AA ANSI H35.4-2017 pdf free download – Designation system for unalloyed aluminum.
1 .1 This standard provides a system for designating unalloyed aluminum not made by a refning process and used primarily for remelting.
1.2 Unalloyed wrought aluminum designations (1 0xx series with specified minimum aluminum and limits for natural impurities), are assigned and registered in accordance with ANSI H35.1 .
2. Unalloyed Aluminum Designation System 1
2.1 This system consists of four digit numerical designations prefxed by the letter P (Purity) and sufxed by a serial letter. The frst two numerical digits, XX, indicate the two digits to the right of the decimal place in the limit for maximum 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 identifed by the letter A following the numerical designation, i.e., PXXYYA.
2.1 .2 Variations of a basic 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 identifed by substituting a serial letter in place of the letter A. The serial letters are assigned in alphabetical sequence starting with B but omitting I, O, and Q.
2.2 Maximum limits for the following, expressed as a mulitple of 0.01 percent are registered for each designation: Silicon; Iron; Other; Elements, Each; Other Elements, Total. Aluminum is specified as a remainder for unalloyed aluminum 2 . Maximum limits for individual elements other than silicon and iron may be registered 3 .AA ANSI H35.4 pdf download.