FIELD: test of sheet refractory annealed metal to determine its suitability for forming. SUBSTANCE: samples in the form of rectangular plates are subjected to cantilever bending to one side. Bending angle is set equal to 90 deg. Sample which breakage forms lateral crack are considered brittle. Samples unbroken after single bending are cyclically deformed up to breakage with provision of unbending of sample to initial position in each cycle. Percentage of samples with brittle breakage to all tested samples formed from sheet is measure of brittleness of sheet. EFFECT: reliable quantitative evaluation of brittleness of sheets. 2 dwg, 1 tbl
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