Continuously hot-dip flat rolled products | Zinc alloy coating (+ Z)
This coating consists of a 99% zinc alloy.
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The coating amount typically ranges between 100 and 350 g/m2, although coatings up to 600 g/m2 are available.
Specific weight of the coating 7.1 g/m2 per micron of coating.
The available surface aspects are:
“N”: Normal crystal. Generally not widespread.
“M” : Microcrystal. Smaller crystal and, in some cases to the point of becoming invisible to the inexperienced eye. The standard does not define dimensional limits.
The surface finishes available are:
“A” : Surface with permissible imperfections such as, for example, small lumps of zinc, fingerprints, scratches, small cavities, changes in appearance, dark spots, passivation stains. The surface can be supplied with light rolling (Skin-pass) or in the coated condition, at the discretion of the manufacturer. The surface can vary from opaque, semi-opaque to bright. Specific needs in this regard must be clarified at the time of placing the order. This type of surface is generally not recommended for painting.
“B”: Improved surface, obtained by means of light rolling (Skin-pass), with possible slight imperfections such as, for example, skin-pass marks, light scratches, light passivation stains; generally not very sensitive to the touch. The surface is opaque and suitable for painting.
“C”: High quality surface, obtained by means of light rolling (Skin-pass), practically free from touch-sensitive defects. The surface is opaque and the one that has been controlled is suitable for the application of a high quality paint.
Continuously hot-dip flat rolled products | Aluminium-zinc alloy coated (+AZ)
The coating is made up of 55% aluminium alloy, 1.6% silicon and the remaining percentage is zinc.
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The coating is made up of 55% aluminium alloy, 1.6% silicon and the remaining percentage is zinc.
The amount of coating typically ranges between 100 and 185 g/m2.
The specific weight of the coating is 3.8 g/m2 per micron of coating.
The surface appearance has a variable size crystal formation with a characteristic metallic lustre.
The surface finishes available are:
“A” : Surface with permissible imperfections such as, for example, small lumps of zinc, fingerprints, scratches, small cavities, changes in appearance, dark spots, passivation stains. The surface can be supplied with light rolling (Skin-pass) or in the coated condition, at the discretion of the manufacturer. The surface is generally semi-opaque or bright. Specific needs in this regard must be clarified at the time of placing the order. This type of surface is generally not recommended for painting.
“B”: Improved surface, obtained by means of light rolling (Skin-pass), with possible slight imperfections such as, for example, skin-pass marks, light scratches, light passivation stains; generally not very sensitive to the touch. The surface is opaque and suitable for painting.
“C”: High quality surface, obtained by means of light rolling (Skin-pass), practically free from touch-sensitive defects. The surface is opaque and the one that has been controlled is suitable for the application of a high quality paint.
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Continuously hot-dip flat rolled products | Aluminium-silicon alloy coated (+AS)
The coating is made up of an 8-11% silicon alloy, and the remaining percentage is aluminium.
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The amount of coating typically ranges between 60 and 150 g/m2. The specific weight of the coating is 3.0 g/m2 per micron of coating.
This type of coating is particularly suitable for high temperature applications of up to around 650°C (for example, hoods, oven components, etc.).
The surface appearance has a variable-size crystal formation, which can even be quite evident and gives the surface an even opaque aluminium grey appearance.
The surface finishes available are:
“A” : Surface with permissible imperfections such as, for example, small lumps of zinc, fingerprints, scratches, small cavities, changes in appearance, dark spots, passivation stains. The surface can be supplied with light rolling (Skin-pass) or in the zinc-coated condition, at the discretion of the manufacturer. The surface is generally semi-opaque or bright. Specific needs in this regard must be clarified at the time of placing the order. This type of surface is generally not recommended for painting.
“B”: Improved surface, obtained by means of light rolling (Skin-pass), with possible slight imperfections such as, for example, skin-pass marks, light scratches, light passivation stains; generally not very sensitive to the touch. The surface is generally bright.
“C”: High quality surface, obtained by means of light rolling (Skin-pass); in the cast of aluminates, there may be small uncoated points with a diameter < 1 mm, that do not make it suitable for the application of aesthetic finishes.
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Continuously hot-dip flat rolled products | Magnesium-zinc alloy coated (+ZM)
The coating is made up of an Aluminium – Zinc – Magnesium alloy with an Aluminium – Magnesium content varying between 1.5% and 8% and a minimum of 0.2% magnesium and the rest zinc.
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The amount of coating typically ranges between 60 and 430 g/m2.
The specific weight of the coating is 6.2 – 6.6 g/m2 per micron of coating.
The surface appearance is and even metallic colour that can either be semi-opaque or bright, tending towards dark grey.
The surface finishes available are:
“A” : Surface with permissible imperfections such as, for example, small lumps of zinc, fingerprints, scratches, small cavities, changes in appearance, dark spots, passivation stains. The surface can be supplied with light rolling (Skin-pass) or in the coated condition, at the discretion of the manufacturer. The surface can vary from opaque, semi-opaque to bright. Specific needs in this regard must be clarified at the time of placing the order. This type of surface is generally not recommended for painting.
“B”: Improved surface, obtained by means of light rolling (Skin-pass), with possible slight imperfections such as, for example, skin-pass marks, light scratches, light passivation stains; generally not very sensitive to the touch. The surface is opaque and suitable for painting.
“C”: High quality surface, obtained by means of light rolling (Skin-pass); in the cast of aluminates, there may be small uncoated points with a diameter < 1 mm, that do not make it suitable for the application of aesthetic finishes.