Bainitic grade HR440Y580T-FB
General Information
The thermo-mechanically rolled, micro-alloyed steel grade HR440Y580T-FB features a high tensile strength of 590 MPa with sufficient elongation for forming applications, such as rectangular tubes and profiles. Due to its chemical composition, it offers good weldability. This steel grade is not standardized and it is classified in strength class D.
Chemical composition in percent by weight [%] (Heat analysis)
| Sorte | C | Si | Mn | P | S | Al | Ti+Nb | Cr+Mo | B | Cu |
| max. | max. | max. | max. | max. | max. | max. | max. | max. | ||
| HR440Y580T-FB | 0.18 | 0.50 | 2.00 | 0.050 | 0.010 | 0.015 - 2.0 | 0.15 | 1.00 | 0.010 | 0.20 |
Mechanical properties tensile test1)
| Grade | 2.00 - 2.99 mm | 3.00 - 6.00 mm | |||||
| direction of testing | Rp0,2 [MPa] | Rm [MPa] | A80 [%] | Rp0,2 [MPa] | Rm [MPa] | A5 [%] | |
| transverse | min. | 470 | 590 | 16 | 470 | 590 | 18 |
| max. | 590 | 710 | - | 590 | 710 | - | |
| longitudinal | min. | 440 | 580 | 15 | 440 | 580 | 15 |
| max. | 600 | 700 | - | 600 | 700 | - | |
Application examples
Thanks to the combination of high yield strength and high fracture elongation, the SZBS600 is appropriate to chassis parts with complex geometry, for example transverse links.