Galvanized Sheet Metal Zinc Thickness

There are two coating weights used to specify zinc coated steel doors and frames.

Galvanized sheet metal zinc thickness.

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. The corrosion resistance provided by the zinc coating is in direct proportion to the coating s thickness. To obtain the amount of zinc per unit area of surface the weight given must be divided in two assuming equal distribution on both sides. Kynar aluminum for metal roofing.

Garfield avenue los angeles ca 90040. Sheet metal measuring tools. Kynar galvalume steel for metal roofing and gutters. 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.

And astma653 a653m 94 standard specification for sheet steel zinc coat galvanized or zinc iron alloy coated galvanized by the hot dip process. 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. The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. 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.

Use it as an alternative to lead for sound barriers and vibration dampers as well as for emi rfi shields and architectural sheeting. 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. 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 coating thickness ranges from an average of 7 µm on the zi00 sheet to 42 µm on the heaviest z600 sheet. The z600 coating 42 µm on both sides can achieve a service life of up to 80 years. Click here for more. 0 7 mm 0 8mm and 1 5 mm.