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The stress required to stretch a test piece to a given elongation (typically 100%, 200%, or 300%).
The primary goal of a JIS K 6251 test is to quantify how a rubber material behaves under tension. The test yields several critical mechanical properties: Tensile Strength ( TScap T sub cap S
Place the specimen in the grips, start the machine at a standard speed (usually 500 ± 50 mm/min), and run until failure.
Cut the rubber into the specified dumbbell shape using a die cutter.