Alloys

HOT ROLLED ALLOY BARS
SIZE TOLERANCES
AND OUT-OF-ROUND OR
OUT-OF SQUARE TOLERANCES
Hot Rolled Alloy Bars Round, Square, and Round-Cornered Square
Size Tolerances (inches) Out-of-Round or
Out-of-Square
Specified Sizes (inches) Over Under Section (inches)
Up thru 5/16 0.005 0.005 0.008
Over 5/16 thru 7/16 0.006 0.006 0.009
Over 7/16 thru 5/8 0.007 0.007 0.010
Over 5/8 thru 7/8 0.008 0.008 0.012
Over 7/8 thru 1 0.009 0.009 0.013
Over 1 thru 1-1/8 0.010 0.010 0.015
Over 1-1/8 thru 1-1/4 0.011 0.011 0.016
Over 1-1/4 thru 1-3/8 0.012 0.012 0.018
Over 1-3/8 thru 1-1/2 0.014 0.014 0.021
Over 1-1/2 thru 2 1/64 1/64 0.023
Over 2 thru 2-1/2 1/32 0 0.023
Over 2-1/2 thru 3-1/2 3/64 0 0.035
Over 3-1/2 thru 4-1/2 1/16 0 0.046
Over 4-1/2 thru 5-1/2 5/64 0 0.058
Over 5-1/2 thru 6-1/2 1/8 0 0.070
Over 6-1/2 thru 8-1/4 5/32 0 0.085
Over 8-1/4 thru 9-1/2 3/16 0 0.100
Over 9-1/2 1/4 0 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.
SIZE TOLERANCES - ROUNDS
Turned & Ground/Turned, Ground & Polished
Diameter Not Heat Treated Heat Treated
Range (inches) All Carbons All Carbons
Up thru 1-1/2 +0 - 0.001 +0 - 0.001
Over 1-1/2 thru 2-1/2 +0 - 0.0015 +0 - 0.0015
Over 2-1/2 thru 3 +0 - 0.002 +0 - 0.002
Over 3 thru 4 +0 - 0.003 +0 - 0.003
Over 4 thru 6 +0 - 0.004 +0 - 0.005
Over 6 +0 - 0.005 +0 - 0.006
DCF THICKNESS & WIDTH OVERSIZE RANGES
Thickness 1/2" thru 3-3/4"............... +0.015 to +0.090 on width
Thickness over 4"............................ +0.062 to +0.125 on width
Thickness........................................ +0.015 to +0.035 oversize thru 4"
........................................................ +0.060 to +0.156 over 4"
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