PROBLEM TO BE SOLVED: To provide a structural material qualitative evaluation system and structural material qualitative evaluation method capable of evaluating quality of a structural material by determining susceptibility for stress corrosion cracking and service life.;SOLUTION: The structural material qualitative evaluation system 1 has a limit stiffness information database (DB) 7 for storing limit stiffness information of limit stiffness at the time that determination object of quality evaluation becomes to present the susceptibility for stress corrosion cracking to an extent unable to ignore and a susceptibility determining means 6 for stress corrosion cracking for determining whether stiffness of determining object is lower than the limit stiffness or not by inputting stiffness of the determining object and referring to the limit stiffness information of the limit stiffness information database (DB) 7 and in the case that the stiffness of the determining object is lower than the limit stiffness, determination result of having no susceptibility for stress corrosion cracking is output and in the case that the stiffness of the determining object is not lower than limit stiffness, determination result of having susceptibility for stress corrosion cracking is output.;COPYRIGHT: (C)2005,JPO&NCIPI
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