Alloy and composite steel tube with corrosion resistance in comb

Details Alloy and composite steel tube with corrosion resistance in comb Alloy and composite steel tube with corrosion resistance in comb

1991-12-20

1993-03-02

Yee, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

138177, 138DIG6, 420585, 420440, C22C 300, B32B 1500

Patent

active

051908328

ABSTRACT:
An alloy exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises, in weight percent, not more than 0.05% C, 0.02-0.5% Si, 0.02-0.5% Mn, 15-35% Cr, 0.5-4% Mo, more than 40% but not more than 60% Co, 5-15% Fe, 0.5-5% W, 0.0003-0.005% Ca and the remainder of Ni at a content of not less than 4% and unavoidable impurities, provided that Cr (%)+0.5Ni (%)+3Mo (%).gtoreq.30 (%). A composite steel tube exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises an inner tube constituted of Cr-containing boiler tube and an outer tube constituted of the alloy.

REFERENCES:
patent: 3268327 (1966-08-01), Binder
patent: 4463061 (1984-07-01), Otoguro et al.
Key to Steels, 10 Edition 1974, West Germany.

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