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Technical Data - 722M24 - EN40B
Related Specifications - 1.8515, 31CrMo12, 30CD12
722M24 - EN40B is a 3% Chromium Molybdenum Nitriding
Steel.
Chemical
Analysis |
Element
|
C |
Si |
Mn |
Cr |
Mo |
Percentage |
0.20 / 0.28 |
0.10 / 0.35 |
0.45 / 0.70 |
3.00 / 3.50 |
0.45 / 0.65 |
Material is usually supplied in the hardened
& tempered condition in which state it is readily machineable,
offers high wear resistance and has good toughness and ductility.
After Nitriding, a minimum surface hardness of 750 Vickers
(VPN), equivalent to 62 Rockwell is achieved.
Mechanical
Properties |
Tensile |
Yield |
Elongation |
Impact |
Hardness |
N/mm² |
N/mm² |
% |
Izod J
|
HB |
850 / 1000 |
650 min |
13 min |
40 min |
248 / 302 |
Above properties are for steel hardened and
tempered to 55/65 tons tensile (T Condition).
Main Uses : Gears, Cams, Gudgeon Pins, Pinions, Spindles,
Pump Shafts
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