Bar Tolerances for Hot Rolled Alloy Bars

Below is a chart for reference on hot rolled bar tolerances.

Specified Sizes (Rounds or Squares) Over Under Out-of-Round or Square Machining Allowance - Minimum Stock Removal*
To 5/16" included 0.005" 0.005" 0.008"

0.016"

Over 5/16" to 7/16" included 0.006" 0.006" 0.009" 0.016"
Over 7/16 to 5/8" included 0.007" 0.007" 0.010" 0.016"
Over 5/8" to 7/8" included 0.008" 0.008" 0.012" 0.021"
Over 7/8" to 1" included 0.009" 0.009" 0.013" 0.023"
Over 1" to 1-1/8" included 0.010" 0.010" 0.015" 0.025"
Over 1-1/8" to 1-1/4" included 0.011" 0.011" 0.016" 0.028"
Over 1-1/4" to 1-3/8" included 0.012" 0.012" 0.018" 0.030"
Over 1-3/8" to 1-1/2" included 0.014" 0.014" 0.021" 0.033"
Over 1-1/2" to 2" included 1/64" 1/64" 0.023" 0.042"
Over 2" to 2-1/2" included 1/32" 0" 0.023" 0.052"
Over 2-1/2" to 3-1/2" included 3/64" 0" 0.035" 0.072"
Over 3-1/2" to 4-1/2" included 1/16" 0" 0.046" 0.090"
Over 4-1/2" to 5-1/2" included 5/64" 0" 0.058" 0.110"
Over 5-1/2" to 6-1/2" included 1/8" 0" 0.070" 0.125"
Over 6-1/2" to 8-1/4" included 5/32" 0" 0.085" 0.155"
Over 8-1/4" to 9-1/2" included 3/16" 0" 0.100" 0.203"
Over 9-1/2" to 10" included 1/4" 0" 0.120" 0.250"

*Double the amount shown for proper stock removal on diameter or cross section.