Galvanized Sheet Metal Zinc Thickness

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Galvanized sheet metal zinc thickness.

A coil to coil process steel sheets from 0 010 to 1 70 inches 0 25 mm to 4 30 mm thick and up to 72 inches 1 830 mm wide is passed as a continuous ribbon through cleaning baths and molten zinc at speeds up to 600 feet per minute. The coating thickness ranges from an average of 7 µm on the zi00 sheet to 42 µm on the heaviest z600 sheet. And astma653 a653m 94 standard specification for sheet steel zinc coat galvanized or zinc iron alloy coated galvanized by the hot dip process. For example an astm a653 class g90 sheet contains 0 90 oz ft 2 of zinc or about 0 45 oz ft 2 per side.

Garfield avenue los angeles ca 90040. In a coating weight of 40 there are 0 4 ounces of zinc per square foot of steel and in 60 there are 0 6 ounces of zinc per square foot of steel. Kynar galvalume steel for metal roofing and gutters. These measurements are based on astm a924 924m 94 standard specification for general requirements for sheet steel metallic coated by the hot dip process formerly astma525.

It is also important to remember for all continuous galvanized sheet materials including electrogalvanized the coating weight is given for the total for both sides of the sheet. The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. Kynar aluminum for metal roofing. Gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet.

There are two coating weights used to specify zinc coated steel doors and frames. The thickness of the zinc coating is carefully controlled in the manufacturing process by air wiping the sheet as it comes out from the galvanizing bath. Continuous sheet galvanizing is also a hot dip process but is only applied to steel sheet strip and wire. The corrosion resistance provided by the zinc coating is in direct proportion to the coating s thickness.

The z600 coating 42 µm on both sides can achieve a service life of up to 80 years. Use it as an alternative to lead for sound barriers and vibration dampers as well as for emi rfi shields and architectural sheeting. Initial cost will always be considered when. Sheet metal measuring tools.