1. Alousip castings over 80 mm in diameter have intolerable liqua-tion of the lead over their height.n2. The microstructure of alcusip is characterized by considerable nonuniformity. The ground mass - the ferrous component Al Fe Si_ with CuAl2 crystals - is comparatively hard, while the inclusions of lead and the solid solution of copper in aluminum are soft.n3. As the lead content in the alcusip increases, the strength and hardness decline and the relative elongation increases.
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