1 ctr of the following turnings -
The assay department removed large pieces and the 3.6% of free Fe.
Chemical Composition: Zn – 33.7%, Cu – 2.5%, Si – 1.5%, Pb – 8.3%, Al – 52.8%, Fe – 0.1% (with the free Fe removed).
Large pieces are 380, and some other pieces are wrought 3xxx and 5xxx series.