Matt Hot Dip Galvanized Steel Coils GI Z275 0.75mm 1250mm For Cladding Roofing Sheet
General Information Of Hot Dip Galvanized Steel Coil
Hot-dip galvanizing is a process of coating steel with a thin zinc layer which used to halt the formation of rust. The surface treatment is done by passing the steel through molten zinc at high temperature.It provides long-term protection for steel products.
The Zinc coating has corrosion resistance and sacrificial corrosion function which delay the production of red rust. The zinc coating of the hot dip galvanized steel is higher than electro-galvanized steel sheet so has better corrosion resistance.
We can supply the hot-dipped galvanized steel sheet and coil with slitting, shearing, blanking, degreasing and brushing, stretching and leveling, and metallurgical support.
Specification of hot dip galvanized steel sheet and coil
| Grade | SGHC, SGH400, SGCC, SGCH, SGCD, SGC400... |
|---|---|
| Thickness | Cold rolled: 0.11-3.2mm;Hot rolled: 1.6-6.0mm |
| Width | 610-1630mm |
| Zinc coating | G20, G30, G40, G60, G90, G115,G140, G165, G185, G210. |
| Surface Finish | Regular Spangle Sheet,Minimum Spangle |
| Surface Treatment | Chemical Treatment, Oil, Chemical Treatment and Oil, Dry, Phosphatized |
Chemical Composition Of Hot Dip Galvanized Steel Coil
| C | Si | Mn | P | Si |
| 0.04-0.06% | 0.01-0.03% | 0.18-0.22% | 0.014-0.016% | 0.006%-0.009% |
Technical Data Of Hot Dip Galvanized Steel Coil
| Yield Strength | (Mpa) 280-320 |
| Tensile Strength | (Mpa) 340-390 |
| Elongation | 20%-30% |
| Out-of-square | not exceed 1% Flatness |
| Bow | 15mmmax |
| Edge Wave | 9mmmax |
| Centre Buckle | 8mmmax |
| Bending At 180 Degree | No crack, purling and fraction |
Application Of Hot Dip Galvanized Steel Coil
Production of cold formed corrugated sheets and profiles for roofing, cladding, decking, tiles, sandwich walls, rainwater protective systems, air conditioning duct as well as electrical appliances and engineering
With GI as base metal, after pretreatment (degrease and chemical treatment) and liquid dope with several layers of color, then after firing and cooling, finally the plate steel is called pre-painted galvanized steel. Pre-painted galvanized steel is good capable of decoration, molding, corrosion resistance. It generally displays superior workability, durability and weather resistance.
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