As a follow-up to yesterday’s blog on the new ANSI H35.1 2013 Edition, today we’ll cover the companion ANSI H35.2 and ANSI H35.2(M) updates. The ANSI H35.2, “American National Standard Dimensional Tolerances for Aluminum Mill Products,” covers measurements using the inch-pound systems. The ANSI H35.2(M), “American National Standard Dimensional Tolerances for Aluminum Mill Products (Metric),” provides the same information in metric format. Both have been updated with the recent release of the 2013 Editions.
Coverage is intended primarily for the U.S. The documents provide users with the needed formulas for allowed standard tolerances in extruded and milled aluminum products. This will be the plus-or-minus degree of accuracy needed in engineering drawings and contract fulfillment for various aluminum parts. They’ll cover cross section/wall thickness, length, straightness, twist, and other aspects of physical dimensions.
Again, this new 2013 update for both editions of the standard replace the previous 2009 Editions of each. Since it is essential that you use the latest edition of the standard in defining and producing products, you’ll want to be aware that changes have been made to the two documents.
There has been modification of the column headings for extruded and drawn pipe in order to harmonize with ANSI/ASME standards. There are clarifications to the tolerance table for drawn tube as well. And you’ll find clarification on tolerance calculation for wall thickness (eccentricity) of extruded tube in the new editions.
FYI: The Aluminum Association has also reviewed and updated the balance of the H35 series as well. Here’s the status of the remaining 3 standards:
- ANSI H35.3, 2006 Edition Reaffirmed in 2013, Designation System for Aluminum Hardeners
- ANSI H35.4, 2006 Edition Reaffirmed in 2013, Designation System for Unalloyed Aluminum
- ANSI H35.5, 2013 Edition, American National Standards Nomenclature System for Aluminum Metal Matrix Composites
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