Material Properties of High Cr-Mo Steel (III) Mechanical Properties of HCM12A(FBR) after Thermal Aging

Ando, Masanori ; Kato, Shoichi ; Yoshida, Eiichi; Suzuki, Takaichi*

In the FBR components,cyclic thermal loads are predominant and creep deformation must be taken into account.Therefore,the applicability of high chromium ferritic steel for structural material of the future advanced Fast Breeder Reactor is investigated in the feasibility study on commercialized FBR cycle systems,since both of thermal properties and high temperature strength of the steel are superior to those of conventional austenitic stainless steels. In this study, tensile, hardness,impact and relaxation tests are conducted in order to evaluate the basic mechanical properties of each HCM12A (2001-FBR). The material is aged at 600C for 3000h and 6000h. The aged materials are also tested as well as the as-received one. As a result, the following conclusions are obtained;