Abstract
Physical properties, including firing shrinkage, density, modulus of rupture from 75° to 2400°F., stress‐rupture life in cross bending and in tension at 1800° and at 2000°F., modulus of elasticity, tensile strength from 75° to 2000°F., comparative impact resistance, oxidation resistance, thermal expansion, and thermal‐shock resistance, for the composition 28% alumina‐72% chromium combine to indicate the potential value of this material in high stress applications at elevated temperatures where severe thermal shock may be encountered. While the thermal‐shock resistance is much better than that possessed by the low‐chromium high‐alumina bodies discussed in Part V, the mechanical properties at elevated temperatures do not appear to suffer as a result of the highly continuous metal phase in the more recently developed body.
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