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High-strength steel cold rolled hot dip galvanized steel H300LAD+Z for automotive steel material
H300LAD+Z hot-dip galvanized sheet (coil) has the characteristics of strong coating adhesion, strong erosion resistance, accurate control of the thickness of the galvanized layer, high dimensional accuracy, flat profile, good mechanical, processing, and welding performance. They can be used to manufacture automotive interior and exterior panels, structural parts and reinforcements.
H300LAD+Z Hot-dip galvanized automotive steel size:
Nominal thickness: 0.30mm~3.0mm, nominal width: 800mm~1830mm
Note: The nominal thickness of the plate/strip is the sum of the thickness of the substrate and the thickness of the coating.
| Grade | Q/BQB 420-2014 | EN10346:2009 | GMW 3032-2013 |
| HC300LAD+Z,HC300LAD+ZF | HX300LAD | CR300LA |
Mechanical properties&coating adhesion of H300LAD+Z hot-dip galvanized automobile steel:
| Steel grade | Mechanical performances | Coating adhesiveness | ||||||
| Yield strength MPa | Tensile strength MPa | n90 ≥ | r90 a ≥ | BHb MPa | After breakage percent elongationa % | Bending center diameter c in following nominal | ||
| Thickness(mm) | ||||||||
| (a=plate thickness) | ||||||||
| L0=80mm, b=20mm | <1.5 | 1.5~3.0 | ||||||
| H300LAD+Z | 300~380 | 380~480 | - | - | - | 23 | 2a | 3a |
For alloyed hot-dip galvanized products, the minimum allowable reduction. The specified elongation and r90 can be 2% and 0.2, respectively.
BH refers to test y2 170°c±5°C in 20 minutes increments. User is s
If the total weight of the two coated surfaces is greater than 180g/m², the bending center diameter will increase by 1a; for differentially coated products, use the thicker coating as the outer surface in the bending test.
H300LAD+Z Hot-dip galvanized automobile steel coating range:
| Coating form | Applicable surface structure | Weight range of following coatings a g/m(A/B) | |
| Zinc coating | Zn-Fe alloy coating | ||
| Equally coating | Z, X, G, GX, N, R | 40/40~225/225 | 30/30~90/90 |
| Differential coating b | N, R | 30~150(each side) | - |
| a. 50 g/㎡ coating weight is equivalent to about 7.1µm. b. max. differential coating thickness ration is 1:3. | |||
