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Carbon and Alloy Steel Hot Rolled Bars 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 ¼ incl.
Over 1 ¼ 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.