재질 화 학 성 분 (%) 용접성 내식성 절삭성 표면처리 Cu Si Mg Zn Mn Cr Fe Ti Ni Al 1070 0.04" 0.02" 0.03" 0.04" 0.03" D 0.25" 0.03" D 99.7 A A D A 1050 0.05" 0.25" 0.05" 0.05" 0.05" D 0.40" 0.03" D 99.5 A A D A 1100 0.05 ~0.2 Si+Fe 1.0" D 0.1" 0.05" D D D D 99 A A D A 2011 5~6 0.40" D 0.30" D D 0.7" Bi0.2 ~0.6 Pb0.2 ~0.6 잔량 C D A C 2014 3.9 ~5.0 0.5 ~1.2 0.2 ~0.8 0.25" 0.4 ..