M is not less than 30 years the service life more than 50 years.
Galvanized aluminum alloy sheet.
Durability up to 25 years service life up to 30 years.
Nb handy maintains a breadth of metal inventory ready to service your hvac fabrication needs with over 80 standard stocked sizes of sheet and more than 20 varying widths of coils and slit coil we can deliver galvanized galvanneal stainless and aluminum flat rolled products next day in most markets.
The temperature of thermal deformation from 115 to 165 c for different aluminum alloys.
When discussing the galvanization of aluminum there are two agents we need to talk about.
Sodium hydroxide is the first of these used on aluminum as well as other metals such as iron and nickel.
In 1972 bethlehem steel developed galvalume 1 sheet steel consisting of 55 aluminum 43 5 zinc and 1 5 silicon it is applied via a continuous hot dip process over the base metal.
For steel above 300 с.
This zinc iron alloy coating has a uniform matte grey spangle free appearance without wipe lines on the surface.
Carbon steel sheet is processed through a molten zinc bath and continuously run in an annealing furnace enhancing physical and surface properties with a ratio of zinc iron alloy of 8 to 12.