Related grade: B400/780DP

B340/590DP automobile high-strength dual-phase steel is featured with low yield strength, no yield elongation, high strain strengthening index and excellent collision-resistance and can increase safety of automobiles while lowering their weight. It is an advanced high-strength recently developed and has been applied in batches to automotive industry in developed countries. It is mainly used for manufacturing wheels, bumpers, suspension systems and reinforcements as well as outside plates of automobiles.

B340/590DP automobile high-strength dual-phase steel product sizes:
Nominal thickness: 0.60mm~2.00mm, nominal width: 800mm~1730mm

B340/590DP automobile high-strength dual-phase steel mechanical performances:


Steel grade

Yield strengtha
MPa

Tensile strength Mpa

After Breakage Percent Elongation (L0=50mm, b=25mm)%≥

180°;Bending test (b≥20mm)

Nominal thickness mm

0.60~<1.0

1.0~<1.6

1.6

Bending center diameter

B340/590DP

340~500

590

16

18

20

0.5a

  1. taking RP0.2 in case of indistinct yield, otherwise ReL。
  2. using P14 sample of GB/T228

B340/590DP automobile high-strength dual-phase steel surface quality:


Grade

Code No.

Features

Relatively high-grade finishing surface

FB(O3)

It is allowed for existence of a few surface defects which will not affect forming and coating & coating & plating adhesiveness such as minor scratch, impression, pit, roll mark and oxidation tint.

High-grade finishing surface

FC(O4)

One side of relatively good quality is free from any remarkable defect visible and the other side must reach FB requirements at least.