High performance Pfinodal® copper alloy Strip AMETEK Specialty Metal Products (SMP) manufactures Pfinodal® (C72900) copper alloy strip through wrought powder metallurgy. Major advantages include: • Highly resistant to shrinkage and warpage – up to 10x more than BeCu. • Excellent solderability and resistance to intermetallic formation at high temperature. • Excellent corrosion resistance and ease of cleaning. • Lower initial cost and processing cost

High performance Pfinodal® copper alloy Strip High Performance Pfinodal® Copper alloy strip SPINODAL Metallurgy • Spinodal strengthening occurs spontaneously during aging and results from submicroscopic chemical composition fluctuations. • For Pfinodal®, the alloying elements are homogeneous throughout the strip prior to aging due to the wrought powder metallurgy process. • Spinodal hardening is a distinctly different metallurgy process. PFINODAL® CHEMICAL COMPOSITION Nickel Copper and named elements Other elements C72900 is CDA-UNS designation for Cu-15 Ni-8 Sn alloy. ASTM B-740 standard specification...

High performance Pfinodal® copper alloy Strip Available in age hardEnable Tempers MECHANICAL PROPERTIES OF PFINODAL® ALLOY C72900 Age Hardenable (annealed and cold worked) Minimum Bend Ratio Standard Designation Temper Name MECHANICAL PROPERTIES OF PFINODAL® ALLOY C72900 Age Hardened (annealed and cold worked, parts age hardened) Standard Designation Spinodal Hardening Treatment Available in Mill hardened Tempers MILL HARDENED TEMPER DESIGNATIONS FOR PFINODAL® C72900 (cold worked and hardened) Minimum Bend Ratio Standard Designation *Minimum bend radius measured in 3 point bending in

High performance Pfinodal® copper alloy Strip 0.01% YIELD STRENGTH VS. 0.2% YIELD STRENGTH FOR PFINODAL® AND BeCu STRIP 0.01% OFFSET YIELD STRENGTH (ksi) Mill Hardened PFINODAL® C72900 Pfinodal® parts can be age hardened with a simple heat treatment and no distortion of parts will occur. No fixturing is required. Age hardenable Pfinodal® is recommended for part geometries requiring the highest strength with excellent formability. Other age hardenable alloys, such as beryllium-copper, can severely distort during the hardening heat treatment. This distortion, caused by differential shrinkage, can...

High performance Pfinodal® copper alloy Strip Stress/Thermal Relaxation The significance of high temperature stress (thermal) relaxation resistance of Pfinodal® is the maintenance of contact spring pressure over a long period of time at high temperature. When a contact engages the mating members are deflected and elastic stress and strain forms along the length of the beam. Over a long period of time at room temperature, essentially none of this stress or strain is lost. As the temperature increases, some of the elastic stress in ordinary alloys relaxes and the elastic strain is converted to...

High performance Pfinodal® copper alloy Strip Equipment and Atmosphere Aging of Pfinodal® is best performed in recirculating ovens having excellent temperature uniformity. Vacuum or muffle type furnaces may be used, and as with all furnaces or ovens, furnace loading and temperature control should be taken into consideration to be certain that all parts attain the proper temperature. Any common inert or reducing atmosphere can be used. To take advantage of the excellent surface characteristics of Pfinodal®, a slightly reducing atmosphere such as nitrogen-3% hydrogen (forming gas) is preferred....

High performance Pfinodal® copper alloy Strip Burn-In and Elevated Temperature Applications In order to insure good, long-term solder joint properties at a high temperature, proper selection of a solder is required. Pfinodal® C72900 Copper-Nickel-Tin Spinodal Alloy provide high reliability at an economical cost for applications at normal temperatures as well as for higher temperature usage. For burn-in and elevated temperature applications in the range from 125OC to 225OC, Pfinodal® delivers superior resistance to stress relaxation for long life, in addition to excellent surface characteristics...

High performance Pfinodal® copper alloy Strip About AMETEK Specialty Metal Products AMETEK Specialty Metal Products (SMP) is a division of AMETEK, Inc. a leading global manufacturer of electronic instruments and electromechanical devices with annual sales of approximately $5 billion. AMETEK has 18,000 colleagues at more than 150 operating locations, and a global network of sales, service and support locations in 30 countries around the world. The Specialty Metal division consists of five businesses and operating facilities in the United States and the United Kingdom, all proven experts in the...