There’s two new ASTM revisions for zinc specifications, ASTM B6 and ASTM B240. The two standards are ASTM B6-13, “Standard Specification for Zinc,” and ASTM B240-13, “Standard Specification for Zinc and Zinc-Aluminum (Za) Alloys in Ingot Form for Foundry and Die Castings.”
ASTM B6 covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: LME grade, special high grade, high grade, intermediate grade, and prime western grade. The zinc metal is tested and conforms to the chemical composition requirements of lead, iron, cadmium, aluminum, copper, tin, and non-zinc metals.
The B6 2013 Edition replaces the 2012 release, which is now obsolete. For the new edition, UNS numbers were added.
ASTM B240 covers commercial zinc and zinc-aluminum alloys in ingot form for remelting for the manufacture of pressure die castings, foundry castings and continuous cast bar stock. Seven alloy compositions are specified, which includes Z33521, Z33522, Z35530, Z35540, for zinc alloys and Z35635, Z35630, Z35840, for zinc-aluminum alloys. The material is expected to be of uniform quality and reasonably free from dross, adhering foreign matter, and surface oxide.
The 4-page B240 2013 Edition replaces the 2010 release, which is also now obsolete. And again, the UNS numbers were added.
Both ASTM B6 and ASTM B240 were released 3/15/2013 and can be purchased at Document Center’s webstore, www.document-center.com. Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com). In additional to providing you with a premium resource for purchasing your conformance information, we’re here to assist you with all your questions about standards.
