Patents by Inventor Mario Sarracino

Mario Sarracino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for improving the resistance to embrittlement due to hydrogen in welded joints
    Patent number: 4136814
    Abstract: Hydrogen embrittlement of welded joints in carbon steels and low-alloy structural steels is minimized by employing a steel welding wire having a nickel content related to the nickel content of the steel according to the expression:%Ni.sub.base metal +0.40%<%Ni.sub.wire <%Ni.sub.base metal +1.0%.Either molybdenum or chromium are added to the wire at such a percentage related to the nickel content that hydrogen ions are discharged at the welded seam while the alloying action with the chromium or molybdenum protects the joint from hydrogen embrittlement. The content of chromium, if present, is from 1.5 to 5 times the nickel content of the wire, while the content of molybdenum, if present, is from 0.15 to 0.50 times the nickel content.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: January 30, 1979
    Assignee: Italsider S.p.A.
    Inventors: Mario Sarracino, Arduino Lannaioli