Heat resisting alloys, exhaust valves and knit meshes for cataly

Details Heat resisting alloys, exhaust valves and knit meshes for cataly Heat resisting alloys, exhaust valves and knit meshes for cataly

1997-04-09

1998-07-14

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

4205841, C22C 3848

Patent

active

057799725

ABSTRACT:
A heat resisting alloy of Fe--Cr--Ni type for exhaust valves, knit meshes for the catalyzer and the like which is low in price and excellent in high temperature properties, which consists essentially by weight percentage of C:0.01.about.0.10%, S:.ltoreq.2.0%, Mn .ltoreq.2.0%, Cr:14.about.18%, Nb+Ta:0.5.about.1.5%, Ti:2.0.about.3.0%, Al:0.8.about.1.5%, Ni:30.about.35%,B:0.001.about.0.01%, Ca+Mg:0.001.about.0.01%,Cu.ltoreq.0.5%, P.ltoreq.0.02%, S.ltoreq.0.01%, O.ltoreq.0.01%, N.ltoreq.0.01%, and the balance of Fe, additionally the total atomic percentage of Al, Ti, Nb and Ta:5.0.about.7.0%, and atomic percentage ratio of Ti/Al:1.0.about.1.5, and M-value calculated from the following equation .ltoreq.0.95; Ti(at. %)+2.117 Nb(at. %)+2.224 Ta(at. %)+1.001 Mn(at. %)+1.90 Si(at. %)!/100.

REFERENCES:
patent: 5567383 (1996-10-01), Noda et al.

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