1、1. Scope1.1 This standard provides a system for designating unalloyed aluminum not made by a re ning process and used primarily for remelting.1.2 Unalloyed wrought aluminum designations (10xx series with speci ed minimum aluminum and limits for natural impurities), are assigned and registered in acc
2、ordance with ANSI H35.1. 2. Unalloyed Aluminum Designation System Q2.1 This system consists of four digit numerical designations pre xed by the letter P and suf xed by a serial letter. The rst two numerical digits, XX, indicate the two digits to the right of the decimal place in the limit for maximu
3、m silicon, 0.XX. The last two numerical digits, YY , indicate the two digits to the right of the decimal place in the limit for maximum iron, 0.YY .2.1.1 Each basic unalloyed aluminum designation is identi ed by the letter A following the numerical designation, i.e., PXXYYA.2.1.2 Variations of a bas
4、ic unalloyed aluminum, i.e., having the same individual silicon and iron limits but having different individual limits for elements other than silicon and iron are identi ed by substituting a serial letter in place of the letter A. The serial letters are assigned in alphabetical sequence starting wi
5、th B but omitting I, O, and Q.2.2 Maximum limits for the following, expressed as a multiple of 0.01 percent are registered for each designation: Silicon; Iron; Other Elements, Each W ; Other Elements, Total W ; Aluminum, remainder E . Maximum limits for individual elements other than silicon and iro
6、n may be registered R . ANSI H35.4-2006 (R2013) Reaf rmation of H35.4-2006designation system for unalloyed aluminum American National Standard Approved November 7, 2013 Secretariat: The Aluminum Association, Inc. QChemical composition limits and designations conforming to this standard may be regist
7、ered with the Aluminum Association provided (a) the unalloyed aluminum is offered for sale currently and shall have been sold within the 12 months immediately preceding the date of registration request, in both cases in commercial quantities, (b) the complete chemical composition limits are register
8、ed, (c) the composition is different from that of any other unalloyed aluminum for which a numerical designation already has been assigned. WExcluding aluminum and other element(s), singly or in combination, that have a speci ed limit. EThe aluminum content for unalloyed aluminum not made by a re ni
9、ng process is the difference between 100.00 percent and the sum of all the other analyzed metallic elements including silicon present in the amounts of 0.010 percent or more each expressed to the second decimal before determining the sum. When an elements speci ed maximum limit is 0.XX, an observed
10、value or a calculated value greater than 0.005 but less than 0.010% is rounded off and shown as “less than 0.01.” RStandard limits for impurities are arranged in the following sequence: Silicon; Iron; Zinc; Gallium; Vanadium; Additional speci ed elements in alphabetical order of their chemical symbo
11、ls; Other Elements, Each; Other Elements, Total; Aluminum, remainder. An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public.
12、The existence of an American National Standard does not in any respect preclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Standards are subject to perio
13、dic review and users are cautioned to obtained the latest editions. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpreta
14、tion of an American National Standard in the name of the American National Standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaf rm, revise, or withdraw this standard no later than ve years from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute.
