Zinc Aluminium Magnesium Steel Coils

Short Description:

Zinc-aluminum-magnesium steel coil is a new type of coating product, which is a popular field that many domestic steel mills have been involved in in recent years. The composition is zinc, and the ternary alloy coating with the content of aluminum and magnesium between 1.5 and 8% (among which the magnesium content is not less than 0.2%).

GRT is the top agent of Shougang, HBIS (Tangshan and Handan), and Angang for Zinc Al Mg Steel coils with an annual trade, processing, and distribution volume of 120,000 tons.

Product Detail

Product Tags

Standard ASTM, GB, JIS, EN
Grade DX51D-DX54D, S350GD/S420GD/S550,G350-G550
Thickness  0.3-6.0mm
Width  30mm-1250mm
Specific Width 136/157/178/198/218mm or "make to order"
ZM coating 30-450g/M2
Tolerance  Thickness:+/- 0.02mm   Width:+/-5mm
Coil ID 508mm,610mm
Coil Weight 3-8 tons
Surface treatment  Chromated/anti-finger (transparent,green,golden)
Application  Building Purlin/Decking, Automobile, Household Appliance, PV Mounting/Bracket

Advantages of Zinc Al Mg Steel Coils

● Because the zinc-aluminum-magnesium alloy coating is relatively thin and dense, it is not easy to peel off the coating;
● The corrosion outcome will flow and wrap the incision, so the protection performance of the incision and defect is better;
● It also has good corrosion resistance in some harsh corrosive environments (such as animal husbandry, coastal areas, etc.);
● It can replace some stainless steel with low requirements, or apply galvanizing after processing, which can simplify the user's processing process.

Experiment Test

Compared with traditional coatings such as hot-dip galvanized, galvanized aluminum, and zinc-iron alloys, zinc-aluminum-magnesium coatings have better corrosion resistance.


Weight of Aluminium and Magnesium

Al and Mg Content
Weight of Aluminium
Weight of Magnesium 
Low Aluminium
1.0%-3.5% 1%-3%
Medium Aluminium
5.0%-11.0% 1%-3%

End usage

Industry End usage
PV Mounting Solar Bracket
Steel Structure  C Purlin, U Purlin,Z Purlin
Automobile Auto Parts
Household Appliance Air Conditioner
Animal husbandry Folder Tower,Feeder,Fence
High speed  Guardrail


1. What is the anti-rust performance of the Zinc Al Mg Steel Coils?
The anti-rust performance of Zinc Al Mg Steel Coil is 10-20 times that of galvanized sheet, reaching the standard of stainless steel. This means it can withstand harsh environmental conditions and resist corrosion for longer.

2. How to reduce the cost?
The Zinc Al Mg Steel Coil is typically 40% less expensive than stainless steel, making it a cost-effective choice for a variety of applications. This is because the production process is less complex and requires fewer resources.

3. Can the Zinc Al Mg Steel Coils be corrosion-resistant and anti-rust?
Yes, one of the biggest features of this material is good corrosion resistance. It can be automatically fixed to prevent the red display, which is a common problem in other materials.

4. Does it have a good processing performance?
Yes, the Zinc Al Mg Steel Coil has excellent processing properties due to its wear and scratch resistance. It can adapt to various processing methods and maintain its integrity during the manufacturing process.

5. Is the Zinc Al Mg Steel Coils environmentally friendly?
Yes, cutting materials have passed a number of international environmental regulations and standards. It is free of harmful chemicals and can be recycled, making it a sustainable choice for a variety of applications.

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