Crude copper:
Non ferrous metal industry standard of the people's Republic of China YS / T 70-93
① The main component is copper plus silver, not less than 96%, up to 99.3%;
② The main impurity elements are arsenic, antimony, bismuth and lead;
③ For refining;
④ It is in ingot shape, 30 ~ 50kg per ingot.
Other copper ingots can be available from 15 to 300 kg according to customer requirements.