Stainless wrought and cast materials and welding additives for s

Details Stainless wrought and cast materials and welding additives for s Stainless wrought and cast materials and welding additives for s

1990-09-14

1992-06-09

Roy, Upendra

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 50, 420117, 420118, 422160, 422161, 423522, C22C 3834

Patent

active

051204967

ABSTRACT:
In the processing of hot concentrated sulfuric acid or oleum in steel apparatus, the improvement wherein said apparatus is formed of an alloyed material comprising an iron-chrome-nickel-silicon alloy containing 13 to 32% by weight Cr, 5 to 25% by weight nickel and 4 to 9% by weight Si and having a structure containing more than 10% delta-ferrite.

REFERENCES:
patent: 3663215 (1972-05-01), Tanczyn
patent: 4002510 (1977-01-01), Wilde
patent: 4363660 (1982-12-01), Wakita et al.
patent: 4640817 (1987-02-01), Kajimura et al.
patent: 4751046 (1988-06-01), Simoneau
patent: 4917860 (1990-04-01), Culling

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