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Related products : B400/780DP high-strength dual-phase steel
B340/590DP 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 high-strength dual-phase steel chemical composition:
Steel grade |
Chemical composition % |
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|
C |
Si |
Mn |
P |
S |
Alt |
|
|
B340/590DP |
≤0.18 |
≤0.80 |
≤2.20 |
≤0.035 |
≥0.030 |
≥0.020 |
B340/590DP high-strength dual-phase steel mechanical performance:
Steel grade |
Yield |
Tensile |
After Breakage Percent Elongation b |
180°bending test |
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|
Nominal thickness mm |
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|
|
|
|
Bending center diameter |
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|
B340/590DP |
340~500 |
590 |
16 |
18 |
20 |
0.5a |
a. taking R P0.2 in case of indistinct yield, otherwise R eL .
b. using P14 sample of GB/T228
B340/590DP high-strength dual-phase steel surface quality:
Grade |
Code No. |
Features |
|
Relatively high-grade |
FB(O3) |
It is allowed for the existence of a few surface defects which will not affect forming and coating & plating adhesiveness such as minor scratch, impression, pit, roll mark and oxidation tint. |
|
High-grade finishing |
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. |