Strength tests of SUS304 stainless steel weld joint at elevated temeperature(III) and strength tests of Mod.9Cr-1Mo forging steel at elevated temperature (I)

not registered; not registered; Sukekawa, Masayuki*; not registered

Strength tests of SUS304 stainless steel welded joint and Mod.9Cr-1Mo forging base metal at elevated temperature were carried out for the purpose of getting data needed for prototype Fast Breeder Reactor and Demonstration plant. Same as last year's, examined materials were welded joints of SUS304 plate (40t) and SUS304 forging (350t). For base metal test, Mod.9Cr-1Mo forging (550t) were applied. Creep test, bending creep and fatigue test of welded joint of SUS304 plate and SUS304 forging, and creep test of weld metal were carried out. Tensile test, creep test and fatigue test of Mod.9Cr-1Mo forging were carried out. Results of these tests are as follows. (1)308 weld metal and welded joint of 304 plate and forging show that their creep strength are higher than those of Material Strength Standard, PNC. (2)Bending creep fatigue strength of welded joint of plate and forging are a little higher than those strength on axial load at 500C and are a considerable higher than those at 500C. (3)Tensile strength, creep strength and fatigue strength of Mod.9Cr-1Mo forging steel are same as Material Strength Standard, PNC (preliminary). And there are no significant difference between two data of surface and middle of forging.