CLASSI DI RESISTENZA

Classi di resistenza ø Filettatura mm Esempi di acciai utilizzabili
Resistance class ø Thread mm Examples of steels which can be used
4.8 ≤ 35 C4C – C1OC
5.8 ≤ 15 C10C
≤ 35 C20E2C
6.8 ≤ 13 C20E2C
8.8** ≤ 11 19MnB4 – C23B – 35B2 – 28B2
≤ 21 35B2 – 30MnB3
≤ 27 34Cr4 – 34CrMo4
≤ 27 41Cr4 – 42CrMo4
10.9** ≤ 16 35B2 – 30MnB3
≤ 20 34Cr4 – 34CrMo4
≤ 27 41Cr4 – 42CrMo4
12.9** ≤ 18 34Cr4 – 42CrMo4
≤ 22 41Cr4 – 42CrMo4
** Bonifica obbligatoria
** Hardening and tempering compulsory