ANSI H American National Standard Dimensional Tolerances for Aluminum Mill Products. This Standard is a revision of ANSI H(M), which consists of logical values for long-term metric use rather than a restatement of ANSI. ANSI H American National Standard Dimensional Tolerances for Aluminum Mill Products, standard by American National Standards Institute .

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O1O x Measured length, it. Not applicable to O temper tube. O04 x W inches.

When a dimension tolerance is specified other than as equal bilateral tolerance, the value of the standard tolerance is that which applies to the mean of the maximum and minimum dimension permissible under ansj tolerance for the dimension under consideration. I70,amsi,, – -Tolerance, degrees Maximum allowable linear deviation inch per inch of width 0. H x Measured length, ft. For the depth Dthe tolerance is the value shown in Col.

O90,Based on nominaldimensions, plain ends, and a density of 0. Ve in any 1O ft.

ANSI H | The Aluminum Association

In case of dispute, allowed plus tolerance shall be determined by weight. Wire-A solid wrought product that is long in relation to its cross section, which is square or rectangular with sharp or rounded comers or edges, or is round, hexagonal, or octagonal, and whose diameter or greatest perpendicular distance between parallel faces is less than 0. I20,,-Not applicable to alloy exbusions. Twist is normally measured by placing the welded tube on a flat surface and at any point along its length measuringthe maximum distance between the bottom surface of the welded tube and the flat surface.


L a Y Tolerances aDplicable to dimensions ‘X” are determined asfoiiows: Mean diameter is the average of two diameter measurements taken at right angles to each other at the same longitudinal location on the tube. Not applicable to the weld area or to embossed tube.

Maximum wall thickness is controlled by weight tolerance. O81 Up thru 0. Profile-A wrought product that is long anxi relation to its cross-sectional dimensions which is of a form other than that of sheet, plate, rod, bar, tube, wire or foil. Foil-A rolled product rectangular in cross section of thickness less than 0.

ANSI H35.2

When the area between the surface fotming an angle is ail metal, vaiues in column snsi apply if the larger surface length to metal thickness ratio is 1 or less. Allowable deviation from nominal angle: Mean diameter is the average of two diameter measurements taken at right angle to each other at any point along the length.


Specified bar thickness less than 0. Tolerancesapply to 5xxx alloys with Tolerance less than 0.

Work on the tolerances began in The Aluminum Association infive years before its Technical Committee was established. For tube over asni Cup test values, when used, are acceptable only as general guidelines for rating comparative formability. For most pieces the deviation from specified dimensions will be less than the tolerance shown.

Tube and Pipe – Tables When both outside and inside diameters or inside diameter and wall thickness are specified, the tolerance applicable to the specified or calculated O.

Tolerances applicable to dimensions “X” are not determined nasi Table Otherwise use the tolerance shown for 0. Standards Committee H35 was transferred to an Accredited Standards Committee on December 28,and this revision was developed under the Accredited Standards Committee method. In that year a special committee was appointed by the Association’s Extruded Products Division to develop drafting standardsfor these products.

Distances ‘C” are shown merely to indicate incorrect values for determining which of columns ‘B’ Tolerances applicable to dimensions ‘ X are determined as follows: