EFI Alloy 79 Soft Magnetic Alloy

EFI Alloy 79 (aka Magnifer 7904², Hipernom¹, Moly-Permalloy, Permalloy 80) is a soft magnetic alloy consisting of 80% Nickel, 5% Molybdenum, and balance Iron used where extremely high initial & maximum permeability and minimum hysteresis is needed.

EFI Alloy 79 Products

Ed Fagan Europe Ltd. stocks EFI Alloy 79 in a variety of forms and dimensions. Below are most of the standard stock form/sizes. If you do not see the size or form of EFI Alloy 79 that you require, please call one of our materials experts; our sales people are very knowledgeable and can assist you. We can cut, slit, shear, or center less grind EFI Alloy 79 to your exact specifications, and we also have tremendous versatility when it comes to custom sizes, packages, and unusual materials.

EFI Alloy 79 Sheet Annealed
EFI Alloy 79 Sheet Thickness	EFI Alloy 79 Sheet Thickness
0.254 mm EFI Alloy 79 Sheet	1.016 mm EFI Alloy 79 Sheet
0.355 mm EFI Alloy 79 Sheet	1.270 mm EFI Alloy 79 Sheet
0.508 mm EFI Alloy 79 Sheet	1.574 mm EFI Alloy 79 Sheet
0.635 mm EFI Alloy 79 Sheet	3.175 mm EFI Alloy 79 Sheet
0.762 mm EFI Alloy 79 Sheet

EFI Alloy 79 Strip/Coil Annealed
EFI Alloy 79 Strip/Coil Thickness	EFI Alloy 79 Strip/Coil Thickness
0.101 mm EFI Alloy 79 Strip/Coil	0.508 mm EFI Alloy 79 Strip/Coil
0.254 mm EFI Alloy 79 Strip/Coil	0.635 mm EFI Alloy 79 Strip/Coil
0.355 mm EFI Alloy 79 Strip/Coil

EFI Alloy 79 Rod
EFI Alloy 79 Rod Diameter	EFI Alloy 79 Rod Diameter
3.556 mm EFI Alloy 79 Rod	12.70 mm EFI Alloy 79 Rod
5.537 mm EFI Alloy 79 Rod	15.875 mm EFI Alloy 79 Rod
6.350 mm EFI Alloy 79 Rod	19.050 mm EFI Alloy 79 Rod
9.525 mm EFI Alloy 79 Rod	25.40 mm EFI Alloy 79 Rod
10.414 mm EFI Alloy 79 Rod	31.750 mmEFI Alloy 79 Rod
10.769 mm EFI Alloy 79 Rod	41.275 mm EFI Alloy 79 Rod

Applications

Electro-magnetic shielding, specialty transformer laminations, toroidal tape wound cores, high quality motor laminations, stepping motors.

EFI Alloy 79 Properties

EFI Alloy 79 Typical DC Magnetic Properties
Saturation Induction - Gausses	8,700
Maximum Permeability	230,000
Coercive Force - Oersteds	0.015
Coercive Force - A/m	1.19

EFI Alloy 79 Typical AC Magnetic Properties
Core Loss W/lb @ 400Hz & 20k G	N/A
B-40 Permeability @ 60Hz	45,000
N/A = not a typical application value

EFI Alloy 79 Physical Properties
Density	lb/cu in	0.316
Specific Gravity		8.74
Curie Temp	°F	860
	°C	460
Melting Point	°F	2650
	°C	1454
Electrical Resistivity	Micro-ohm-cm	59
	ohm-cir mil/ft	394
Thermal Conductivity	W/cm °C	0.35
	BTU-in/sq. ft-hr-	240
Specific Heat	Cal/g- °C	--
	BTU/lbm- °F	--
Thermal Expansion	ppm / °F (75°F to 842°F)	7.5
	ppm / °C (25°C to 450°F)	13.6

EFI Alloy 79 Mechanical Properties
Tensile Strength	ksi	98
	MPa	676
Yield Strength	ksi	38
	MPa	262
Elongation	% in 2 in.	40
Typical Hardness Ann.	Rockwell HRB	85
Modulus of Elasticity	Mpsi	31.4
	kMPa	217

EFI Alloy 79 Chemistry
maximum % unless noted
Iron	Bal
Nominal Nickel	80
Nominal Cobalt	--
Molybdenum	5.0
Carbon	0.03
Manganese	0.95
Silicon	0.42
Vanadium	--
Niobium	--
Phosphorus	0.02
Sulfur	0.008

EFI Alloy 79 Specifications
ASTM A753	MIL N-14411C

ED FAGAN Europe Ltd. supplies the highest quality special purpose alloys and metals for Aerospace/Aviation, Defence, Magnetic, Electronics, Telecommunications, Lighting, Optical, Ceramics, Heat Treating, Medical, and other high-technology industries.

1. Trademark Carpenter Technology Corp., Reading PA
2. Trademark ThyseenKrupp-VDM, Germany

Soft Magnetic Alloys

Ed Fagan Europe Ltd. stocks a variety of soft magnetic alloys for wide range of applications. EFI carries:
EFI Alloy 79
EFI Alloy 50
Hiperco 50
Vim Var Core Iron
Radiometal 4550

And we also have a large selection of other types of specialty metals and alloys for high technology applications, including:
Controlled Expansion Alloys
Electrical/Electronic Nickel
Refractory Metals and Alloys
Hard to Find Materials