Abstract
Abstract Small tensile specimens made from low-carbon, carbon-moly, 2¼ Cr-1 Mo, 5 Cr-Mo-Si, 9 Cr-Mo-Si, 12 Cr, 18 Cr-8 Ni, 25 Cr-20 Ni, and 5 Cr-Mo-Ti steels were placed in a steam reaction chamber at 1200 F and stressed in tension for periods of time ranging from 10 hr to 7700 hr. Data were taken on time to rupture, elongation, reduction in area, depth of scale layer, effect of type of flow, and type and angle of fracture. A photomicrographic study was made of the ruptured specimens. The straight-line relationship between stress and time to rupture on log-log co-ordinates postulated by White, Clark, and Wilson for tests in air also holds for tests in steam.
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