Chemical components

Product Description

ERCuSn-C is a premium phosphor bronze solid welding wire compliant with AWS A5.7/A5.7M standards, designed for phosphor bronze alloys (C52100) and similar copper-tin alloys. Featuring a balanced composition with 7.0-9.0wt.% tin, phosphorus (0.10-0.35wt.%), and high-purity copper base (balance), it excels in applications requiring high strength and wear resistance. Compatible with GTAW (TIG) and GMAW (MIG) processes, it supports welding of copper-based alloys, dissimilar metal joints (copper to steel/brass), and hardfacing overlay applications.

Features

▪ Superior Mechanical Properties: Offers excellent tensile strength (260MPa), elongation (≥20%), and hardness (80HB) due to optimized tin content. The weld deposits exhibit high strength, good toughness, and wear resistance, matching or exceeding base material properties for demanding applications.
▪ Corrosion Resistance: Provides good resistance to atmospheric corrosion, seawater, and weak acidic environments. The phosphorus addition enhances fluidity and reduces porosity, ensuring dense, corrosion-resistant weld deposits suitable for marine and industrial applications.
▪ Excellent Weldability: Ensures smooth weld formation with good wetting characteristics and easy slag removal. Compatible with argon or argon-helium shielding gases, it adapts to various welding conditions. Preheat is recommended for thick sections (≤100℃ interpass temperature), and pulsed arc welding is suggested for multi-layer overlays on steel.

Applications

▪ Ideal for applications requiring high strength, wear resistance, and corrosion resistance, CuSn9P is widely used in:
▪ Marine Industry: Ship propellers, pump shafts, marine hardware, and seawater piping components requiring excellent saltwater corrosion resistance and wear properties.
▪ Machinery & Equipment: Bearings, bushings, gears, valve seats, and wear surfaces on shafts and couplings. Used for maintenance repair and fabrication of industrial equipment subject to friction and wear.
▪ Electrical & Electronics: Electrical connectors, switch components, and conductive parts requiring good electrical conductivity combined with mechanical strength and spring properties.
▪ Dissimilar Metal Joining: Copper-to-steel, copper-to-brass, and bronze-to-steel joints in heat exchangers, condensers, and refrigeration equipment. Also used for hardfacing overlays on cast iron and steel components to improve wear resistance and service life.