MY ACCOUNT ONLINE CHAT CLEARANCE Alloys Forms Processing Quality Approvals Technical Resources 321 321 stainless is a titanium stabilized grade commonly used for service in the 1000-1600°F temperature range. For service temperatures up to about 1600°F, a stabilizing treatment at 1550-1650°F, air cool, may be used to provide optimum resistance to intergranular corrosion and to polythionic acid stress corrosion cracking. 321 stainless is readily welded by all common methods including submerged arc. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes. 321 stainless is similar in machinability to 304 stainless steel. It has a machinability rating of 45% relative to AISI B1112. Inventory 321 Pipe, 321 Plate, 321 Round Bar, 321 Sheet Common Trade Names 321, 321 Stainless, Alloy 321 Specifications AMS 5510, AMS 5645, ASME SA 240, ASME SA 312, ASME SA 479, ASTM A 240, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 312, ASTM A 479, EN 1.4541, QQS 763, QQS 766d, UNS S32100, Werkstoff 1.4541 Features Oxidation resistant to 1600°F Stabilized against weld heat affected zone (HAZ) intergranular corrosion Resists polythionic acid stress corrosion cracking Applications Aircraft piston engine manifolds Expansion joints Firearms production Thermal oxidizers Refinery equipment High temperature chemical process equipment 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