Manganin, Manganin Alloy, Manganin shunt, Manganin strip, Manganin wire, Nickel plated copper wire, CuMn12Ni, CuMn4Ni, Manganin copper alloy, HAI, ASTM B 267 Class 6, Class 12, Class 13. Class 43,
Manganin Alloy Description:
a) Manganin is a trademarked name for an alloy of typically 86% copper, 12% manganese, and 2% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887).
b) A resistance alloy with moderate resistivity and low temperature coefficent. The resistance/temperature curve is not as flat as the constantans nor are the corrosion resistance properties as good.
c) Manganin foil and wire is used in the manufacture of resistors, particularly ammeter shunts, because of its virtually zero temperature coefficient of resistance value[1] and long term stability. Several Manganin resistors served as the legal standard for the ohm in the United States from 1901 to 1990.[2] Manganin wire is also used as an electrical conductor in cryogenic systems, minimizing heat transfer between points which need electrical connections.
d) Manganin is also used in gauges for studies of high-pressure shock waves (such as those generated from the detonation of explosives) because it has low strain sensitivity but high hydrostatic pressure sensitivity. Source: Wikipedia
Manganin Alloy Available From READE:
a) Manganin shunt
b) Manganin strip
c) Manganin wire
d) Manganin foil
Manganin Alloy Typical Chemistry:
86% copper, 12% manganese, and 2% nickel
Manganin Alloy Typical Properties:
a) Alloy Composition: Cu86/Mn12/Ni2
Electrical Properties:
Temperature coefficient ( K-1 ) 0.00001
Electrical resistivity ( µOhmcm ) 43-48
Mechanical Properties:
Elongation at break ( % ) <50
Izod impact strength ( J m-1 ) 107
Modulus of elasticity ( GPa ) 124-159
Tensile strength ( MPa ) 300-600
Physical Properties:
Density ( g cm-3 ) 8.4
Melting point ( C ) 960
Thermal Properties:
Coefficient of thermal expansion ( x10-6 K-1 ) 14-19 @ 20-100C
Maximum use temperature in air ( C ) 300
Thermal conductivity ( W m-1 K-1 ) 22 @ 23C
b) Alloy Composition: Cu84/Mn12/Ni4
Temperature coefficient of resistivity
TempDegC (Somerville 1910)
12 .000006
25 .000000
100 -.000042
250 -.000052
475 .000000
500 +.00011
Resistance of Wires - 20 deg C
Manganin Q = 44. x 10-6 ohm cm
Gage B&S / ohms per cm / ohms per ft
10 .000836 .0255
12 .00133 .0405
14 .00211 .0644
16 .00336 .102
18 .00535 .163
20 .00850 .259
22 .0135 .412
24 .0215 .655
26 .0342 1.04
27 .0431 1.31
28 .0543 1.66
30 .0864 2.63
32 .137 4.19
34 .218 6.66
36 .347 10.6
40 .878 26.8
Manganin Alloy CAS Number:
CAS# 12606-19-8
