| Product Name | Galvanized Steel Coils |
| Thickness | 0.14mm-1.2mm |
| Width | 610mm-1500mm or according to customer's special request |
| Tolerance | Thickness: ±0.03mm Length:±50mm Width: ±50mm |
| Zinc Coating | 60g-275g |
| Material grade | A653, G3302, EN 10327, EN 10147, BS 2989, DIN 17162 etc. |
| Surface treatment | Chromated unoiled, galvanized |
| Standard | ASTM, JIS, EN, BS, DIN |
| Certificate | ISO, CE |
| Payment terms | 30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100% Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A |
| Delivery times | Within 30 days after the receipt of deposit |
| Package | First with plastic package, then use waterproof paper, finally packed in iron sheet or according to customer's special request |
| Application range | Widely used for roofs, explosion-proof steel, electrically controlled cabinet sand industrial freezers in the residential and industrial buildings |
| Advantages | 1. Reasonable price with excellent quality 2. Abundant stock and prompt delivery 3. Rich supply and export experience, sincere service |
Finishing:
Finishing is a cold rolling process of galvanized steel with a small amount of deformation for one or more of the following purposes. Improve the surface appearance of galvanized steel plate or suitable for decorative coating; So that the finished products do not see the processing of the phenomenon of slip line or fold temporarily reduced to the minimum.
What is the use of galvanized coils
Galvanized coil is a thin sheet of steel dipped into a molten zinc tank, so that the surface of the sheet is attached to a layer of zinc. Galvanized coil can be divided into hot rolled galvanized sheet coil and cold rolled hot galvanized sheet coil, the current main use of continuous galvanized process production, that is, into a coil of steel plate continuous dip in the melting of zinc plating tank made of galvanized steel plate.
Because galvanized coil has strong corrosion resistance, good surface quality, conducive to deep processing, economic and practical characteristics, so it is widely used in construction, household appliances, automobiles, containers, transportation and household industries and other fields. Especially steel structure construction, automobile manufacturing, steel warehouse manufacturing and other industries.
Defects in galvanized coils
Galvanized roll is easy to fall off, scratch, passivation spot, zinc grain, thick edge, air knife striation, air knife scratch, exposed steel, inclusion, mechanical damage, poor performance of steel base, wave edge, ladle, size, imprint, zinc layer thickness, roll printing and other defects.
The main reasons for the shedding of zinc layer of galvanized coil are surface oxidation, silicon compound, dirty cold tie emulsion, too high dew point of oxidizing atmosphere and protective gas in NOF section, unreasonable air-fuel ratio, low hydrogen flow, low oxygen infiltration in furnace, low temperature of strip into pot, low furnace pressure in RWP section and air suction in furnace door, low furnace temperature in NOF section. Oil evaporation is not enough, zinc pot aluminum content is low, the unit speed is too fast, insufficient reduction, zinc liquid residence time is too short, thick coating.
