BR540/690HE hot rolled coils

BR540/690HE 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.

BR540/690HE steel Chemical composition %

Grade	C	Si	Mn	Nb + Ti
BR540/690HE	＜0.10	＜1.50	1.0~2.5	0.02~0.20

BR540/690HE steel mechanical properties

Grade	Thickness (mm)	Tensile strength (MPa)	Yield strength (MPa)	Elongation A50 (%)	Hole expansion rate (%)
BR540/690HE	1.6~6.0	≥690	≥540	≥14	≥70

BR540/690HE steel application :
BR540/690HE 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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