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JD Squared, Inc. is an American manufacturer of tube and pipe benders. Founded in 1982 and based in Johnson City, Tennessee, the company has manufactured fabrication tools since 1982, starting with tube and pipe benders and later expanding to other fabrication tools. JD Squared is a privately owned Florida corporation. Robert Hughes is the ...
The type of notch introduced to a specimen depends on the material and characterization employed. For standardized testing of fracture toughness by the Charpy impact method, specimen and notch dimensions are most often taken from American standard ASTM E23, or British standard BS EN ISO 148-1:2009.
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Notching is a metal-cutting process used on sheet-metal or thin bar-stock, sometimes on angle sections or tube. A shearing or punching process is used in a press, so as to cut vertically down and perpendicular to the surface, working from the edge of a work-piece.