Accession Number : AD0286845

Title :   MATERIALS-MAGNESIUM THORIUM HM21-T8 ROOM AND ELEVATED TEMPERATURE PROPERTIES-DETERMINATION OF

Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s) : GLORIOSO,S.V.

Report Date : 31 OCT 1958

Pagination or Media Count : 1

Abstract : Ultimate tensile strength, tensile yield strength, % elongation for each tensile specimen, and the ultimate shear strength for each spot weld are presented. The effect of temperature on ultimate strength, yield strength and % elongation for specimens held at test temperature 1 minute and 2 hours was determined. Tensile data for HM21-T8 sheet at room temperature are listed in the literature as Ftu equals 34,000 psi, Fty equals 25,000 psi and elongation equals 10% for gages up to .125 in. Because the room temperature tensile data for 0.63 gage were not in agreement with the vendor's data, these tests were duplicated using .090 gage material. The room temperature properties for .090 gage HM21T8 compare favorably with the above data. Specimens which were spot welded using severe machine settings had higher shear strengths for every sheet gage combination. When using these settings average strengths were increased from 18 to 65% depending on the sheet gage combination. (Author)

Descriptors :   *INTERMETALLIC COMPOUNDS, *MAGNESIUM ALLOYS, *THORIUM ALLOYS, ALLOYS, ELASTIC PROPERTIES, MECHANICAL PROPERTIES, SHEETS, SPOT WELDING, SPOT WELDS, TEMPERATURE, TENSILE PROPERTIES, WELDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE