Manganese boron steels
UNI EN ISO 683-2
Manganese-boron steels are an alternative to the traditional steels for quenching and tempering. Compared to these last ones, they have a lower carbon content (max. 0.50%) but higher manganese and the addition of boron (20 ÷ 50 ppm). Thanks to these values of the chemical analysis, manganese-boron steels have some advantages including a good weldability, excellent strength after the heat treatment and a better cold deformability.
They are used in press hardening and in the automotive sector, as well as a substitute of case-hardened steels and, as already mentioned, of steels for quenching and tempering.
Steel strip
| Grade | Thickness (mm) | Width (mm) | Condition |
|---|---|---|---|
| 20MnB5 | 0.20 – 14 | 12 – 650 | +H |
| 27MnCrB5 | 0.20 – 14 | 12 – 650 | +H |
| 30MnCrB5 | 0.20 – 14 | 12 – 650 | +H |
Spools/Reels
| Thickness (mm) | Width (mm) | ||||
|---|---|---|---|---|---|
| 2-4 | 5-7 | 8-12 | 13-20 | 21-50 | |
| 0.08 - 0.14 | |||||
| 0.15 - 0.30 | |||||
| 0.31 - 0.40 | yes | yes | yes | yes | yes |
| 0.41 - 0.60 | yes | yes | yes | yes | yes |
| 0.61 - 1.00 | yes | yes | yes | yes | yes |
| 1.01 - 1.50 | yes | yes | yes | ||
| 1.51 - 2.00 | yes | yes | yes | ||
| 2.01 - 2.50 | yes | ||||
| 2.51 - 3.50 | |||||