Micro-alloyed cold-rolled strips - Import export

At AMETEK Specialty Metal Products we produce high purity nickel-iron alloy strips, which are primarily used for reed switch systems. These products are widely used in the automotive market for BMS (Battery Management Systems), improved safety in proximity sensors, and cable harness testing. Alloys Our strips are produced using nickel-iron compositions, making sure to use source metals with market leading low levels of trace elements. Alloys include: Nickel-Iron compositions from 36% to 65% Nickel. Sizes Strip thicknesses down to 0.002” (0.0508mm) and wire diameters as small as 0.005” (0.127mm). Applications Finished nickel-iron alloy reed switch systems are used within a multitude of products and devices, mainly being used in the Automotive and Electronics industries. Automotive: BMS (Battery Management Systems), automatic braking assists, door sensors and speedometers.

Constantan® is a copper-nickel alloy that contains specific minor amounts of additional elements to achieve precise values for the temperature coefficient of resistivity. Careful control of melting and conversion practices results in a very low level of pinholes at ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges. The TCR can be adjusted from the furnished cold rolled values by using a low temperature heat treatment to achieve compensation for all types of spring elements. The foil is normally supplied with 90% cold reduction and a smooth bright surface. The foil is reasonably flat at 4” wide and nearly free of pinholes. The cold rolled foil can be produced with a TCR between +10 to –35 PPM/°C. The heat treatment will shift the foil TCR to the desired value. A typical heat-treat curve for Constantan® shows decreasing resistivity but increasing TCR with increased heat-treating temperature.