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Constantan, also known in various contexts as Eureka, Advance, and Ferry, refers to a copper-nickel alloy commonly used for its stable electrical resistance across a wide range of temperatures. [1] It usually consists of 55% copper and 45% nickel. [ 2 ]
Constantan ; Copper hydride ; Copper–tungsten ; Corinthian bronze (gold, silver) Cunife (nickel, iron) Cupronickel ; CuSil ; Cymbal alloys ; Devarda's alloy (aluminium, zinc) Hepatizon (gold, silver) Manganin (manganese, nickel) Melchior ; high corrosion resistance, used in marine applications in condenser tubes
Manganin is a trademarked name for an alloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887). Manganin foil and wire is used in the manufacture of resistors , particularly ammeter shunts , because of its virtually zero temperature coefficient of ...
Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.)
Constantan (Cu 55 Ni 45) has a low temperature coefficient of resistivity; and as a copper alloy, it is easily soldered. Other constant-resistance alloys include manganin (Cu 86 Mn 12 Ni 2), Cupron (Cu 53 Ni 44 Mn 3) [2] and Evanohm. Melts at about 1,220 °C (2,230 °F).
The positive wire is made of hard iron, while the negative wire consists of softer copper-nickel. [11] Due to its iron content, the J-type is slightly heavier and the positive wire is magnetic. [12] It is highly vulnerable to corrosion in reducing atmospheres, which can lead to significant degradation of the thermocouple's performance. [13]
The proposed NewRange Copper Nickel mine in northeastern Minnesota suffered a fresh setback this week when an administrative law judge recommended that state regulators should not reissue a ...
Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c ...