Patents Assigned to S.A. Echevarria
  • Leaded steel bar free of lead macroinclusions
    Patent number: 4056387
    Abstract: Leaded steel bar containing 0.05-0.70 wt. % lead. No substantial amount of complex macroinclusions in immediate sub-surface region, the machinability of which is relatively high. Process for making such leaded steel is described.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: November 1, 1977
    Assignees: Inland Steel Company, S.A. Echevarria
    Inventors: Gregorio Asua Cantera, Jose M. Palacios Reparaz, Louis Molnar