China Large Spangle Hot Dipped Zinc Galvanized Iron Steel Roll Gi Steel Coil

1.GI steel coil description
It is a special type of steel coil used in a number of different applications within fabrication&
manufacturing environments.GI coil is a process that involves coating metals such as steel
and iron with a thin layer of zinc.The pure zinc layer then turns into zinc oxide when it is
exposed to oxygen, zinc carbonate after exposure to carbon dioxide.
2.GI steel coil technical processing
After cleaning and acid pickling, the steel coil is submerged in melted zinc, a chemical reaction
permanently bonds the zinc. The zinc actually permanently becomes a part of it and successive
layers are a mixture of zinc and iron.GI steel coil is a special type of steel coil used in a number
of different applications within fabrication and manufacturing environments
3.GI steel coil flow chart
Decoiler Shearer welder pretreatment entry looper annealing furnace zinc pot air cooling tower
water cooler leveller post treatment exit looper crimper.

4.GI steel coil main usage scope:
widely used in the construction industry, as raw material for the production of corrugated panels,
fencing products, drywall panel profiles, ventilation systems etc. Recommended for both outside
and inside usage, galvanized steel has a high resistance to corrosion in different environments,
due to a protective layer of zinc of 100 180 grams per square metre.
5. GI steel coil advantages:
1) Zinc coating has good adhesion
2) Resistant to corrosive factors
3) High strength&quality
4) Strict quality control system
5) Standard export sea-worthy packing

StandardSteel Grades ApplicationGB/T 2518-200401Common commercial application02For mechanical engagement03For stamping04For deep drawing220,250,280,320,350For structural componentsJIS G 3302-1998SGCCCommon applicationSGCD1For stampingSGCD2For deep drawingDIN EN 10142-2000DX51D+ZFor common application and mechanical
engagementDX52D+ZFor stampingDX53D+ZFor deep drawingDIN EN 10147-2000S220GD+ZFor structural componentsS250GD+ZS280GD+ZS320GD+ZS350GD+Z