STP1125: Reconstituted Impact Specimens with Small Inserts

    Klausnitzer, EN
    Deputy director and main group leader, SIEMENS AG KWU/E11, Erlangen,

    Hofmann, G
    Deputy director and main group leader, SIEMENS AG KWU/E11, Erlangen,

    Pages: 15    Published: Jan 1992


    Abstract

    The reconstitution of Charpy specimens by electron-beam welding was approved by German authorities about 20 years ago. The minimum insert size, based on tests in the upper shelf region, is 12 mm. More than 2000 specimens have been tested and evaluated successfully.

    In connection with surveillance programs for several early reactor pressure vessels, it became desirable to obtain results from transverse Charpy specimens. Longitudinal specimen halves can be reconstituted into transverse specimens only when 10 by 10 by 10-mm inserts are qualified. Therefore, qualification tests have been carried out with 11 and 10-mm inserts machined out of broken Charpy specimens. The results show, with some restrictions in the upper shelf region, that the same index temperatures are measured. Hardness and temperature measurements support these results.

    In the same context, preliminary tests with stud-welded subsize compound specimens have been done. It was shown with 3 by 4 by 8-mm inserts within specimens of 2 by 4 by 27 mm that reasonable results can be determined. These results are also supported by hardness and temperature measurements.

    Keywords:

    compound specimen, impact test, Charpy specimen, subsize specimen, surveillance program, electron beam welding, stud welding


    Paper ID: STP17863S

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP17863S


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