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BR340/490HE has high strength, good elongation, food formability and flangeability, which can meet the forming requirement of auto parts with complex shapes, such as lower arm, etc. It can also be applied to other parts that need flanging. The flangeability is expressed by the hole expansion ratio. Hole expansion ratio is one of criteria to the formability of steels. It reflects the material’s resistance to local cracking because of large local stretch in the direction perpendicular to the hole during hole expansion.
BR340/490HE steel Chemical composition %
Grade |
C |
Si |
Mn |
Nb + Ti |
BR340/490HE |
<0.10 |
<1.50 |
0.5~2.0 |
0~0.10 |
BR340/490HE steel mechanical properties
Grade |
Thickness |
Tensile strength |
Yield strength |
Elongation |
Hole expansion rate (%) |
BR340/490HE |
1.6~6.0 |
≥490 |
≥340 |
≥24 |
≥80 |
BR340/490HE steel plate application :
BR340/490HE steel has many advantages such as good formability, high strength, low yield ratio, high initial work hardening rate, good balance of strength and ductility, etc. It is a solution to the problem that the high- strength low-alloy steel is not easy to punch. Dual-phase steel is suitable for manufacturing parts of complex shapes, such as car wheel discs and other components.
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