ANSI Standards AA ANSI H35.4-2017 pdf free download – Designation system for unalloyed aluminum 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... 02-18 Download Now