Detailed Product Description

The product of continuous galvalume line is a kind of strip whose surface is hot dipped with the alloy with the composition of 55% Aluminum, 43.5% Zinc and 1.5% Silicon. It has excellent corrosion-resisting properties.
     Based on the hot dipped aluminum and galvanizing, the GL has been developed successfully, not only it has the good property of resistance to atmospheric corrosion and heat proof inoxidability of aluminum coating sheet, but also has the superior property of electrochemical protection, which make the outcut and scratched places not easy to be eroded and rusty. The main advantage is as follows:
    (1) Smooth surface, meanwhile with excellent property of resistance to atmospheric corrosion, and the anti-corrosion life is 2-6 times higher than hot galvanizing steel sheet.
    (2) Excellent heat proof inoxidability, and can long time maintain the color under the temperature of 300, while long time use under 500600. Also it has the advantage of good waterproof property which better than hot galvanizing  and hot dipped aluminum coating steel sheet, and ii has the resistance to soil corrosion which better than hot galvanizing steel sheet. It is good material for making car muffler, discharge pipe, foodstuff drier machine, water heater and so on anti-corrosion equipments. In addition, the heat reflectivity rate is higher than 75%, which is twice of galvanizing steel sheet.
   (3) Good painting and machining property. Having strong binding power with organic material, it is the optimal choice of base steel sheet for color organic coating. It has the similar machining and welding property with hot dipped galvanizing, and can be cold bending, punching etc, and has good appearance as well.
Otherwise, as the specific gravity of Aluminum is smaller than that of Zinc, the specific gravity of Aluminum Zinc alloy is only 3.7kg/dm3, and for zinc is 7.1kg/dm3, so on the condition of the same coating thickness, the Aluminum Zinc alloy is lighter, which saves the expensive coating layer metal.

                                  I  Cold Rolled Strip Continuous Galvalume Line
Line main feature
Raw materiastrip width: 600-1550 mm
    strip thickness: 0.2-1.2 (1.5) mm
    cold rolled low carbon iron SPCC, SPCD, FH; accords    with GB13237-91, JIS G 3141-1996
Coating layerGL; weight: 60-300 g/m²
Product qualityaccords with Q/B QB425-2004
Line speedentry section 0-240mpm; process section 0-180mpm; exit 0-240mpm
Annum output100,000 - 300,000 tpy
Energy saving styleheat recovery of flue gas, SUNNY patent
Continuous annealing furnaceRadiant tubes heating, vertical or horizontal
Fuel typenatural gas, liquefied petroleum gas, mixed gas, coke oven gas, and electricity
Welding machinenarrow lap seam welder
Degreasing stylechemical degreasing+ electrolytic degreasing+ three stages water rinsing, vertical or horizontal
Zinc pot typeceramic induction zinc pot: pre fusion pot + main pot
Air wiperSUNNY patent
Skin pass millfour-roll wet, max. roll force 4000KN
Tension Levelertwo bend units, one straighten unit
Passivation/anti-fingerprintroll coating style
Oiling styleelectrostatic oiling
Electric systemPLC, AC frequency conversion control system
Automatic instrumentPLC, intelligent auto control system

Line technics flow
    The cold rolled strip continuous annealing galvalume line, includes the functional section and equipment of annealing deoxidation, coating, cooling control, skin pass mill, Tension Leveler, passivation/anti-fingerprint etc.

                                 II   Hot Rolled Strip Continuous Galvalume Line
Line main feature
Raw materialstrip width: 600-1550 mm, strip thickness: 1.5-4.0 mm
Acid cleaned hot rolled low carbon iron coil, with no or little oil.
Coating layerGL; weight: 60-300 g/m²
Product qualityaccords with Q/B QB425-2004
Line speedentry section 0-130mpm; process section 0-100mpm; exit 0-130mpm
Annum output200,000 - 300,000 tpy
Energy saving styleheat recovery of flue gas, SUNNY patent
Continuous annealing furnaceNO oxidation furnace (NOF) + Radiant tubes (RTF), horizontal
Fuel typenatural gas, liquefied petroleum gas, mixed gas, coke oven gas
Welding machinedouble rolling lap seam welder
Degreasing stylechemical degreasing+ electrolytic degreasing+ three stages water rinsing, horizontal (can be omitted)
Zinc pot typeceramic induction zinc pot: prefusion pot + main pot
Air wiperSUNNY patent
Skin pass millfour-roll wet, max. roll force 6000KN
Tension Levelertwo bend units, one straighten unit
Passivation/anti-fingerprintroll coating style
Oiling styleelectrostatic oiling
Electric systemPLC, AC frequency conversion control system
Automatic instrumentPLC, intelligent auto control system
Line technics flow
    The cold rolled strip continuous annealing galvalume line, includes the functional section and equipment of annealing deoxidation, coating, cooling control, skin pass mill, Tension Leveler, passivation/anti-fingerprint etc.