FERRITIC STAINLESS STEEL

The ferritic grades listed below exhibit corrosion resistance over a very wide range. All are subject to severe embrittlement after prolonged exposure in the 700–1100 F (370–600 C) temperature range. Alloy 409 is weldable and is the alloy used for automotive exhaust systems and catalytic converter shells. It has some useful high-temperature oxidation resistance to about 1200 F (650 C). In plate gauges it may be welded with ERNiCr-3 for better toughness. Alloy 409 is not suited for decorative applications as it may rust from exposure to weather. Alloy 416 is free machining, available both as a ferritic and a martensitic version; 430 is commonly used for decorative purposes as well as food-handling equipment. E-BRITE has chloride-pitting resistance equal or superior to 316L and practical immunity to chloride SCC. E-BRITE is currently available only as tubing for heat exchangers. AL29-4-C is extremely resistant to chloride pitting and is used for heat exchanger applications, available only as tubing or thin strip.

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STAINLESS STEELS

James Kelly

Rochester, Michigan

Mechanical Engineers’ Handbook: Materials and Mechanical Design, Volume 1, Third Edition.

Edited by Myer Kutz

Copyright  2006 by John Wiley & Sons, Inc.

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