High-quality carbon structural steel: In addition to carbon (C) element and a certain amount of silicon (Si) (generally not exceeding 0.40%) and manganese (Mn) (generally not exceeding 0.80%) for deoxidation, the steel can be as high as 1.20% Alloying elements, free of other alloying elements (except residual elements). This steel must guarantee chemical composition and mechanical properties.

PPGI stands for pre-painted galvanized iron sheets/coils which are made by coating galvanized steel sheets with several layers of paint & coatings under controlled conditions in a continuous coil coating line (CCL). These products have high durability as well as chemical resistance properties making them ideal for many industrial applications like roofing sheets/Walling/Cladding materials for the construction industry etc.
The popularity of these products lies not only in their durability but also in their aesthetic appeal because they come in different colors that give your buildings an elegant look while also providing protection against weather elements (rain/sun).
There are various uses for these products including:

Subsequently several important sub-categories of stainless steels have been developed. The sub-categories are austenitic, martensitic, ferritic, duplex, precipitation hardening and super alloys.