The invention discloses a lead-based
alloy for a cable sheath. The lead-based
alloy for the cable sheath is manufactured from the ingredients comprising, by weight, 0.1-0.4% of
antimony, 0.3-0.6% of
tin, silver 0.02-0.05% of silver, 0.01-0.03% of
copper, 0.04-0.08% of
bismuth and the balance lead. The lead-based
alloy for the cable sheath has the advantages that the
bismuth and
copper elements caneffectively improve the
processing properties, such as strength, flexibility and
ductility, of the lead-based alloy but increase the
brittleness of the alloy at the same time, and the addition of tincan significantly improve the
brittleness caused by the addition of
antimony and
copper and also improve the fluidity and flexibility of lead; the addition of silver can significantly improve the
corrosion resistance of the lead-base alloy. Because the
bismuth and the lead have similar atomic sizes, the bismuth and the lead can be mixed at any ratio, the bismuth and the lead can form a substitutional
solid solution, so that the consistency and compactness of the lead-based alloy can be effectively improved, and the
moisture-proof and waterproof properties of the lead-based alloy are improved.The elements of
antimony,
tin, copper, silver and antimony all can be well compatible with the lead, the ingredients are evenly distributed and stable, and the lead-based alloy is good in consistency.