HEAT RESISTANCE OF METALS UNDER VACUUM
Abstract
The results of tests on heat-resistant alloy specimens at 1200 and 1300 C and at a pressure of 0.04 mm Hg show that alloys behave in different ways under vacuum. The following alloys were tested for a period of 110 hr: EI-626, EI-595, EYa-3S, EI-417, EYa-1, Kh20N77T3 and Kh20N80. The following conclusions were made: (1) when heat-resistant alloys are used in vacuum furnaces the possibility of evaporation must be taken into account; (2) for heaters operating at temperatures up to 200 C in any vacuum a double nichrome is recommended; and (3) for heaters operating at a temperature of 1300 C and at pressures of the order 0.01 mm Hg or more, the alloy EI-626 is recommended. At lower pressures and 1300 C, the alloy EI-626 cannot be used because of intensive evaporation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 13, 1961
- Accession Number
- AD0257694
Entities
People
- E.n. Marmer
Organizations
- National Air and Space Intelligence Center