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Steels designed for the hardening of the surface layer
Carburized steels, with a low carbon content, allow pieces to be obtained that, after the mechanical processing and carburizing treatment, combine a high surface hardness with a good core toughness.Thanks to the high surface hardness that can be obtained with the carburizing treatment, these steels are used to create those mechanical bodies for which a considerable surface hardness is necessary, such as gears, pins, bushes, shafts, and everything necessary for the transmission of motion.
The versatility of the range of carburized steels allows a vast range of uses to be covered, from the smallest gears to motor shafts of considerable size. The heat treatments available for this type of steel – to be checked on a case-by-case basis according to the different qualities – are: rolled natural, workable annealed, isothermal annealed, globular annealed, normalized, and quenched and tempered.
| Execution | Profile | Range (mm) | Finish | Tolerances | |
|---|---|---|---|---|---|
| Bars | Rolled | Round | 20 - 105 | Raw, peeled iron product | - |
| Drawn | Round hexagonal square special |
2-80 4-80 4-70 |
Polished | EN 10278 h9 h10 h11 |
|
| Peeled - rolled | Round | 20-100 | Polished | EN 10278 h9 h10 h11 |
|
| Ground | Round | 3-100 | Polished | EN 10278 h7 h8 h9 h10 h11 |
|
| Coils | Drawn | Round hexagonal square special |
2-22 3-12 4-12 |
Polished, phosphated | EN 10278 h9 h10 h11 |
