Galvalume Sheet
Galvalume coils are based on cold-rolled steel sheets and are made of 55% aluminum, 43.4% zinc, and 1.6% silicon solidified at 600°C. It combines the physical protection and high durability of aluminum with the electrochemical protection of zinc. Also known as galvalume steel coil.
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Product Description

Product Description

Galvalume coils are based on cold-rolled steel sheets and are made of 55% aluminum, 43.4% zinc, and 1.6% silicon solidified at 600°C. It combines the physical protection and high durability of aluminum with the electrochemical protection of zinc. Also known as galvalume steel coil.

 

The production process of galvanizing is as follows:

Uncoiling-cleaning-annealing-zinc pot-cooling-air knife-straightening-post-processing-coiling

 

Heat reflection

People use it as a thermal insulation material, and its heat reflectivity is up to twice that of galvanized steel.

 

Heat resistance

Galvalume-coated steel coils have good heat resistance and can withstand high temperatures above 300°C. They are very similar to the oxidation resistance of aluminized steel sheets at high temperatures.

 

Corrosion resistance

The key to the corrosion resistance of galvalume steel coils lies in the protective properties of aluminum. Once the zinc is worn away, the aluminum forms a dense layer of aluminum oxide, preventing further internal corrosion.

 

Economy

The density of 55% AL-Zn is smaller than that of Zn. Therefore, when the weight and thickness of the coating are the same, the area of the galvanized steel sheet is 3% larger than that of the galvanized steel sheet.

 

Application scope

Construction industry: such as roofs, interior and exterior wall panels, sound insulation walls, pipes, garages, etc.

Automotive industry: such as mufflers, exhaust pipes, wiper accessories, fuel tanks, truck containers, etc.

Household appliances: such as refrigerator back panels, air conditioners, microwave ovens, LED backlights, electrical cabinets, etc.

Agricultural purposes: such as greenhouses, granaries, pig farms, chicken coops, etc.

Other industries: such as heat exchangers, dryers, etc.


Product parameters

Product Namehot dipped galvanized sheet
Thickness0.12mm-6.00mm
Width600mm-1500mm
Length1m-12m, support customization
StandardAISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Aluminum zinc coating thickness30-185g/m²
Aluminum zinc coating contentAl:55%, Zn:43.5%, Si:1.5%

 

Chemical Composition

AlZnSiFeCuCdPbSnNiTi+Ba+Cr
55-5841-431.5-20.250.030.050.010.050.050.05

 

Mechanical behavior

GradeYield strength MPa≥Tensile strength MPa≥Elongation A%≥
DX51D+Z/ZM/AZ/AM240-380270-50022
DX52D+Z/ZM/AZ/AM140-300270-42026
DX53D+Z/ZM/AZ/AM140-360270-38030
DX54D+Z/ZM/AZ/AM120-220260-35036
S220GD+Z/ZM/AM22030020
S250GD+Z/ZM/AZ/AM25033019
S280GD+Z/ZM/AM28036018
S300GD+ZM/AM30038018
S320GD+Z/ZM/AM32039017
S350GD+Z/ZM/AZ/AM35042016
S450GD+Z/ZM/AM45048015
S550GD+Z/ZM/AZ/AM550550-

 

Galvanized surface options

Zero zinc flowerSmall zinc flowerNormal zinc flowerBig zinc flower
    

 

Coating typeRecommended coating weight
Aluminum zinc alloy30/40/50/60/75/90/100/150
A: The coating mass is 50g/㎡, which is approximately equal to the coating thickness of 13.3pm.

 

 

ProjectClassificationSymbol
Coating typeAluminum zinc alloyAZ
Surface finishRegular SequinsR
Minimize sequinsM
Skin PassS
Surface treatmentChromate passivationC
Non-chromate passivationC5
Chromate passivation + oilingCO
Chrome-free passivation + oilingCO5
Anti-fingerprintN
Chromate-free anti-fingerprintN5
Chromate-free, highly weather-resistant and anti-fingerprintNW
oiling0
No treatmentU

 

Material comparison

Chinese standardEuropean standardAmerican standardJapanese standard
DC51D+AZDX51D+AZCS Type B, Type CSGLCC
DC52D+AZDX52D+AZDSSGLCD
S250GD+AZS250GD+AZ255-
S300GD+AZ---
S350GD+AZS350GD+AZ345345
S550GD+AZS550GD+AZ550SGLC570

 

 

FAQ

Q: Do you accept third-party inspection?

A: Yes, we absolutely accept it.

 

Q: Do you provide samples? Free or extra?

A: The cost of samples is calculated based on the value. Shipping fee is necessary.

 

Q: Do you have a large inventory of steel?

A: Yes, we have a large indoor warehouse with a total annual spot inventory of more than 200,000 tons.

 

 

Q: What is your delivery time and supply capacity?

A: The delivery time is usually within 15~28 working days, and we can supply about 10,000 tons per month.

 

Q: How to order?

A: Buyer sends inquiry-->Buyer gets quotation-->Order confirmation-->Buyer sends deposit-->Seller prepares goods-->Seller strictly inspects-->Buyer arranges balance payment-->Packaging and delivery.

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