2A12铝合金为一种高强度硬铝,可以进行热处理强化;2A12铝合金点焊焊接性良好,用气焊和氩弧焊时有形成晶间裂纹的倾向;2A12铝合金在冷作硬化后可切削性能尚好。抗蚀性不高,常采用阳极氧化处理与涂漆方法或表面加包铝层以提高抗腐蚀能力。
化学成分
●化学成分:
铝 Al :余量
硅 Si :≤0.50
铜 Cu :3.8~4.9
镁 Mg:1.2~1.8
锌 Zn:≤0.30
锰 Mn:0.30~0.9
钛 Ti :≤0.15
镍 Ni:≤0.10
铁 Fe: 0.000~ 0.500
铁+镍 Fe+Ni: 0.000~ 0.500
注:单个:≤0.05;合计:≤0.10
特性用途标准:GB/T 3191-2010 代替旧GB/T 3191-1998,
●用途:
用途主要用于制作各种高负荷的零件和构件(但不包括冲压件锻件)如飞机上的骨架零件,蒙皮,隔框,翼肋,翼梁,铆钉等150℃以下工作零件。
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