Manganin
Sign in to saveManganin 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).
Key facts
- Material.name
- Manganin
- Material.image
- 1900 Reichenstalt Pattern Resistor.jpg
- Material.caption
- A manganin resistor made in 1900 at the Bushy House physics laboratory.
- Material.type
- Copper-manganese alloy
- Material.tensile_strength
- 300–600 MPa
- Material.elongation
- < 50%
- Material.izod_impact_strength
- 107 J/m
- Material.melting_point
- 1020 °C
- Material.thermal_conductivity_note
- at
- Material.thermal_conductivity
- 22 W/(m·K)
- Material.specific_heat
- 0.097 cals/gm
- Material.volume_resistivity
- 43–48 μΩ⋅cm
- Material.footnotes
- Source
via Wikipedia infobox
Wikidata facts
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- Commons category
- Manganin
Sources (2)
via Wikidata · CC0
~5 min read
Article
10 sectionsContents
- History
- Invention and early development
- Standardization
- Refinement at NBS
- Modern legacy
- Properties
- Cu86/Mn12/Ni2
- See also
- References
- External links
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 resistance value and long term stability. Several Manganin resistors served as the legal standard for the ohm in the United States from 1901 to 1990. Manganin wire is also used as an electrical conductor in cryogenic systems, minimizing heat transfer between points which need electrical connections.