Tolerances per ASTM-A484

Specified Size Over Under Out-of-Round/Square
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 0.023
Over 2-1/2 to 3-1/2 incl. 3/64 0 0.035
Over 3-1/2 to 4-1/2 incl. 1/16 0 0.046

 

 

 

 
Over 4-1/2 to 5-1/2 incl. 5/64 0 0.058
Over 5-1/2 to 6-1/2 incl. 1/8 0 0.070
Over 6-1/2 to 8 incl. 5/32 0 0.085

Cold Finished Rounds

Specified Size Over Under
1/8 to 5/16 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 incl. 0.003 0.003
4-1/8 to 4-1/2 incl. 0.005 0.005
4-9/16 to 6 incl. 0.008 0.008


Straightness Tolerances

Hot Finished: 1/8 inch in any 5 feet, but may not exceed 1/8 x (no. of feet in length)/5
Cold Finished: 1/16 inch in any 5 feet, but may not exceed 1/16 x (no. of feet in length)/5
Custom tolerances unique to your application upon request

Custom Stainless Steel Flat Bar tolerances unique to your application are available upon request

Hastelloy is a trademark of Haynes International Super Duplex 2507 is a trademark of Sandvik Steel Monel is a trademark of Special Metals, and is sold only through authorized distributors