |
Hardness |
201-255 Brinell |
J(minimum) |
Charpy V-Notch Impact = Room Temp |
28 |
— |