MY ACCOUNT ONLINE CHAT CLEARANCE Alloys Forms Processing Quality Approvals Technical Resources 347 Type 347 stainless steel has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments. Type 347 is stabilized with columbium, it is preferable for aqueous and low temperature environments due to its good resistance to intergranular attack. Both 347 and 321 offer good resistance to polythionic acid stress corrosion cracking, encountered in oil refineries. The high temperature oxidation resistance of 347 is similar to that of 304 stainless steel. Useful to 1500°F. Often in many product forms, the grain size and carbon content can meet both the 347S and 347H requirements. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes. Inventory 347 Plate, 347 Round Bar, 347 Sheet Common Trade Names 347H, 347 Stainless Specifications AMS 5512, AMS 5646, AMS 5680, ASME SA 240, ASTM A 269, ASTM A 479, ASTM A262 Practice E, MSRR 5632, PWA 300, PWA F17 LCS, UNS S34700, UNS S34709, W. Nr./EN 1.4550 Features Good creep strength up to 1500°F Maintains good corrosion resistance in applications where the temperature is between 800°F and 1500°F. Good resistance to intergranular corrosion in the as welded condition. Applications Oil Refineries Fluid catalytic cracking units (FCC) Firearms production Hanger rods Recuperator tube sheets, shell, supports Especially where temperatures exceed 550°F and resistance to sulfidation is needed Fired heater tubes Distributor trays and thermowells Equipment in and around reactors (good resistance to polythionic acid) Related Literature Data Sheet Firearms Line Card OUR COMPANY About Us FAQs Markets Careers & Internships Packaging Safety Contact LOCATIONS North America Asia Europe TOOLS & MEDIA E-Service Programs Videos Weld Wire Selection Pipe Size Chart Machining Information Current Promotions RA Mobile FOLLOW US INSTAGRAM LINKEDIN FACEBOOK YOUTUBE PAYMENT METHOD BY United States P.O. Terms Terms & Conditions Privacy Policy © Rolled Alloys, Inc. All Rights Reserved

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