Phosphorus Deoxidized Copper Strip

Updated: 2026-07-15

Overview

Phosphorus deoxidized copper strip is a high-purity copper alloy containing trace amounts of phosphorus (typically 0.015-0.040%) to enhance its electrical properties and resistance to hydrogen embrittlement. The phosphorus acts as a deoxidizer during production, removing residual oxygen that could otherwise reduce conductivity. This material exhibits superior electrical conductivity (≥98% IACS) compared to oxygen-bearing coppers, making it the preferred choice for critical electrical applications. Manufactured through continuous casting and cold rolling processes, the strip is available in various thicknesses (commonly 0.1-6mm) and tempers (soft, half-hard, hard). Its combination of high conductivity, excellent formability, and resistance to thermal fatigue has established it as an essential material in power transmission and electronics industries.

Physical and Chemical Properties

The material maintains copper's inherent high thermal conductivity (385 W/m·K) while achieving improved resistance to oxidation at elevated temperatures due to phosphorus content. Its electrical resistivity is approximately 1.72×10⁻⁸ Ω·m at 20°C, with temperature coefficient of 0.0039/°C. The phosphorus addition slightly reduces conductivity compared to pure copper (by about 1-3% IACS) but significantly improves workability and resistance to hydrogen embrittlement. Mechanically, the strip offers tensile strength ranging from 200-360 MPa depending on temper, with elongation properties of 15-50%. It maintains good corrosion resistance in most environments except those containing ammonia or sulfur compounds. The material is non-magnetic and exhibits excellent solderability and brazing characteristics without requiring additional surface treatments.

Main Applications

Primary applications include electrical busbars for power distribution systems, where its high current-carrying capacity and thermal stability are critical. Transformer manufacturers utilize the strip for winding conductors due to its consistent electrical properties and fatigue resistance. The electronics industry employs it in connectors, lead frames, and printed circuit board components where reliable conductivity is paramount. Other significant uses include grounding strips, electromagnetic shielding, and vacuum tube components. In renewable energy systems, it's increasingly specified for solar panel interconnects and wind turbine generator windings. The strip's formability allows for complex stamped parts in electrical switchgear, while its thermal properties make it suitable for heat exchanger components in specialized applications.

Safety and Storage

While generally safe to handle, precautions should be taken during machining to prevent inhalation of fine copper dust particles, which may cause respiratory irritation. Appropriate ventilation or respiratory protection is recommended for grinding or polishing operations. The material is not considered flammable, but dust accumulation can pose explosion hazards in extreme conditions. Storage requires protection from moisture and corrosive atmospheres to prevent surface oxidation. Ideally, the strip should be stored in its original packaging until use, with desiccants included for long-term storage. Stacking should be avoided to prevent deformation, especially for softer tempers. For optimal performance, the material should be cleaned with non-corrosive solvents before critical electrical applications to remove any surface contaminants.

B2B Procurement Guide

When sourcing phosphorus deoxidized copper strip, verify the material meets ASTM B152 or equivalent international standards (EN 13599, JIS H3100). Key specifications to confirm include phosphorus content (0.015-0.040%), oxygen content (<0.003%), and conductivity (minimum 98% IACS). Request mill test certificates for critical applications. Consider ordering pre-cut blanks or custom widths to minimize processing costs. For large-volume purchases, inquire about volume discounts and minimum order quantities. Lead times can vary from 2-8 weeks depending on specifications and supplier inventory. Quality suppliers should provide detailed technical data sheets and be able to demonstrate traceability of their raw materials. For specialized applications, consult with manufacturers about custom tempers or surface finishes (e.g., bright annealed).