Standard ASTM B164 / ASME SB164 Dimensions ASTM, ASME and API Round Bars Size 10 mm To 100 mm Dia in 100 mm TO 6000 mm Length. Round bar Diameter 3-~800mm Hex Bar size 2-100mm A/F Square bar size 4 to 100mm Flat bar Thickness 2 -100mm Flat bar Width 10 to 500mm Length 3 to 6 meter, Custom Cut Lengths Form Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wiremesh, Billet, Ingot, Forging Etc.,