ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 9

A High Purity Approach to High Chromium Ferritic Stainless Steels

Matejka, WA
Vice president of technologyMember of ASTM, Airco Vacuum Metals Division, Airco, Inc., BerkeleyCalif.,

Knoth, RJ
General sales manager, Airco Vacuum Metals Division, Airco, Inc., Buncher Industrial District, Leetsdale, Pa.

Abstract

This paper discusses merits of a high chromium ferritic stainless steel with extremely low levels of carbon and nitrogen. Data are shown on effects of carbon, nitrogen, and other impurity elements on alloy corrosion properties, mechanical properties, mill processing, and fabricability. Properties of Type XM-27, a 26Cr-1Mo high purity ferritic made by electron-beam refining, are discussed for various product forms. Weldability and fabrication characteristics are reviewed with emphasis on heat exchangers and pressure vessels. Use of Type XM-27 in chemical, petroleum, and fertilizer processing equipment is described. Service performance results, in some cases showing 24-month data, are presented.

Keywords:
ferritic stainless steels, purity, construction materials, stress corrosion resistance, interstitials, stabilizers, ductile brittle transition, electron beam refining, welding, fabrication, performance, mechanical properties, heat exchangers, pressure vessels, mill processing

Paper ID: JTE10162J
DOI: 10.1520/JTE10162J
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