# 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 10 ^{6} psi*

Elongation at Break

43 *%*

Fatigue Strength

170 *MPa* 25 *x 10 ^{3} psi*

Poisson's Ratio

0.31

Shear Modulus

70 *GPa* 10 *x 10 ^{6} psi*

Shear Strength

380 *MPa* 55 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

550 *MPa* 80 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

210 *MPa* 30 *x 10 ^{3} 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/cm ^{3}* 540

*lb/ft*

^{3}Embodied Carbon

8.7 *kg CO _{2}/kg material*

Embodied Energy

120 *MJ/kg* 52 *x 10 ^{3} BTU/lb*

Embodied Water

220 *L/kg* 26 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

190 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

120 *kJ/m ^{3}*

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