Type 4 (2.4545, N14080) Nickel-Iron Soft Magnetic Alloy
Type 4 magnetic alloy is a nickel alloy formulated for primary forming into wrought products. Type 4 is the ASTM designation for this material. 2.4545 is the EN numeric designation. And N14080 is the UNS number.
The properties of Type 4 magnetic alloy include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare Type 4 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
190 GPa 28 x 106 psi
Elongation at Break
2.0 to 40 %
Fatigue Strength
220 to 400 MPa 31 to 58 x 103 psi
Poisson's Ratio
0.31
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
420 to 630 MPa 61 to 91 x 103 psi
Tensile Strength: Ultimate (UTS)
620 to 1100 MPa 89 to 160 x 103 psi
Tensile Strength: Yield (Proof)
270 to 1040 MPa 39 to 150 x 103 psi
Thermal Properties
Curie Temperature
460 °C 860 °F
Latent Heat of Fusion
290 J/g
Maximum Temperature: Mechanical
900 °C 1650 °F
Melting Completion (Liquidus)
1420 °C 2590 °F
Melting Onset (Solidus)
1370 °C 2500 °F
Specific Heat Capacity
440 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
11 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
60 % relative
Density
8.8 g/cm3 550 lb/ft3
Embodied Carbon
10 kg CO2/kg material
Embodied Energy
140 MJ/kg 59 x 103 BTU/lb
Embodied Water
210 L/kg 26 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
22 to 200 MJ/m3
Resilience: Unit (Modulus of Resilience)
190 to 2840 kJ/m3
Stiffness to Weight: Axial
12 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
19 to 35 points
Strength to Weight: Bending
18 to 27 points
Thermal Shock Resistance
21 to 37 points
Alloy Composition
| Ni | 79 to 82 | |
| Fe | 9.5 to 17.5 | |
| Mo | 3.5 to 6.0 | |
| Mn | 0 to 0.8 | |
| Si | 0 to 0.5 | |
| Co | 0 to 0.5 | |
| Cr | 0 to 0.3 | |
| Cu | 0 to 0.3 | |
| 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)
Metallic Materials: Physical, Mechanical, and Corrosion Properties, Philip A. Schweitzer, 2003
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971