Accession Number:

AD0282927

Title:

DEVELOPMENT OF NEW AND USEFUL ELEVATED-TEMPERATURE STEELS FOR AIRCRAFT APPLICATIONS

Descriptive Note:

Corporate Author:

CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA

Personal Author(s):

Report Date:

1962-07-15

Pagination or Media Count:

1.0

Abstract:

OF THE LARGE NUMBER OF EXPERIMENTAL COMPOSITIONS INVESTIGATED, THE 0.15 C - 14.5 Cr - Mo - V - Co type steels indicated the best combination of desired characteristics and properties. A nominally 0.15 C - 14.5 Cr - 5 Mo - 0.5 V - 13.5 Co steel, Steel AFC 77, was selected for scaling-up for production on mill facilities. Steel AFC 77 has very high strength 290,000 psi tensile strength at the ambient temperature and retains its strength remarkably well up to about 1200 F 120,000 psi tensile strength at 1200 F. In fact, Steel AFC 77 has appreciably higher strength, particularly in prolonged exposures, than any stainless steel known. The excellent strength properties over a wide temperature range are accompanied by good ductility indications of good formability and weldability were also obtained. In addition to its superior mechanical properties, Steel AFC 77 is resistant to atmospheric corrosion and oxidation. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE