Domestic materials are defined by where the final smelting is accomplished, this location is listed in our Mill Test Report (MTR). DFARS is short for "Defense Federal Acquisition Regulation Supplement." 6061 is a structural alloy and stronger, harder and more machinable than 5052. 5052 is an architectural alloy and is more ductile/formable than 6061.
We offer these made in American aluminum sheet alloys in DFARS/Domestic:6061-T6/T651 | 5052-H32