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HAYNES® Alloys

Dimensional Tolerances

Commercial OD/Wall (ASTM B-338)

Nominal Outside Diameter Diameter Tolerance Ovality Tolerance Wall Tolerance
in mm in mm - -
Under 1. 25.4 excl. +/-0.004 0.102 - -
1 to 1.5 25.4 to 38.1 excl. +/-0.005 0.127 Tolerance* +/- 10%
1.5 to 2 38.1 to 50.8 excl. +/-0.006 0.152 Included in Nominal
2 to 2.5 50.8 to 63.5 excl. +/-0.007 0.178 Diameter Wall Thickness
2.5 to 3.5 63.5 to 88.9 excl. +/-0.010 0.254 Tolerances -

Aerospace OD/Wall (AMS)

Nominal Outside Diameter, in. Diameter Tolerance, in. Ovality Tolerance Wall Tolerance
Over 0.093 to 0.188, incl. +0.002/-0.000 Tolerance + 10%, - 5% Nominal Wall Thickness For
Over 0.188 to 0.500, incl. +0.003/-0.000 Included in Tubing under 1.500 in. (38.1 mm) Nominal OD
Over 0.500 to 1.000, incl. +0.004/-0.000 Diameter  
Over 1.000 to 1.500, incl. +0.004/-0.001 Tolerances +/- 10% Nominal Wall Thickness for
Over 1.500 to 2.000, incl. +0.005/-0.001 - Tubing over 1.500 in (38.1 mm) Nominal OD
Diameter, mm Tolerance, mm - -
Over 2.3 to 4.70, incl. +0.05/-0.00 - -
Over 4.7 to 12.50, incl. +0.08/-0.00 - -
Over 12.5 to 25.00, incl. +0.10/-0.00 - -
Over 25.0 to 37.50, incl. +0.10/-0.02 - -
Over 37.5 to 50.0, incl. +0.12/-0.02 - -

Aerospace OD/ID (AMS/DAN)

Nominal Outside Diameter, in. Diameter Tolerance, in. Ovality Tolerance Wall Tolerance
Over 0.093 to 0.187, incl. +0.002/-0.000 Tolerance All Tubing 1.500 in.
Over 0.187 to 0.499, incl. +0.003/-0.000 Included in (38.1 mm) And Under in
Over 0.499 to 0.749, incl. +0.004/-0.000 Diameter Nominal O.D. Shall Have a
Over 0.749 to 0.999, incl. +0.004/-0.001 Tolerances Wall Thickness Not Less
Over 0.999 to 1.499, incl. +0.004/-0.002 - Than 95% of Nominal
Over 1.499 to 1.999, incl. +0.005/-0.002 - -
Diameter, mm Tolerance, mm -
Over 2.36 to 4.75, incl. +0.05/-0.00
Over 4.75 to 12.67, incl. +0.08/-0.00
Over 12.67 to 19.02, incl. +0.10/-0.00
Over 19.02 to 25.37, incl. +0.10/-0.025
Over 25.37 to 38.07, incl. +0.10/-0.05
Over 38.07 to 50.77, incl. +0.13/-0.05
Nominal Inside Diameter, in. Diameter Tolerance, in. -
Up to 0.338, incl. +0.0015/-0.0015
Over 0.338 to 0.499, incl. +0.002/-0.002
Over 0.499 to 0.637, incl. +0.0025/-0.0025
Over 0.637 to 0.900, incl. +0.003/-0.003
Over 0.900 and over +0.004/-0.004
Diameter, mm Tolerance, mm -
Up to 8.59, incl. +0.038/-0.038
Over 8.59 to 11.40, incl. +0.05/-0.05
Over 11.40 to 17.09, incl. +0.064/-0.064
Over 17.09 to 22.86, incl. +0.08/-0.08
Over 22.86 and above +0.10/-0.10

Inside diameter is equal to the nominal OD minus twice the nominal wall

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