The main suppliers are not only the Slovenian ironworks SIJ RAVNE | SIJ ACRONI | ŠTORE STEEL, but also other major companies from all over Europe.
Steel with a higher (0.55%) carbon content for greater strength than the lower carbon alloys. It is hardenable by heat treatment, quench and tempering.
Steel for springs, for quenched and tempered springs, for surface hardened products like shafts, bushings, crankshafts, etc.
| Jakost oceli | C | Mn | Si | Cr | W | Mo | V | Ni | P | S | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DIN / EN C55 | 0,56 | 0,75 | 0,40 max. | 0,40 max. | 0,10 max. | 0,40 max. | 0,035 max. | 0,035 max. | |||
| ČSN 12060 | 0,54-0,65 | 0,70-0,80 | 0,40 max. | 0,40 max. | 0,10 max. | 0,40 max. | 0,035 max. | 0,035 max. |