Burst testing of alloys 800 and 310 at 1,255 K (1,800/sup 0/F) with a simulated coal gasification atmosphere

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Several corrosion- and heat-resistant alloys are being considered for long term applications in coal gasification plants at temperatures up to 1.255/sup 0/K in high pressure environments of mixed hydrogen, water, hydrocarbons, and sulfides. A method for in situ testing has been developed for short time mechanical tests of candidate alloys in high pressure, high temperature, gaseous environments, referred to as coal gasification atmosphere (CGA). The method involves bursting thin-walled tubes, using various gases to produce the burst hoop stress. The short time 1.255/sup 0/K burst and creep rupture strength and ductility properties of alloys 800 and 800H in a mixed ... continued below

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Pages: 49

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Dixon, C. E. May 1, 1976.

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Several corrosion- and heat-resistant alloys are being considered for long term applications in coal gasification plants at temperatures up to 1.255/sup 0/K in high pressure environments of mixed hydrogen, water, hydrocarbons, and sulfides. A method for in situ testing has been developed for short time mechanical tests of candidate alloys in high pressure, high temperature, gaseous environments, referred to as coal gasification atmosphere (CGA). The method involves bursting thin-walled tubes, using various gases to produce the burst hoop stress. The short time 1.255/sup 0/K burst and creep rupture strength and ductility properties of alloys 800 and 800H in a mixed gas environment, H/sub 2/, CO, CO/sub 2/, CH/sub 4/, SO/sub 2/ (CGA), are not reduced from properties obtained in air. However, the stress- and pressure-accelerated corrosion is more severe in CGA. It is expected that CGA will reduce long term strength and ductility in alloy 800 as a result of the accelerated corrosion. The short time 1.255/sup 0/K strengths of alloy 310 in CGA and pure hydrogen environments are reduced from the values obtained in air by less than 10 percent. The ductilities (total circumferential elongation) are good--approximately 20 percent for all test conditions. The CGA stress- and pressure-accelerated corrosion is greater than in air. Longer time tests in CGA are expected to result in additional strength degradation. Limited creep/fatigue tests of alloy 310 in hydrogen show that hold times are significant. A greater cyclic life is observed using an 8-second hold time than a 55-second hold time.

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Pages: 49

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  • Report No.: ANCR-1311
  • Grant Number: E(10-1)-1375
  • DOI: 10.2172/7345661 | External Link
  • Office of Scientific & Technical Information Report Number: 7345661
  • Archival Resource Key: ark:/67531/metadc1445120

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 1976

Added to The UNT Digital Library

  • Feb. 10, 2019, 8:45 p.m.

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Dixon, C. E. Burst testing of alloys 800 and 310 at 1,255 K (1,800/sup 0/F) with a simulated coal gasification atmosphere, report, May 1, 1976; United States. (https://digital.library.unt.edu/ark:/67531/metadc1445120/: accessed March 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.