The Fascinating World of Steel: Difference Between PPGI
Mar 14, 2018· PPGL or pre-painted galvalume steel, on the other hand, is coated with a mix of aluminum, zinc and other trace elements. The usual composition of galvalume coating is 55% aluminum, 43.4% zinc and 1.6% trace elements. Attributed to the difference in their coatings, PPGI and PPGL steel consequently vary in their properties as well.