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Related products : B140H1 steel , B180H1 steel , B180P2 steel
With drawing purpose, bake hardening steel (BH steel) refers to steel added with some solid solution carbon atoms by adoption of special chemical compositions and production process. It is a new type of high-efficient automotive steel plates with relative low yield strength at delivery and increased yield strength by certain extents through coating baking after their draw forming.
B180H2(BH340) high-strength bake hardening steel chemical composition:
Steel grade |
Chemical composition % |
|||||
|
C |
Mn |
P |
S |
Alt |
Nb a |
|
|
B180H2(BH340) |
≤0.020 |
≤0.40 |
≤0.12 |
≤0.025 |
≥0.020 |
- |
a: with Ti instead of Nb.
B180H2(BH340) high-strength bake hardening steel mechanical performance:
Steel grade |
Yield |
Tensile |
After Breakage Percent Elongation b |
After Breakage Percent Elongation b |
r |
n |
BH d |
|
B180H2(BH340) |
180~280 |
340 |
- |
32 |
1.4 |
0.18 |
30 |
a. taking R P0.2 in case of indistinct yield, otherwise R eL .
b. using P14 sample of GB/T228
c. r=(r 90 +2r 45 +r 0 )/4; n=(n 90 +2n 45 +n 0 )/4.
d. The user is ss
B180H2(BH340) high-strength bake hardening steel surface quality:
Grade |
Code No. |
Features |
|
Relatively high-grade finishing surface |
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 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. |
|
Ultra high-grade finishing surface |
FD(O5) |
One side of relatively good quality is free from any defect, namely appearance quality after painting or electrogalvanizing is no affected, and the other side must reach FB requirements at least. |
Automobile makers are paying more attention to BH steel for its enhancement of automotive body sheets in impression-resistant strength and its excellent formability. JW STEEL can provide steel grades B140H1, B180H1, and B180H2(BH340).