Common Grades and Standards of Zn-Al-Mg Steel Coil

Aluminum-Magnesium-Zinc coated steel is a new type of highly corrosion-resistant coated steel sheet with a coating composition consisting of zinc as the main substrate in combination with aluminum (about 11%), magnesium (about 3%) and a trace amount of silicon.Adding Al, Mg, and Si to it, the composite effect of these added elements improves corrosion resistance.Compared with hot-dip galvanized steel sheet and hot-dip galvanized-5% aluminium alloy steel sheet, it has less adhesion but equal corrosion resistance. In addition, it can be used instead of stainless steel or aluminium sheet because of its excellent red rust resistance.

As a steel supplier with downstream processing capability, we do not only provide Zn-Al-Mg steel coils, but also offer custom fabrication services for solar mounting components.

Based on Zn-Al-Mg coated steel (such as ZM310, ZM275, and other grades), we can process materials into:

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  • Solar PV mounting brackets
  • C-channel and U-channel structural parts
  • Ground-mounted solar support systems
  • Customized stamped or cut-to-length components

   

With advanced slitting, punching, forming, and cutting lines, we are able to supply both raw coil materials and finished solar bracket products, helping customers reduce their sourcing chain and improve installation efficiency.

This integrated production capability ensures:

1. Stable coating protection during fabrication

2. High dimensional accuracy for assembly systems

3. Cost efficiency from coil to finished structure

1.Q: What thickness options are available for ZM coating?
A: Common coatings include ZM30, ZM60, ZM100, ZM120, ZM275, etc.

2.Q: What base steel grades are used with ZM coating?
A: Common grades include DC51D, S350GD, S420GD, and similar.

3.Q: Does ZM steel require extra surface treatment?
A: Usually no, it can be used directly after coating.

4.Q: Is ZM steel environmentally friendly?
A: Yes, it offers longer service life and reduces maintenance needs.

5.Q: How does ZM compare to aluminum-zinc (AZ) steel?
A: ZM generally offers better cut-edge corrosion resistance.

6.What is the surface appearance of ZM steel?
A: It has a smooth, metallic gray surface with light spangle.