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Annealed Type 1 Iron-Nickel Soft Magnetic Alloy

Annealed Type 1 magnetic alloy is Type 1 magnetic alloy in the annealed condition. The graph bars on the material properties cards below compare annealed Type 1 magnetic alloy to: otherwise unclassified iron alloys (top), all iron 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 27 x 106 psi

Elongation at Break

38 %

Poisson's Ratio

0.3

Shear Modulus

72 GPa 10 x 106 psi

Tensile Strength: Ultimate (UTS)

500 MPa 73 x 103 psi

Tensile Strength: Yield (Proof)

220 MPa 32 x 103 psi

Thermal Properties

Curie Temperature

440 °C 820 °F

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1420 °C 2590 °F

Melting Onset (Solidus)

1370 °C 2500 °F

Specific Heat Capacity

460 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

3.1 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

31 % relative

Density

8.3 g/cm3 520 lb/ft3

Embodied Carbon

5.6 kg CO2/kg material

Embodied Energy

77 MJ/kg 33 x 103 BTU/lb

Embodied Water

130 L/kg 16 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

150 MJ/m3

Resilience: Unit (Modulus of Resilience)

130 kJ/m3

Stiffness to Weight: Axial

12 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

17 points

Thermal Shock Resistance

16 points

Alloy Composition

Iron (Fe)Fe 50.7 to 56.5
Nickel (Ni)Ni 43.5 to 46.5
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
Molybdenum (Mo)Mo 0 to 0.3
Copper (Cu)Cu 0 to 0.3
Carbon (C)C 0 to 0.050
Sulfur (S)S 0 to 0.030
Phosphorus (P)P 0 to 0.010

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

How are the material properties defined?How do I compare this exact variant to another material?

Further Reading

ASTM A753: Standard Specification for Wrought Nickel-Iron Soft Magnetic Alloys (UNS K94490, K94840, N14076, N14080)

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015