Changzhou Dingang Metal Material Co.,Ltd.
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Al - Zn Alloy Coated Steel Coil / Sheet / Strip For Air Cleaners And Highway Barriers
Profile :
The Plating Coat Of Aluminum - zinc Alloy Armor Plate Is Zn - Al Alloy , And Its Composition Is 55 % Al , 43.4 % Zn And 1.6 % Si . The Plate is of Smooth Surface And Excellent Corrosion Resistance Of The Atmosphere , Which Is 2 To 6 Times Higher Than Hot-Dip Galvanized Sheet Of The Same Thickness Of Plating Coating.
After Through Three Processes , Including Payoff Reel , Crop Shear And Welding , Enter Into The Continuous Annealing Furnace . During The Annealing Process , Strips Are Heated Closer To The Recrystallizing Temperature , And Then Heated To 20 - 50 Above The Recrystallizing Temperature In The Reducing Furnace . After Keep The Same Temperature For 170 s , Strips Are Naturally Cooled To The Normal Temperature In The Low Cooling Process . Afterward , Strips Enter Into The Zn - Al Pot Through The Elephant ‘ s Trunk And Begin In The Hot - Dip Coating Process . The Optimum Temperature Rang Of The Plating Coat Is 630 660 . Coated With Aluminium - Zinc Alloy , Strips Enter Into The Cooling Tower By The Steady Roll And Air Knife . After Fast Cooled With Wind Or Water , They Are Directly Produced Into Al - Zn Armor Plates .The General Rate Of Cooling Is 30 / s , And Strips Are Cooled To About 60 .
Specifications of Aluzinc Coated Steel :
■Standard : ASTM A792 / JIS G3321 / GB/T14978-2008 / EN10326-2004
■Grade : SGLCC / SGLCD / SGLC400~570 / DC51D+AZ~DC54D+AZ
■Thickness : 0.15-2.5 mm
■Width : 600 - 1250 mm ( Usually 914 mm / 1219 mm / 1220 mm / 1250 mm)
■Base Metal : Cold - Rolled Steel
■Al-Zinc Coating : 50 - 150 g / sqm
■Coil Internal Diameter : 508 mm / 610 mm
■Surface Treatment : Chromate Passivated , Non - Chromate Passivated , Oiled , Anti - finger Print And Etc
■tolerance thickness : + / - 0.05 mm , tolerance width : + 5 / - 2 mm , total quantity : + / - 10 % , alu - zinc coating : + / - 10 %
■Packing Condition : Seaworthy
Characteristics :
GL are 3 ~ 6 times more corrosion - resistant compared to GI , but has a similar level of processability and weldability and can replace GI, and in particular is most suitable when replacing GI that require thick galvanized layers and high corrosion resistance .
Only galvanized steel sheet that is used for roofing and walls without painting because of its unique silver spangles and beautiful appearance and high - corrosion resistance, and is used as a cool roofing material because of its excellent heat reflection qualities .
Can replace aluminum gilded steel sheets because for certain purposes of its electrical conductivity and its heat-resistance qualities even at high temperatures that do not exceed 315 ℃ .
Has greater surface hardness than GIs , and is much more wear - resistant .
Product Application :
Infrastructure : Roofing / External Siding / Garage / Shutter
Household Appliances : Oven / Air - Conditioning Ventilation System / Solar Water Heater / Electronics
Automobile : Mobile Muffler / Vent Pipe / Catalysis Converter Heater Shield / Bottom Accessories
Industrial Instrument : Electric Control Cabinet / Industrial Freezer Chest
Chemical Requirements of Aluzinc Coated Steel :
| Chemical Requirements For Structure Steel
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| Composition , % - Heat Analysis Element , Maximum , Unless Otherwise Shown | ||||||||||||
| Designation | C | Mn | P | S | Cu | Ni | Cr | Mo | V | Cb | Tia | Nb |
| G230 | 0.20 | 1.35 | 0.04 | 0.04 | 0.25 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | * |
| G255 | 0.20 | 1.35 | 0.10 | 0.04 | 0.25 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | * |
| G275 | 0.25 | 1.35 | 0.10 | 0.04 | 0.25 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | * |
| G340 | 0.25 | 1.35 | 0.20 | 0.04 | 0.25 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | * |
| G550 | 0.20 | 1.35 | 0.04 | 0.04 | 0.25 | 0.20 | 0.15 | 0.06 | 0.008 | 0.015 | 0.025 | * |
