STANDARD PERMISSIBLE TOLERANCE
VARIATIONS OF STAINLESS STEEL BARS

Size Tolerances – Cold Finished Rounds
Drawn, Ground or Ground and Polished
ASTM A276/A484
Specified Sizes
Inches
Over
Under
.044 to 1/16” excl
0.001
0.001
5/16” to 1/2” excl
0.0015
0.0015
1/2 to 1” excl
0.002
0.002
1” to 1-1/2” excl
0.0025
0.0025
1-1/2” to 4” excl
0.003
0.003
4-1/8” t o4-1/2” excl
0.005
0.005
4-9/16” to 6” excl
0.008
0.008
Processsed Flats
Thickness Tolerances
Cut From Plat (Shearing)
ASTM A240
Specified Thickness *
Inches
Permissible Variations
Over
Under
1/8”
0.010
0.010
3/16”, 1/4”, 5/16”
0.050
0.010
3/8”, 1/2”
0.060
0.010
*Thickness is meausred along the longitudinal edges of the plate or plate coils at least 3/8″, but not more than 3″ from the edge before the bar is cut or slit.
Processed Flats
Width Tolerances
Cut From Plat (Shearing)
ASTM A240
Specified Thickness *
Inches
Permissible Variations
Over
Under
1/8” to 3/8” incl.
0.063
0.063
Over 3/8” to 1/2” incl.
0.125
0
Processed Flats
Straightness Tolerances
ASTM A240

(Identical with Table #11 of ASTM A484) Measurement is taken on the concave side of the bar with a straight edge. Unless otherwise specified, bars are furnished machine straightened to the following tolerances:

HOT FINISHED
1/8 inch in any 5 feet, but may not exced 1/8 x (no. of feet of length divided by 5) inches
HOT FINISHED ANGLES

NOTE: For unequal leg angles, the longer leg determines the tolerance for the length of each leg.

Weight:
For angles of 6 lb/ft or less, the weight tolerances shall not exceed +/- 7-1/2%. For angles over 6 lb./ft, the weight tolerances shall not exceed +/- 4-1/2%

Length of Legs:
For angles having legs or flanges up to 6″ incl., the length tolerance shall not exceed +/- 1/8″. For angles having legs or flanges over 6″, the length tolerance shall not exceed
+3/16″ / and -1/8″.

Squareness of Legs:
The tolerance for the right angle between the legs is +/- 2 degrees.