A995 6A

Grade 6A is a superaustenitic duplex stainless steel casting alloy specified under ASTM A995/A995M, developed for critical pressure-containing components operating in highly corrosive and chloride-rich environments. Its composition includes high levels of chromium, nickel, molybdenum, nitrogen, copper, and tungsten, resulting in outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. With superior strength and durability compared to lower alloy duplex grades, Grade 6A is ideal for offshore oil and gas systems, subsea equipment, chemical processing units, and seawater handling systems. It is frequently selected for demanding applications where long service life, corrosion resistance, and mechanical performance are critical.