... QB1319 or JIS Z 1535 Protect: Steel, Powder Metallurgy,Silicon Steel, Aluminum Specification: width of 787mm ... alloy steel, cast iron, steel phosphide, blued steel, powder metallurgy, oriented and non-oriented silicon steel, aluminum, ... beautiful, do not change state of metal surface4. VCI volatilizes slowly, over 2 years of antirust term5. ... is 1 year since leaving factory VCI Paper for Iron & Steel