EN-42
Leaf and volute springs, Road and railway vehicle springs including helical and plate springs.This steel is capable of taking up a good hardness and possesses an increased stability in tempering.
| Element | Min | Max |
| C % | 0.75 | 0.85 |
| Cr % | 1.40 | 1.80 |
| Mn % | 0.55 | 0.75 |
| P % | 0.04 | Max. |
| Si % | 0.10 | 0.40 |
| S % | 0.04 | Max. |
EN-45
Leaf and volute springs. Road and railway vehicle springs including helical and plate springs. This steel is capable of taking up a good hardness and possesses an increased stability in tempering.
| Element | Min | Max |
| C % | 0.5 | 0.0.60 |
| Cr % | 1.40 | 1.80 |
| Mn % | 0.70 | 1.10 |
| P % | 0.00 | 0.05 |
| Si % | 1.50 | 0.40 |
| S % | 0.00 |
0.05 |
EN-47
EN47 is suitable for oil hardening and tempering. When used in the oil hardened and tempered condition EN47 spring steel combines spring characteristics with good wear and abrasion resistance. When hardened EN47 offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, shock and vibration.
| Element | Min | Max |
| C % | 0.45 | 0.55 |
| Cr % | 0.80 | 1.20 |
| Mn % | 0.50 | 0.80 |
| P % | 0.00 | 0.05 |
| V % | 0.15 | 0.00 |
| S % | 0.00 | 0.05 |