RoHS -- is the chromium in 6061 / 5052 aluminum hexavalent?
Q. For the purposes of the New EU Directives and RoHS compliance, a maximum concentration value of up to 0.1% by weight in homogenous materials for hexavalent chromium will be permitted in the manufacture of new EEE.
Is the Chromium (Cr) found in 6061-T651, 5052-H34 or other common Al alloys hexavalent form? (please refer to http://www.aerospacemetals.com/aluminum-distributor.html for aluminum specs)Costa Christopoulos
RoHS & WEEE - Montreal, Quebec, Canada
A. No, the Cr is not present in the hexavalent ion form when it is alloyed with Al, steel, etc.Toby Padfield
Automotive module supplier - Michigan
July 3, 2014 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread
Q. Currently we are specifying MIL-A-8625 Type II for an anodize finish on 5052-H32 and 6061-T6 aluminum components in order to meet RoHS compliant requirement. A question comes up that whether 5052 or 6061 themselves are RoHS compliant because of the amount of chromium in the base alloy material. I understand that there are 3 types of chromiums - zero valent, trivalent and hexavalent. Can anyone tell me what type of chromium is inside 5052 and 6061 alloys and if they are RoHS compliant? Thank you very much.Jacky Yam
- Hazelwood, Missouri, USA
If you have a question in mind which seems off topic, please Search the Site