LOW-ACTIVATED RADIORESISTANT WELD MATERIAL Russian patent published in 2003 - IPC

FIELD: applicable in nuclear power for making weld joints of reactor bodies from low-activated radioresistant steel. SUBSTANCE: welding wire contains elements in the following amounts, wt.%: carbon 0.05-0.10; silicon 0.15-0.30; manganese 0.7-1.1; chromium 2.5-3.5; vanadium 0.15-0.25; tungsten 1.2-2.0; molybdenum 0.005-0.05; nickel 0.005-0.05; cobalt 0.005-0.02; copper 0.03-0.10; aluminum 0.01-0.05; niobium 0.005-0.05; titanium 0.05-0.10; nitrogen 0.01-0.015; oxygen 0.005-0.01; sulfur 0.006-0.01; phosphorus 0.006-0.01; arsenic 0.005-0.01; tin 0.001-0.005; antimony 0.001- 0.005; calcium 0.005-0.05, the balance, iron. Ratio of tungsten, titanium, calcium and oxygen is controlled. EFFECT: higher efficiency of use of claimed weld material due to its low level of induced activity and more rapid its decay after neutron exposition, higher resistance to brittle failure of weld metal. 4 cl, 3 tbl