Mumetal is available in Mumetal wire, Mumetal Round bar, Mumetal Forged bar, Mumetal hex bar, Mumetal Flat bar, Mumetal Circles, Mumetal Ring, Mumetal Tube, Mumetal seamless Pipe, Mumetal Welded / ERW Pipe, Mumetal Sheet, Mumetal Plate, Mumetal Coil, Mumetal Flanges, Mumetal fasteners, Mumetal Socket weld Fittings, Mumetal ferrule fittings, Mumetal Buttweld fittings Like cap, elbow, tee, Reducer. For all stock availability contact Sales.
| Alloy Name | Trade Name | UNS No. | American Specs |
| Mu-Metal | Hy-Mu 80 Permalloy |
MIL-N-14411 C ASTM A753 |
| Chemical Composition Limits | ||||||||||
| Weight% | Ni | Cu | Cr | S | P | Si | Mn | C | Mo | Fe |
| Hymu 80 (Comp1) | 79.0-80.6 | 0.008 | 0.02 | 0.42 | 0.95 | 0.03 | 3.8-5 | Rem | ||
| MIL N 14411C (Comp2) | 75.0-77.0 | 4.0-6.0 | 3.0 | 0.02 | 0.02 | 0.50 | 1.8 | 0.05 | ||
Mumetal is 80% nickel with additions of iron and molybdenum as main elements in turn this alloy offers an extremely high initial permeability. It is only moderately resistant to moisture and atmospheric corrosion, it used mainly in in transformer cores but is well known for its magnetic properties which are used for shielding electrical components from magnetic fields. "HYMU 80" has a minimum DC permeability of 80,000 at a flux density of 40 gauss when heat treated by the recommended procedure and test in accordance with ASTM 596
Typical Mechanical Properties
| Mu-Metal | ||
| Yield Strength (psi) | Tensile Strength (psi) | Elongation in 2" (%) |
| 44,000 | 100,000 | 40 |
| Mechanical Properties in the Annealed Condition | ||
Physical Properties (Annealed Condition)
Specific Gravity - 8.7g/cm
Curie Temperature - 830°F (410°C)
Electrical Resistivity, 349 ohm circ mil/foot 0.55 ohm mm²m
Density lb/cu.in. - 316
Thermal Conductivity - 134 btu-inch/ft hour °F 0.32 W/cm °C
Coefficient of Thermal Expansion, in./in. °F x 10
7.2in/in °F x 10-6 between 70 and 400F
13cm/cm/ °C 10-6 between 30 and 204 °C
Specifications
Permalloy
HYMU 80
MAG 7904
MIL N 14411 C, COMP. 1
ASTM A753-78 and ASTM 596
Harsh steel is a major stockist and Exporter of Mumetal to many countries of the world such as Singapore, Brisbane, Sydney, Melbourne, Australia, Houston, TX, San Diego, San Francisco, Atlanta, USA, Brentford, United Kingdom, Phoenix, Ireland, New Zealand and Canada, Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, Newfoundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran, Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton.