An ASTM A995 4A gate valve is a linear-motion isolation valve cast from Grade 4A duplex stainless steel (UNS S32205 / CD3MN), engineered to handle highly severe-service fluids containing abrasive solids and high chloride concentrations. The specialized 4A duplex microstructure consists of a balanced 50/50 phase mix of ferrite and austenite, delivering double the yield strength of standard austenitic stainless steels along with elite resistance to stress corrosion cracking (SCC), erosion, and mechanical fatigue. ASTM A995 4A gate valves are heavily specified for marine offshore platforms, geothermal energy loops, chemical slurry processing, and subsea manifold systems. Offshore contractors and procurement directors can secure superior mechanical strength and eliminate chloride stress cracking by importing cast ASTM A995 4A gate valves straight from specialized manufacturers in China via our advanced B2B digital marketplace.
