① If used for welding rod and build up welding parts, Be content should not exceed 0.0008%.
② Berilium should be added according to the standards, the analysis is not needed.
③ If arranged in the maker and the customer agreement, Ti+Zr content in die casting parts and
forgings should not exceed 0.20%.
④ Content of Zn in 3A21 alloy for rivet material should not exceed 0.03%.
⑤ If arranged in the maker and the customer agreement, Ti+Zr content in die casting parts and
forgings should not exceed 0.25%.
