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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Other types are subject to special inquiry. Tolerances for thicknessesof 0.

One of anei first jobs undertaken by this committee was the compilation of mechanical property data for commonly used aluminum alloys and dimensional tolerances for other aluminum mill products.

The remainder is the twist. In no case is the tolerance for either width or depth less than the metal dimensions Col.

ANSI H | The Aluminum Association

H x Measured length, ft. From this measurement, the actual deviation from straightness of the drawn tube at anai point is subtracted. I20,,-Applies only in a lengths 20 ft. Anssi the case of Class 1 Hollow Profiles the standard wall thickness tolerance for extruded round tube is applicable. 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.

ANSI H35.2

Successive editions of the “Standards for Aluminum Aansi Products” have been revised to include new data and to keep the manual abreast of industry advances. Allowable deviation from nominal angle: Maximum height is controlled by weight tolerance.

Included also are definitions of the various products as given in “AluminumStandards and Data” published by The Aluminum Association, and standard limits for expressing the tolerances. Requests for interpretation should be addressedto the secretariator sponsorwhose name appears on the title page of this standard. Standard tolerances for foroina stock in sheet and olate form are as indicated in the section on Sheet and Plate.


Capable of being lapped at either end and ribs are parallel to eaai other and to edges of sheet within f V 8 in. Measured exclusive of edge bulges typically present on compression cold work forgings.

The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of approval. Foil-A rolled product rectangular in cross section of thickness less than 0.

Work on the tolerances began in The Aluminum Association infive years before its Technical Committee was established. O04,A Class 1 Hollow Profile is one whose void is round and one inch or more in diameter and whose weight is equally distributed on opposite sides of two or more equab spaced axes. Profile-A wrought product that is long in relation to its cross-sectional dimensions which is of a form other than that of sheet, plate, rod, bar, tube, wire or foil.

This work was completed later inand j35.2 resulting data were published in the first edition of the Association’s “Standards for Aluminum Mill Products” in June They are the basis of the dimensional tolerances specified in U. Alclad Sheet-Composite sheet comprised of an aluminum alloy core having on both surfaces if on one side only, Alclad One Side Sheet znsi metallurgically bonded aluminumor aluminum alloy coatingthat is anodic to the core, thus electrolyticallyprotecting the asi against corrosion.

Tolerances apply to 5xxx alloys with O98,Most tubes in alloy will have die lines about twice the depth shown in the table; however, for each tube size the supplier should be contacted for the roughness value to apply. Welded Tube-A tube produced by forming and seamwelding sheet longitudinally.


In addition, tolerances have been developed for products not covered initially, h5.2 the data have been extended to embrace the larger sizes now being produced. When a dimension tolerance is specified other than nasi equal bilateral tolerance, the value of the standard tolerance is that which applies to the mean of the maximum and minimum dimension permissible under the tolerance for the dimension under consideration. Specified bar thickness 0.

For the depth Dthe tolerance is the value shown in Col. The term “Profile” is preferred.

Example-Alloy hollow profile having 1 x 3 rectangularoutside dimensions;width tolerance is Io. O74 For some items of relatively thin wide bar greater thickness tolerances are required as follows: Not applicable to alloy exbusions.

hh35.2 Not applicable to Allowable deviation from specified contour: Not applicable to annealed O temper tube. Fin Stock-Coiled sheet or foil in specific alloys, tempers, and thickness ranges suitable for manufacture of fins for heat-exchanger applications.

Tolerancesapply to 5xxx alloys with Copyright The Aluminum Association Inc. O90,By ,the Aansi technical activitieshad grown to the point that a standingTechnical Committeewas needed. Where instruments permitting the required degree of accuracy generally are used, the tolerances are expressed in decimals as follows except for foil: O01 1 1.

Covering area in sq. Section Intentionally Blank 5. Locate proper tolerance in column 4, 5,6,7,8 or 9 in the same line as value chosen in column 1.