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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

Nickel (Ni)Ni 79 to 82
Iron (Fe)Fe 9.5 to 17.5
Molybdenum (Mo)Mo 3.5 to 6.0
Manganese (Mn)Mn 0 to 0.8
Silicon (Si)Si 0 to 0.5
Cobalt (Co)Co 0 to 0.5
Chromium (Cr)Cr 0 to 0.3
Copper (Cu)Cu 0 to 0.3
Carbon (C)C 0 to 0.050
Sulfur (S)S 0 to 0.020
Phosphorus (P)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