DC56D+ZFa,b is a kind of hot dipped galvanized steel under the standard Q/BQB 420-2003.
DC56D+ZF Chemical composition:
Grade |
Chemical composition % |
|||||||
|
C |
Si |
Mn |
P |
S |
Alt |
Ti |
Nb |
|
|
DC56D+ZFa,b |
0.01 |
0.10 |
0.30 |
0.025 |
0.020 |
0.015 |
0.1 |
0.1 |
STEEL GRADE |
Tensile Strength |
Yield Strength |
n90 |
r90 |
Elongation% min |
The coating adhesion |
|||
|
min |
min |
<0.7mm |
>0.7mm |
<140/140 |
>140/140-175/175 |
>175/175 |
|||
|
DC56D+ZFa,b |
270-350 |
120-180 |
0.20 |
1.7 |
36 |
38 |
0a |
1a |
2a |
a means when the thickness is more than 1.5mm, the minimum value r90 can lower 0.2.
b means when the thickness not more than 0.7mm, the minimum value r90 can lower 0.2, n90 can lower 0.01.
c means For difference thickness of coating products, thick coating surface as the outer surface of the bending test.
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