Patents Examined by W. Bean
  • Welding material for low coefficient of thermal expansion alloys
    Patent number: 5304346
    Abstract: The invention provides a welding material for welding iron containing low CTE alloys. The filler metal contains 25-55% nickel, 0-30% cobalt, 0.05-0.5% carbon, 0.25-5% niobium and balance iron with incidental impurities. The welding material also is operable with fluxes for submerged arc welding. In addition, the welding material may be configured to function as a flux coated or flux-cored electrode.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: April 19, 1994
    Assignee: INCO Alloys International, Inc.
    Inventors: David B. O'Donnell, Robert A. Bishel