G60 Vs G90 Sheet Metal

How long will a galvanized g40 g60 g90 coating last.

G60 vs g90 sheet metal. Hot dipped galvanized coatings. 90 signifies the quantity of the zinc coating on the steel sheet. Generally speaking if a g30 coated steel product lasts five years until it starts to red rust or corrode then a g60 will last 10 years and a g90 will last 15 years. Similarly a g90 coating is approximately 50 thicker than a g60 coating and thus would be expected to perform 50 better in terms of time to 10 rust.

How long the galvanization lasts depends primarily on the site conditions i e. I hope this helps steve sarten. G30 g40 g60 and g90. G90 galvanized steel has a longer service life than g60 g40 and g30 galvanized steel because g90 galvanized steel has a heavier coating weight of zinc applied to it at 0 90 oz ft 2 as opposed to g60 galvanized steel at 060 ox ft 2 and so on.

There are other thickness of coating g140 which designates 1 40 oz square foot g60 which designates 0 30 oz square foot. In other words a g60 coating has twice the thickness of a g30 coating and the life of the product in a given environment is approximately twice as long. 4specs discussion forum a60 vs g60 galvanized steel. The g60 is the most common galvanized metal and determines the amount of galvanize on the metal.

G90 designates a coating of 0 90 oz square foot. This weight is the total weight of zinc on both sides of the sheet i e 0 45 oz square foot on each side. Limits on maximum acceptable coating weights for an application are usually given by other factors such as cost or formability. I believe that the g90 coating for steel sheet is a coil coating.

A wide variety of g30 g60 g90 galvanized coils and sheet options are available to you such as aisi astm and gb. G90 is not a galvanizing specification. With steel sheet there are several fabrication processes that it takes to make it into not just a stud but a stud wall. G30 g60 g90 galvanized coils and sheet g30 g60 g90.

If it is for outdoor use or in a high moisture environment i would always specify g90 just because it seems to make a difference over time. Temperature exposure moisture etc with a linear relationship between coating thickness and ability to resist corrosion. The g90 would be more galvanized coating than say g60. Evaluation of g60 vs g90 galvanizing with respect to cold formed metal framing studs in exterior wall construction and interior metal stud or other architectural components.

Also for use in sheet metal. 2003 this entry appended to this thread by editor in lieu of spawning a duplicative thread. Nonetheless it is a coating of steel sheet before fabrication.