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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ANSI H35.2

Work on the tolerances began in The Aluminum Association infive years before its Technical Committee was established.

The mean wall thickness of round tube is the average of two measurements taken opposite each other.

Tolerancefor “O” temper material is four times the standard tolerances shown. O98h35.22, Over 12 thru 30 0 Structural Profile-A profile rolled or extruded, in certain standard alloys, tempers, sizes, and sections, such as angles, channels, tees, zees, I-beams, and H-sections, commonly used for structural purposes. They represent the maximum deviation from specified dimensions that may be expected in any individual piece.

The Amencan National Standards Institute ansii not develop standards and will under no circumstances give an interpretation of any American Standard. Standards Committee H35 was transferred to an Accredited Standards Committee on December 28,and this revision was developed under the Accredited Standards Committee method.


O74 For some items of relatively thin wide bar greater thickness tolerances are required as follows: Up thru 1 Over 1 In any 1 in. O30 ansl tube is the average of two measurementstaken opposite each other at approximate center line of tube and perpendicular to the longitudinal axis of the cross section.

ANSI H | The Aluminum Association

Differencebetween radius A and specified radius Sharp corners 0. Forging Stock-A wrought or cast rod, anssi or other section suitable for forging. Tolerances for thicknessesof 0. O00 Comer radii may vary from O to 0. O98,Other types are subject to special inquiry.

Locate dimension ‘ X in column 1 2.

Moreover, no person shall have the right or authorityto issue an interpretation of an American National Standard in the name of the American National Standards Institute. Cup test values, when used, are acceptable only as general guidelines for rating comparative formability.

Tolerances for extruded profiles in T, T, T, T, O and TE51O tempers shall be as agreed upon between purchaser and vendor at the time the contract or order is entered. When dimensions specified are outside and inside, rather than wall thickness itself, allowable deviation at any point eccentricity is plus and minus 10 percent of the mean wall thickness but not less than Alclad Sheet-Composite sheet comprised of an aluminum alloy anssi having on both surfaces if on one side only, Alclad One Side Sheet a metallurgically bonded aluminumor aluminum alloy coatingthat is anodic to the core, thus electrolyticallyprotecting the core against corrosion.


T, T, T, T, and l K x Measured length, it. L a Y Tolerances aDplicable to dimensions ‘X” are determined asfoiiows: Asni following values are used to convert angular tolerances to linear deviation: From this measurement, the actual deviation from straightness of the extruded section at that point is subtracted. 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.

Rod-A solid wrought g35.2 that is long in relation to its circular cross section, which is not less than 0. Tolerances applicable at ambient mill temperatures. Distances ‘C” are shown merely to indicate incorrect values for determining which of columns ‘B’ Tolerances applicable to dimensions ‘ X are determined as follows: Ansii Measured length, ft.

Mean diameter is the average of two diameter measurements taken at right angles to each other at the same longitudinal location on the tube.