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G3312 Galvanized Steel Coil 18mm Thickness Hot Rolled Gi Coil

Place of Origin China
Brand Name TONGMAO
Certification ISO9001 MTC
Model Number Galvanized Steel Coils
Minimum Order Quantity 5tons
Price Negotiable
Packaging Details Standard Packing
Delivery Time 7-15days
Payment Terms L/C, T/T
Supply Ability 500tons/month

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Product Details
Width 30-3000mm Thickness 0.8~18mm/0.8-800mm
Thick Tolerance +/-0.2mm Stock Stock
Spangle Regular, Minimal, Zero, Big Zinc Coating 30-275g/M2
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Hot Rolled Gi Coil


G3312 Galvanized Steel Coil


18mm Thickness Steel Coil

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Product Description

Dx51d/Dx52D/SGCC/JIS G3312 Cold Rolled Steel Coil Hot Rolled Galvanized Steel Coil Gi Coil

Product Description


  Galvanized Steel Coil

 DX51D Dx52D Dx53D Dx54D Dx55D
Surface Treatment
coated, chromated, oiled
Zinc coating
about 10000 tons per month for the coil product
plastic film + water proof paper + steel plate+ packing steel strip.
construction, home appliance, ship building, etc.
Surface treatment
Chemical passivating treatment
minimize the chance of white rust forming during the transit and storage
maintain the bright shiny appearance for a longer time
minimize the tendency for storage and transit stain
passivating + oils
provide the protection from the storage and transit stain by special chemicals called corrosion inhibitors

Hot dip galvanized and cold galvanized difference is as follows:

1, hot dip galvanized as metal anti-corrosion way, it will usually be around 500 ℃ derusting processing steel structure in liquid zinc, zinc layer on the surface of steel structure. Cold galvanizing is through electrolysis adhered on the surface of the metal material such as a layer of metal film, make the material surface texture is uniform and anticorrosive wear-resisting, external appearance more beautiful.

2, hot dip galvanized coating thicker, generally for 30 to 60 micrometers, coating anticorrosion ability is higher. Suitable for outdoor work steel parts, such as highway fence, power tower, large-sized fasteners such as relatively long-term rust "rough" artifacts. Cold galvanizing, surface smooth level off, but because of the coating is thin, within 5-30 micron, so the corrosion time is short. Are used in indoor use the rust parts, such as the bottom of the chassis, panels, small specification fasteners, etc.

3, hot dipped galvanized by the principle of atmospheric corrosion resistant zinc, electrochemical protection, the material such as iron and steel for zinc carbonate on the surface of the protective film can slow down the corrosion rate, even if broken, will form of zinc film layer again. Cold galvanizing is to use chemical ways, separating the zinc alloy into zinc ions, has attached on the steel surface, this way to form new layer is thinner, the iron and steel in the general case, prone to rust.

4, cold galvanized surface is smooth, bright, colorful passivation technology of galvanized coating can present yellowish green, white passivation technology of plating can present bluish white, usually only a small amount of zinc layer on both ends of the steel tube of cold galvanization, there is no galvanized layer in the farther. Galvanized surface is rough, the color is darker, like silver, because the production process leads to surface have some lines and water drops of tumor, the surface light, nor reflection. Hot dip galvanized steel pipe internal and external are complete galvanized layer.


G3312 Galvanized Steel Coil 18mm Thickness Hot Rolled Gi Coil 0