Inventor
NAKASUGI HAJIME
9 patents
Patents
9 patentsUS4138278AFeb 6, 1979
Method for producing a steel sheet having remarkably excellent toughness at low temperatures
NIPPON STEEL CORP25 citations80
US4219371AAug 26, 1980
Process for producing high-tension bainitic steel having high-toughness and excellent weldability
NIPPON STEEL CORP25 citations79
US4105474AAug 8, 1978
Process for producing a high tension steel sheet product having an excellent low-temperature toughness with a yield point of 40 kg/mm2 or higher
NIPPON STEEL CORP16 citations78
US3976514AAug 24, 1976
Method for producing a high toughness and high tensil steel
NIPPON STEEL CORP20 citations78
US4062705ADec 13, 1977
Method for heat treatment of high-toughness weld metals
NIPPON STEEL CORP28 citations77
US4142713AMar 6, 1979
Method of heat-treatment of welded pipe and apparatus therefor
NIPPON STEEL CORP26 citations73
US3979231ASep 7, 1976
Method for producing large diameter steel pipes
NIPPON STEEL CORP14 citations71
US3973999AAug 10, 1976
Method for producing a high tensile strength and high toughness bend pipe
NIPPON STEEL CORP9 citations69
US4115675ASep 19, 1978
Induction heating method of steel pipe
NIPPON STEEL CORP6 citations57