| 特性 | S355 J2 | S450 J2 mod. |
|---|---|---|
| 屈服点 1 | min 355 MPa [N/mm²] | min 430 MPa [N/mm²] |
| 屈服点 2 | min 345 MPa [N/mm²] | min 420 MPa [N/mm²] |
| 抗拉强度 | 470 - 630 MPa [N/mm²] | 550 - 700 MPa [N/mm²] |
| 最大赫兹压力 | 750 MPa [N/mm²] | 900 MPa [N/mm²] |
Because of micro alloying with Vanadium and/or Niobium the steel grade S450J2 mod. has a significantly higher tensile and yield strength and a more fine-grained structure than the customary steel grade S355 J2.
In consequence of this and due to a stronger limitation of the elements P and S the steel shows a higher resistance to brittle fracture. Related to this is an increased bearing pressure which is shown by the diagram below.
