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:
Apr. 30, 2013
Filed:
Feb. 23, 2009
Applicants:
Robert Carroll, South Yorkshire, GB;
Howard Martin Smith, South Yorkshire, GB;
Shreekant Jaiswal, Chesterfield, GB;
Inventors:
Robert Carroll, South Yorkshire, GB;
Howard Martin Smith, South Yorkshire, GB;
Shreekant Jaiswal, Chesterfield, GB;
Assignee:
Tata Steel UK Limited, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/04 (2006.01); C22C 38/02 (2006.01); C22C 38/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A high-strength pearlitic steel rail with an excellent combination of wear properties and rolling contact fatigue resistance wherein the steel has 0.88% to 0.95% carbon, 0.75% to 0.92% silicon, 0.80% to 0.95% manganese, 0.05% to 0.14% vanadium, up to 0.008% nitrogen, up to 0.030% phosphorus, 0.008 to 0.030% sulphur, at most 2.5 ppm hydrogen, at most 0.10% chromium, at most 0.010% aluminium, at most 20 ppm oxygen, the remainder being iron and unavoidable impurities.