Note A: For small diameter or thin wall tubing or both, where many drawing
passes are required, a maximum of 0.040 % carbon is necessary in
grades MT-304L and MT-316L. Small outside diameter tubes are defined
as those under a 0.500 in. [12.7 mm] outside diameter and light-wall
tubes as those under a 0.049 in. [1.2 mm] average wall thickness
(0.044 in. [1.1 mm] min wall thickness).