Accession Number : AD0278630

Title :   INFLUENCE OF BORON, TITANIUM, ALUMINUM, AND ZIRCONIUM ON HIGH TEMPERATURE PROPERTIES OF FE-CR-NI ALLOYS

Corporate Author : NAVAL AIR ENGINEERING CENTER PHILADELPHIA PA AERONAUTICAL MATERIALS LAB

Personal Author(s) : SIPES,WILLIAM A.

Report Date : 12 JUL 1962

Pagination or Media Count : 1

Abstract : To confirm the beneficial effects claimed for minor alloying additions of incongruous elements, producer's experimental Fe-Cr-Ni alloys so modified were studied in connection with their suitability for use as aircraft power plant materials. The alloys were W-545 (Westinghouse) and Unitemp 212 (Universal Cyclops). The W-545 alloy may be considered an Fe-Cr-Ni-Mo lloy, a boron modification of Discalloy. Both materials could be included in the more general classification of austenitic precipitation hardenable stainless steels. The stress-rupture test data for the W-545 alloy, except for the value obtained at 1300 F which was 10,000 psi lower, agreed with the producer's published values for the material. Except for the anomaly noted, W-545, on an equal strength basis, can be used at a temperature 100 F higher than Discalloy, an alloy not having the boron addition. The Unitemp 212 stressrupture data confirm the producer's published values. Conclusions: W-545 and Unitemp 212 demonstrate th be ficial effects of incongruous alloy additions. Fe-Cr-Ni alloys, as well as other au tenitic alloys (iron-nickel-manganese) can be greatly benefited by judicious additions of incongruous alloying elements.

Descriptors :   ALUMINUM, ALUMINUM ALLOYS, AUSTENITE, BORON, BORON ALLOYS, RUPTURE, STAINLESS STEEL, STRESSES, TITANIUM, TITANIUM ALLOYS, ZIRCONIUM, ZIRCONIUM ALLOYS

Distribution Statement : APPROVED FOR PUBLIC RELEASE