Carbon and Alloy Steel Hot Rolled Bar
Rounds, Squares, and Round Cornered Squares

Size Tolerances and Out-of-Round or
Out-of-Square Tolerances

	Size Tolerance, in.
Specified Sizes, In.	Over Under	Out-of-Round or Out-of-Square, In.
To 5/16 incl. Over 5/16 to 7/16 incl. Over 7/16 to 5/8 incl. Over 5/8 to 7/8 incl.	.005 .005 .006 .006 .007 .007 .008 .008	.008 .009 .010 .012
Over 7/8 to 1 incl. Over 1 to 11/8 incl. Over 11/8 to 1¼ incl. Over 1¼ to 13/8 incl.	.009 .009 .010 .010 .011 .011 .012 .012	.013 .015 .016 .018
Over 13/8 to 1½ incl. Over 1½ to 2 incl. Over 2 to 2½ incl. Over 2½ to 3½ incl.	.014 .014 1/64 - 1/64 1/32 - 0 3/64 - 0	.021 .023 .023 .035
Over 3½ to 41/2 incl. Over 4½ to 51/2 incl. Over 5½ to 6½ incl. Over 6½ to 81/4 incl.	1/16 - 0 5/64 - 0 1/8 - 0 5/32 - 0	.046 .058 .070 .085
Over 81/4 to 91/2 incl.	3/16 - 0	.100
Over 9½ to 10 incl.	1/4 - 0	.120

Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same transverse cross section.

Out-of -square section is the difference in perpendicular distance between opposite faces, measured at the same transverse cross section.

Tolerances shown are based upon ASTM A29.Reference:AISI Steel Products Manual, Alloy, Carbon and HSLA Steels. March, 1986.