HIGH STRENGTH ELECTRICALLY WELDED STEEL TUBE FOR BOILER EXCELLENT IN HIGH TEMPERATURE PROPERTY

摘要

PURPOSE: To provide a high strength resistance welded steel tube for a boiler excellent in high temp. properties. ;CONSTITUTION: This is a high strength resistance welded steel tube for a boiler excellent in high temp. properties characterized by executing normalizing after tube making in a resistance welded steel tube having a componnetal compsn. of, by weight, 0.15 to 0.30% C, 0.05 to 0.50% Si, 0.25 to 1.5% Mn, 0.005 to 0.010% N, 0.02 to 0.10% Cu and 0.001 to 0.004% Ca or furthermore added with 0.01 to 0.10% Mo, and the balance Fe with inevitable elements. In this way, the objective resistance welded steel tube for a boiler high in creep strength as well as excellent in workability and weldability and moreover inexpensive in cost can be obtd.;COPYRIGHT: (C)1993,JPO&Japio