55Si7 Steel — Specifications & Listings
DIN/EN10089 — Silicon manganese spring steel
Grade Details
| Grade | 55Si7 |
| Standard | DIN/EN10089 |
| Description | Silicon manganese spring steel |
| Applications | Leaf springs, coil springs, torsion bars |
Equivalent / Similar Grades
Chemical Composition (%)
| C |
Si |
Mn |
S |
P |
| 0.51–0.59 |
1.50–2.00 |
0.70–1.00 |
≤0.040 |
≤0.040 |
Mechanical Properties
| Tensile Strength |
1000–1200 MPa |
| Yield Strength |
≥900 MPa |
| Elongation |
≥7% |
| Hardness |
285–363 HB |
Typical Available Sizes
| Round Bar |
10mm–75mm dia |
| Flat Bar |
20×5mm–100×20mm |
| Spring Flat |
3×20mm–16×100mm |
Sizes are indicative. Contact seller for exact availability.
Active 55Si7 Listings on M-EX