The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2011
Filed:
Apr. 25, 2003
Marco Mario Tivelli, Veracruz, MX;
Alfonso Izquierdo Garcia, Veracruz, MX;
Dionino Colleluori, Veracruz, MX;
Guiseppe Cumino, Veracruz, MX;
Marco Mario Tivelli, Veracruz, MX;
Alfonso Izquierdo Garcia, Veracruz, MX;
Dionino Colleluori, Veracruz, MX;
Guiseppe Cumino, Veracruz, MX;
Tubos De Acero De Mexico S.A., , MX;
Dalmine S.p.A., , IT;
Abstract
The present invention pertains to steel with high mechanical resistance at room temperature and up to 130° C., good toughness and good corrosion resistance in the metal base as well as good resistance to cracking in the heat affected zones (HAZ) once the tubing is welded together, and more specifically to heavy gauge seamless steel tubing with high mechanical resistance, good toughness and good corrosion resistance called catenary conduit. The advantages of the present invention with respect to those of an the state of technology reside in providing a chemical composition for steel used to manufacture heavy gauge seamless steel tubing with high mechanical resistance, good toughness, good fissure resistance in the HAZ and good corrosion resistance and a process for manufacturing this product. These advantages are obtained by using a composition made up basically of Fe and a specific chemical composition.