Standard silver plating (80–110 HV) is prized for high electrical conductivity, but its soft nature makes it highly susceptible to mechanical wear, high friction, and surface tarnishing/discoloration over time. In high-cycle sliding contacts and high-power connectors, conventional silver coatings wear down rapidly, causing contact failure and requiring frequent component replacement. Moreover, attempts to harden silver coatings often severely compromise conductivity or contact performance.

Our Competitive Advantages & Key Differentiators:
Mitsuya’s new & improved Hard Silver Plating achieves significantly higher hardness (150–180 HV) while maintaining low contact resistance (0.76 µΩ, nearly equal to conventional silver’s 0.6 µΩ).

・Superior Mechanical Hardness & Low Friction: Delivers 150–180 HV hardness and a substantially lower coefficient of friction compared to conventional silver, dramatically reducing wear during repeated insertion and sliding cycles.

・Enhanced Discoloration Resistance: Formulated to resist surface oxidation and discoloration (tested under JIS H8521 24-hour testing), ensuring long-term visual and electrical stability.

・Applicable Substrate Materials: Suitable for direct plating onto Copper, Copper Alloys (Brass, Phosphor Bronze), Stainless Steel (SUS), Aluminum, and Nickel/Steel Substrates.

・Target Industries & Key Applications: Ideal for Automotive & EV (high-voltage connectors, charging plugs), Semiconductors & Electronics (switches, high-cycle testing probes), Power & Energy (heavy-duty switches, busbars), and Industrial Equipment (sliding contacts and high-wear components).