A995 7A

Grade 7A is a highly alloyed duplex stainless steel casting alloy specified by ASTM A995/A995M, engineered for extreme service conditions involving high chloride concentrations and aggressive chemical environments. It features elevated levels of chromium, nickel, molybdenum, nitrogen, and tungsten, forming a dual-phase microstructure that offers exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. Designed for superior performance in harsh environments, Grade 7A is commonly used in subsea oil and gas equipment, chemical reactors, desalination plants, and other critical infrastructure where strength, corrosion resistance, and long-term durability are paramount. It is particularly effective in resisting corrosion in seawater and sour service applications.