Color Coated 55% Galvalume Steel Coil AFP/ Non AFP Galvalume Steel ,G550,G450,G300,Minimised Spangle,Anti-Finger Print

Hot Dip Galvanizing Production Process:

Raw materials (cold rolled steel coils) → uncoiling → cutting head and tail → welding → spraying by alkali liquor→scrubbing by alkali liquor→ electrolytic degreasing → water scrubbing → hot air drying → entry looper → reduction and annealing → hot dip galvanizing → zinc layer control (air knife) → cooling → finishing → stretching, bending and straightening → purification → drying → exit looper → coil unloading → coil weighing → packaging → warehousing

Introduction:

Galvalume is a product very similar to Galvanized steel with better corrosion resistance(up to three times the life of galvanized steel ).The superior properties of Galvalume arise from the unique composition ( 43.5%Zn, 1.5% Si, 55% AL) of the metallic coating. Applications include roofing base material for pre-painting.Hot-dip aluzinc steel sheet is substrated on cold rolled steel(CRC)in various strength and specification Coating composition is 55％aIuminum in weight ratio．43 4％zinc．and 1 5％silicon with excellent corrosion and heat resistance performance.

Products : 55% Clear Galvalume steel coil

Standard : ASTM A653 , JIS G3321 , GB/T3830-2006

Grade : G550 , G450 , G300,DX51D+AZ,DX52D+AZ, SGLCC,SGLCH

Thickness : 0.12mm-2.0mm

Width : 30mm-1500mm

Base Metal : Cold Rolled Steel

AL-Zinc Coating : AZ30-150g/sqm

Coil Internal Diameter : 508mm/610mm

Surface Treatment : Chromating , Oiled

Tolerance : Thickness:+/-0.05mm , Width:+5/-2mm , Total Quantity:+/-10% , Zinc Coating:+/-10%

Surface Finish : Regular spangle ,Minimise spangle

Application range:

Construction: the roof of the building, the exterior wall, the garage door, the fence, the shutter.
Home appliance industry: oven, air conditioning and ventilation system outside the cover, solar water heater, electrical components.
Automobile industry: automobile muffler, exhaust pipes and a catalytic converter heat shield, the bottom part of the car body, road signs.
Industrial instrumentation: electric control cabinet, industrial refrigeration cabinet, vending machine.

Roofing sheets specification for Galvalume steel coil :