Galvanized Sheet Metal Zinc Thickness

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.

Galvanized sheet metal zinc thickness.

There are two coating weights used to specify zinc coated steel doors and frames. 0 7 mm 0 8mm and 1 5 mm. 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.

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. 0 027 or 0 032 for seamless gutters and any other thickness for custom gutters. Sheet metal measuring tools. 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.

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. 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. Kynar aluminum for metal roofing. 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.

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. Continuous sheet galvanizing is also a hot dip process but is only applied to steel sheet strip and wire. Initial cost will always be considered when.

Click here for more. And astma653 a653m 94 standard specification for sheet steel zinc coat galvanized or zinc iron alloy coated galvanized by the hot dip process. Garfield avenue los angeles ca 90040. Kynar galvalume steel for metal roofing and gutters.