Sold under the specifications ASTM A1035 Grades 100 and 120, ChromX 4100 and MMFX2 high-strength, corrosion-resistant steels are used in bridges and highways, high-rise buildings, sea walls, ports, marinas, and several commercial and industrial applications. MMFX2 has been independently proven to be five times more corrosion-resistant and up to twice as strong as conventional steel. MMFX Steel Corporation of America. Booth 241