Hot-dip galvanized steel is produced by passing coils of cold-rolled steel through a molten zinc bath at a temperature of approximately 460 degrees Celsius. Hot-dip galvanizing is a process in which a thin layer of zinc is applied to steel to act as a barrier between the steel and the environment. Hot-dip galvanized steel panels have features such as corrosion resistance and durability.
GNEE Steel's hot-dipped galvanized steel sheet and coil service capabilities include slitting, multi-blanking and cut-to-length, metallurgical support, stretcher leveling, and toll processing.
Introduction of hot-dip galvanized grades
| Grade | Feature |
| DC51D+Z,DC51D+ZF,DD51D+Z | Low carbon steel |
| DC52D+Z,DC52D+ZF | Low carbon steel or interstitial free steel |
| DC53D+Z,DC53D+ZF | |
| DC54D+Z,DC54D+ZF,DD54D+Z | Interstitial free steel |
| DC56D+Z,DC56D+ZF | |
| DC57D+Z,DC57D+ZF | |
| S220GD+Z,S220GD+ZF | Carbon structural steel or low alloy steel |
| S250GD+Z,S250GD+ZF | |
| S280GD+Z,S280GD+ZF | |
| S320GD+Z,S320GD+ZF | |
| S350GD+Z,S350GD+ZF | |
| S550GD+Z | |
| HC180YD+Z,HC180YD+ZF (H180YD+Z,H180YD+ZF) |
High strength interstitial free steel |
| HC220YD+Z,HC220YD+ZF (H220YD+Z,H220YD+ZF) |
|
| B240P1D+ZF B260LYD+ZF |
|
| HC260YD+Z,HC260YD+ZF (H260YD+Z,H260YD+ZF) |
|
| HC180BD+Z,HC180BD+ZF (H180BD+Z,H180BD+ZF) |
Bake-hardening steel |
| HC220BD+Z,HC220BD+ZF (H220BD+Z,H220BD+ZF) |
|
| HC260BD+Z,HC260BD+ZF (H260BD+Z,H260BD+ZF) |
|
| HC300BD+Z,HC300BD+ZF | |
| HC260LAD+Z,HC260LAD+ZF (H260LAD+Z,H260LAD+ZF) |
High strength low alloy steel |
| HC300LAD+Z,HC300LAD+ZF (H300LAD+Z,H300LAD+ZF) |
|
| HC340LAD+Z(H340LAD+Z) HC340LAD+ZF(H340LAD+ZF) HD340LAD+Z(HR340LAD+Z) |
|
| HC380LAD+Z(H380LAD+Z),HC380LAD+ZF | |
| HC420LAD+Z(H420LAD+Z),HC420LAD+ZF HD410LAD+Z(HR410LAD+Z) |
|
| HC250/450DPD+Z,HC250/450DPD+ZF | Dual-phase steel |
| HC300/500DPD+Z,HC300/500DPD+ZF | |
| HC280/590DPD+Z,HC280/590DPD+ZF | |
| HC340/590DPD+Z,HC340/590DPD+ZF | |
| B340/590DPD+Z,B340/590DPD+ZF | |
| HC420/780DPD+Z,HC420/780DPD+ZF | |
| HC550/980DPD+Z | |
| HC380/590TRD+Z,HC380/590TRD+ZF | Transformation induced plasticity steel |
| HC400/690TRD+Z,HC400/690TRD+ZF | |
| HC420/780TRD+Z,HC420/780TRD+ZF | |
| HC350/600CPD+Z,HC350/600CPD+ZF | Complex phase steel |
| HC500/780CPD+Z,HC500/780CPD+ZF | |
| HC700/980CPD+Z,HC700/980CPD+ZF | |
| HD620/750CPD+Z,HD620/750CPD+ZF | |
| HD680/780CPD+Z,HD680/780CPD+ZF | |
| HD720/950CPD+Z,HD720/950CPD+ZF |
Categories and treatment of hot-dip galvanized coating
| Classification | Category | Code | |
| Coating type | Pure zinc coating | Z | |
| Zinc-iron alloy coating | ZF | ||
| Expressive methods of coating weight | Uniform thickness A (g/m²)/B (g/m²)(A=B) |
A/B | |
| Different thickness coating A (g/m²)/B (g/m²)(A≠B) |
|||
| Surface structure | (Z)Pure zinc coating | Minimized spangle | X |
| Zero spangle | M | ||
| Surface treatment | (ZF)Zinc-iron alloy coating | Zinc-iron alloy | R |
| Chromic acid passivation | C | ||
| Chromic acid passivation + oiling | CO | ||
| Chrome-free passivation | C5 | ||
| Chrome-free passivation + oiling | CO5 | ||
| Chrome-free fingerprint resistant | N5 | ||
| Self-lubricating | SL | ||
| Oiling | O | ||
| Without treatment | U | ||
a. A is the coating weight on the outer surface of steel strip or the coating weight on the upper surface of steel plate, with the unit in g/m2;
B is the coaling weight on the inner surface of steel strip or the coating weight on the lower surface of steel plate, with the unit in g/m2.
b. By the agreement of both sides of supply and demand, the code of the coating with uniform thickness can be expressed with the sum of the weight in both sides,such as 2250,ZF90.etc.
Hot-dip galvanized coating range and recommended nominal coating weight
| Coating form | Applicable surface structure | Range of coating weight of the following coating types (A/B) | |
| (Z)Pure zinc coating | (ZF)Zinc-iron alloy coating | ||
| Uniform thickness | X,M,R | 30/30-225/225 | 30/30-90/90 |
| Different thickness | X,M | 30~150(Each side) | - |
| Coating type | Coating form | Recommended coating weight g/m² | Coating code |
| Z | Unifonmn thickness | 40/40 | 40/40 |
| 50/50 | 50/50 | ||
| 70/70 | 70/70 | ||
| 100/100 | 100/100 | ||
| 125/125 | 125/125 | ||
| 140/140 | 140/140 | ||
| 175/175 | 175/175 | ||
| 225/225 | 225/225 | ||
| ZF | Unifonmn thickness | 30/30 | 30/30 |
| 45/45 | 45/45 | ||
| 50/50 | 50/50 | ||
| 60/60 | 60/60 | ||
| Z | Different thickness | 50/100 | 50/100 |
| 70/140 | 70/140 |
Hot-dip galvanized coating range
| Coating type | Coating form | Coating code | Coating weight g/m² Not less than | |
| Average value of three points in the single side | Single spot per side | |||
| Z,ZF | Coating with uniform thickness | A/B | A/B | (0.85xA)/(0.85xB) |
| Z | Coating with different thickness | |||
Available range of hot-dip galvanized products
| ltem | Nominal mm | |
| Thickness | 0.30-3.0 | |
| Width | Steel strip | 700-1830 |
| Slitting steel strip | 450-900 | |
| Length | Steel plate | 1000-6000 |
| Inside diameter of steel strip(coil) | 610/508 | |
Hot-dip galvanized steel plate product display
Why GNEE?
1.Convenient payment terms: 30% Tt Advance + 70% Balance or negotiate with us
2.Strong production capacity: 10,000 tons per month
3.Fast delivery time: within 7-10 days
4.Convenient loading ports: Tianjin Port, Shanghai Port and other ports in China
GNEE is a partner you can trust to deliver products to your exact specifications exactly when you need them. With our inventory management and just-in-time delivery programs, we help customers manage inventory to reduce working capital, reduce inventory, and save money. Contact us today to learn more.
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