Robuta

https://store.astm.org/b0283-08.html B283 Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed) standard specification for copper https://store.astm.org/b0283_b0283m-12.html B283/B283M Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed) standard specification for copper