H180YD+Z, H180YD+ZF belongs to the standard Q/BQB 420-2003. Q/BQB 420-2003 H180YD+Z, H180YD+ZF hot dipped galvanized steel is a kind of ultra-low carbon high strength steel and the figure 180 means that the minimum yield strength for H180YD+Z is 180Mpa, Z means zinc coating. The grades for ultra-low carbon high strength under the standard Q/BQB 420-2003 are H180YD+Z, H180YD+ZF, H220YD+Z, H220YD+ZF, H260YD+Z and H260YD+ZF.
H180YD+Z, H180YD+ZF Chemical composition:
Grade |
Chemical composition % |
|||||||
|
C |
Si |
Mn |
P |
S |
Alt |
Tib |
Nb |
|
|
H180YD+Z, H180YD+ZF |
0.01 |
0.1 |
0.7 |
0.06 |
0.025 |
0.02 |
0.12 |
- |
H180YD+Z, H180YD+ZF Mechanical Property:
Grade |
Tensile Strength |
Yield Strength |
n90 |
r90 |
BHb |
Elongation% min |
The coating adhesion |
|
|
min |
min |
Mpa |
(Lo=80mm b=20mm) |
<1.5 |
1.5-3.0 |
|||
|
H180YD+Z, H180YD+ZF |
340-400 |
180-240 |
0.18 |
1.7 |
- |
34 |
0a |
0a |
a: For alloy hot dipped product, the elongation minimum value can reduce 2%, r90 can reduce 0.2.
b, BH value refers to puting the sample through 2% prestrain on the temperature 170C 土5C, keeping 20 minutes, then doing tensile test under the indoor temperature, the added value of measured yield strength compared with the stress at the time of the sample 2% prestrain.
c: When coating weight of the two sides is more than 180g/m2, the bending diameter adds to 1a; For difference thick coating products, thick coating surface as the outer surface of the bending test.
BEBON international is very professional in the production for Q/BQB 420-2003 H180YD+Z, H180YD+ZF steel plate, steel coil and steel strip and we have our own factory for hot dipped galvanized steel. We can supply H180YD+Z, H180YD+ZF according to customer’s requirement.