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Hot Dip Zn-AL-MG Alloy Coated Steel
OVERVIEW OF ZAM ALLOY COATED STEEL
Hot-dip Zn-AL-MG alloy coated steel, also known as ZAM steel, is a new type of coating product. The zinc-aluminium-magnesium coating is a ternary alloy coating with zinc as the main component, and the content of aluminium and magnesium is between 1.5-8% (among which the magnesium content is not less than 0.2%). The magnesium in the coating is beneficial to promoting the formation of a very stable and well-organized and meticulous protective film, namely Hydrozincite (（Zn5 (OH)8Cl2 ‧H2O）, which generates and maintains a film-like covering on the surface of the coating, thereby ensuring excellent corrosion resistance. Compared with traditional coatings such as GI and Aluzinc, ZAM alloy-coated steel is known for its superior corrosion resistance, formality, wear and scratch resistance and can be applied in a wide range of fields such as automotive, HAVC, solar photovoltaics, agriculture, high-speed guardrails, electrical cabinets, greenhouse structures, etc.
Features of Hot Dip Zn-AL-MG Alloy Coated Steel
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1
Superior corrosion resistance: With the addition of MG and AL content, ZAM alloy coated steel has superior corrosion resistance. The planar corrosion resistance of ZAM coating is about 3 times that of GI coating.
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2
Formability: The coefficient of friction of the ZAM coating is 15% lower than that of the GI coating, and it remains stable during reciprocating friction, giving it excellent formability.
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3
Cost Reduction: An excellent alternative to much more costly materials such as aluminum and stainless steel.
PARAMETER OF ZAM ALLOY COATED STEEL
Standard | JIS/ASTM/EN |
Content | Low AL&MG : Zn-(0.5-3%) Al-(0.4-2%)Mg Mid AL&MG: Zn-(3-13%) Al-(2-4%)Mg High AL Mid MG: Zn-(50-60%) Al-(2-4%)Mg |
Grades | DX51D+ZM/DX52D+ZM/DX53D+ZM |
S220GD+ZM/S250GD+ZM/S280GD+ZM/S320GD+ZM/S350GD+ZM | |
S400GD+ZM/S550GD+ZM | |
HD300LAD+ZM/HD340LAD+ZM/HD380LAD+ZM HD420LAD+ZM/HD460LAD+ZM/HD500LAD+ZM/HD550LAD+ZM/HD700LAD+ZM | |
SGMCC+ZM/SGHCD+ZM/SGH340D+ZM/SGH400D+ZM/SGH490D+ZM/SGH540D+ZM | |
Coating | ZM20-ZM600g/m2 |
Spangle | Regular spangle/ Zero spangle |
Sizes | Thickness 0.8-4.5mm Width: 750-1600mm |
