AISI 9255 Steel — Specifications & Listings
SAE/AISI — Silicon manganese spring steel
Grade Details
| Grade | AISI 9255 |
| Standard | SAE/AISI |
| Description | Silicon manganese spring steel |
| Applications | Heavy duty leaf springs, coil springs |
Equivalent / Similar Grades
| Grade |
Standard |
Region |
|
55Si7
|
DIN |
Germany |
|
EN45
|
BS970 |
UK |
|
SUP6
|
JIS |
Japan |
Chemical Composition (%)
| C |
Mn |
Si |
S |
P |
| 0.51–0.59 |
0.70–0.95 |
1.80–2.20 |
≤0.040 |
≤0.040 |
Mechanical Properties
| Tensile Strength |
1050–1250 MPa |
| Yield Strength |
≥900 MPa |
| Elongation |
≥7% |
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 AISI 9255 Listings on M-EX