Corrosion resistant austenitic stainless steel

C - Chemistry – Metallurgy – 22 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C22C 38/44 (2006.01) C22C 38/02 (2006.01) C22C 38/34 (2006.01) C22C 38/42 (2006.01) C22C 38/58 (2006.01)

Patent

CA 2355109

An alloy having a composition, by weight, of about 0.025 % or less carbon, about 0.5 to about 4.1 % manganese, about 5.5 to about 6.2 % silicon, about 11 to about 15 % chromium, about 9.0 to about 15.5 % nickel, about 0.8 to about 1.2 % molybdenum and about 0.8 to about 2 % copper and the remainder being essentially iron with incidental impurities. This composition results in lean alloy content in a high silicon austenitic stainless steel for concentrated sulfuric acid service while maintaining a corrosion rate similar to and competitive with existing alloys for such service. Acceptable characteristics were found when hot working was carried out in the range of about 2100 °F to about 2200 °F. Annealing in the range of about 1925 °F to about 2025 °F is preferred, as is rapid water quenching after annealing.

L'invention concerne un alliage dont la composition représente en pourcentage pondéral, environ 0,025 % ou moins de carbone, environ 0,5 à environ 4,1 % de manganèse, environ 5,5 à environ 6,2 % de silicium, environ 11 à environ 15 % de chrome, environ 9,0 à environ 15,5 % de nickel, environ 0,8 à environ 1,2 % de molybdène et environ 0,8 à environ 2 % de cuivre, le reste étant constitué essentiellement de fer comportant des impuretés fortuites. Cette composition donne un acier inoxydable austénitique à teneur élevée en silicium et à teneur faible en alliage, utile dans un environnement d'acide sulfurique concentré et conservant cependant un taux de corrosion similaire à celui d'alliages existants et concurrents, destinés à une telle utilisation. On obtient des caractéristiques acceptables lorsqu'on travaille cet alliage à chaud, dans une plage de température comprise entre environ 2100 et 2200 DEG F. On préfère exécuter un recuit dans une plage de température se situant entre environ 1925 et 2025 DEG F, de même qu'on préfère un durcissement rapide à l'eau après le recuit.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Corrosion resistant austenitic stainless steel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Corrosion resistant austenitic stainless steel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Corrosion resistant austenitic stainless steel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1733879

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.