Accession Number : AD0286236

Title :   MATERIAL - 4340 (260-292 KSI) PHOSPHATIZED - HYDROGEN EMBRITTLEMENT - STUDIES OF

Corporate Author : GENERAL DYNAMICS/CONVAIR SAN DIEGO CALIF

Personal Author(s) : PRATT,W.M.

Report Date : 06 JUL 1962

Pagination or Media Count : 1

Abstract : The object of this study was to determine whether a newly proposed phosphating treatment would cause H2 embrittlement of 4340 steel heat treated to 260-292 ksi ultimate tensile strength. Loads for the static loading tests were calculated on a percentage basis from the average notched tensile strength val es. Microscopic examination revealed a heavier coating on the specimens treated with the 60 point solution for 5 minutes than on those treated with the 12.5 point solution for 20 minutes. 9author)

Descriptors :   *HYDROGEN, *STEEL, COATINGS, HEAT TREATMENT, PHOSPHATES, SOLUTIONS(MIXTURES), TESTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE