Alloys or metallic compositions – Chromium base
Patent
1997-04-07
1999-02-02
Phipps, Margery
Alloys or metallic compositions
Chromium base
420451, 4205841, 420586, 420588, C22C 3000
Patent
active
058660682
ABSTRACT:
A heat-resistant alloy suitable as a material for reactor tubes such as cracking tubes for producing ethylene in the petrochemical industry consisting essentially of, in % by weight, 0.1 to 0.5% of C, over 0% to not more than 4% of Si, over 0% to not more than 3% of Mn, over 40% to not more than 50% of Cr, over 0% to not more than 10% of Fe, 0.01 to 0.6% of Ti, 0.01 to 0.2% of Zr, at least one element selected from the group consisting of 0.5 to 5% of W, 0.3 to 2% of Nb and 0.5 to 3% of Mo, and the balance substantially Ni. The alloy is excellent in oxidation resistance, high-temperature creep rupture strength, carburization resistance and ductility after aging.
REFERENCES:
patent: 5103870 (1992-04-01), Ishii et al.
Sugitani et al., Patent Abstracts of Japan, Vol. 017, No. 426, Application No. 03280672, published Apr. 16, 1993.
Makoto et al., Patent Abstracts of Japan, for Application No. 03183014, published Jan. 14, 1993.
Makoto et al., Patent Abstracts of Japan, for Application No. 01206730, published Jan. 10, 1992.
Teruo et al., Patent Abstracts of Japan, for Application No. 02036762, published Oct. 28, 1991.
Kubota Corporation
Phipps Margery
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