Clifton, T. E.Whitbread, R. C.2015-09-162015-09-161965-11http://dspace.lib.cranfield.ac.uk/handle/1826/9443Introduction This memorandum reports a series of tests to determine the fatigue properties of an iridium - 5% tungsten alloy at 600°c and 700°C. A previous memorandum, Memo. Mat. 61, reports the fatigue properties at room temperature of the same alloy.enReport