Overview
Extruded lead wire is a versatile industrial product formed by forcing molten lead or lead alloys through a die to create uniform strands. Its high density (11.34 g/cm³) and malleability make it ideal for applications requiring weight, radiation absorption, or corrosion-resistant sealing. Commonly used in nuclear medicine, construction, and maritime industries, it is available in diameters ranging from 1 mm to 20 mm. Lead wire is typically produced from 99.9% pure lead or alloyed with elements like antimony (1–6%) to enhance hardness. Its extrusion process ensures consistent dimensions and surface finish, critical for precision applications such as electrical contacts or X-ray shielding.
Structure and Working Principle
Extruded lead wire is manufactured by heating lead to its melting point (327°C) and pressing it through a tungsten carbide die under hydraulic pressure. The process allows for tight tolerances (±0.1 mm) and customizable cross-sections (round, square, or flattened). Unlike cast lead products, extruded wire has a refined grain structure, improving tensile strength (up to 20 MPa for pure lead) and bendability. For specialized uses, alloys like lead-tin (PbSn) or lead-antimony (PbSb) are extruded to enhance properties such as creep resistance or solderability.
Key Features
Extruded lead wire offers unmatched density for its volume, making it 35% more effective than steel in radiation shielding. Its corrosion resistance stems from a natural oxide layer that prevents degradation in humid or chemical environments. Malleability allows cold-forming without cracking, enabling on-site adjustments. For high-temperature applications (e.g., battery terminals), antimony alloys retain shape up to 250°C. Electrically, lead wire has low resistivity (21 nΩ·m), suitable for grounding systems.
Application Areas
In healthcare, 4–6 mm diameter lead wire is woven into aprons or curtains for X-ray rooms. Construction uses it for expansion joint seals in bridges due to its waterproofing and vibration-damping properties. Marine industries employ lead wire as ballast in keels, while electronics rely on its solderability for component assembly. Emerging applications include nuclear waste containment and vibration isolation in industrial machinery.
Maintenance and Precautions
Lead wire requires minimal maintenance but should be stored dry to prevent surface oxidation. Clean with alcohol wipes if contaminated; avoid abrasive tools that generate dust. Workers must wear NIOSH-approved respirators when cutting or sanding lead wire. Dispose of scraps as hazardous waste per local regulations. For long-term outdoor use, consider PVC-coated variants to reduce environmental exposure.
B2B Procurement Guide
Industrial buyers should specify: alloy composition (e.g., ASTM B749 Grade C for 6% antimony), diameter tolerance (±0.05 mm for precision uses), and packaging (spools vs. straight lengths). MOQs typically start at 100 kg, with bulk discounts above 1 ton. Verify supplier certifications like ISO 9001 and RoHS compliance exemptions for lead. For radiation shielding, request mill test reports confirming purity. Just-in-time delivery is advisable due to lead’s price volatility tied to LME markets.
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