Permissible Variations in Cross Section for Hot-Wrought Round,

Square, and Round-Cornered Square Bars of Carbon and Alloy Steel

 

Specified Size, In Permissible Variation from specified Size, In Out-of-Round or Out-of-Square In
Over
Under
To 5/16", incl
0.005
0.005
0.008
Over 5/16" to 7/16", incl.
0.006
0.006
0.009
Over 7/16" to 5/8", incl.
0.007
0.007
0.010
Over 5/8" to 7/8", incl.
0.008
0.008
0.012
Over 7/8" to 1", incl.
0.009
0.009
0.013
Over 1" to 1-1/8", incl.
0.010
0.010
0.015
Over 1-1/8" to 1-1/4", incl.
0.011
0.011
0.016
Over 1-1/4" to 1-3/8", incl.
0.012
0.012
0.018
Over 1-3/8" to 1-1/2", incl.
0.014
0.014
0.021
Over 1-1/2" to 2", incl.
1/64"
1/64"
0.023
Over 2" to 2-1/2", incl.
1/32"
0.000
0.023
Over 2-1/2" to 3-1/2", incl.
3/64"
0.000
0.035
Over 3-1/2" to 4-1/2", incl.
1/16"
0.000
0.046
Over 4-1/2" to 5-1/2", incl.
5/64"
0.000
0.058
Over 5-1/2" to 6-1/2", incl.
1/8"
0.000
0.070
Over 6-1/2" to 8-1/4", incl.
5/32"
0.000
0.085
Over 8-1/4" to 9-1/2", incl.
3/16"
0.000
0.010
Over 9-1/2" to 10", incl.
1/4"
0.000
0.120

 

a. 1" inc. = 25.4 mm

 

b. Out-of-Round is the difference between the maximum and minimum diameters of the bat, measured at the same cross section. Out-of-square is the difference in the tow dimensions at the same cross section of a square bar between opposite faces.

 

Straightness Tolerances - All Bars

As Rolled
Special Straightness

1/4 inch in any 5 feet

(6.4 mm in any 1-1/2-meter length)

1/8 inch in any 5 feet

(3.2 mm in any 1-1/2-meter length)

Because or warpage, straightness tolerances do not apply to bars if any subsequent heating operation or controlled cooling has been performed.

 

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