Type 3 (N14076) Nickel-Iron Soft Magnetic Alloy
Type 3 magnetic alloy is a nickel alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. Type 3 is the ASTM designation for this material. N14076 is the UNS number.
It has a moderately low tensile strength among the wrought nickels in the database.
The graph bars on the material properties cards below compare Type 3 magnetic alloy to: wrought nickels (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
180 GPa 27 x 106 psi
Elongation at Break
43 %
Fatigue Strength
170 MPa 25 x 103 psi
Poisson's Ratio
0.31
Shear Modulus
70 GPa 10 x 106 psi
Shear Strength
380 MPa 55 x 103 psi
Tensile Strength: Ultimate (UTS)
550 MPa 80 x 103 psi
Tensile Strength: Yield (Proof)
210 MPa 30 x 103 psi
Thermal Properties
Curie Temperature
400 °C 750 °F
Latent Heat of Fusion
290 J/g
Maximum Temperature: Mechanical
910 °C 1670 °F
Melting Completion (Liquidus)
1370 °C 2490 °F
Melting Onset (Solidus)
1320 °C 2410 °F
Specific Heat Capacity
450 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
12 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.0 % IACS
Otherwise Unclassified Properties
Base Metal Price
55 % relative
Density
8.7 g/cm3 540 lb/ft3
Embodied Carbon
8.7 kg CO2/kg material
Embodied Energy
120 MJ/kg 52 x 103 BTU/lb
Embodied Water
220 L/kg 26 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m3
Resilience: Unit (Modulus of Resilience)
120 kJ/m3
Stiffness to Weight: Axial
12 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
17 points
Thermal Shock Resistance
18 points
Alloy Composition
| Ni | 75 to 78 | |
| Fe | 9.9 to 19 | |
| Cu | 4.0 to 6.0 | |
| Cr | 2.0 to 3.0 | |
| Mn | 0 to 1.5 | |
| Si | 0 to 0.5 | |
| Mo | 0 to 0.5 | |
| Co | 0 to 0.5 | |
| C | 0 to 0.050 | |
| S | 0 to 0.020 | |
| P | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A753: Standard Specification for Wrought Nickel-Iron Soft Magnetic Alloys (UNS K94490, K94840, N14076, N14080)
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015