# 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 10 ^{6} psi*

Elongation at Break

38 *%*

Poisson's Ratio

0.3

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

500 *MPa* 73 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

220 *MPa* 32 *x 10 ^{3} 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/cm ^{3}* 520

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

77 *MJ/kg* 33 *x 10 ^{3} BTU/lb*

Embodied Water

130 *L/kg* 16 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

150 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

130 *kJ/m ^{3}*

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

Fe | 50.7 to 56.5 | |

Ni | 43.5 to 46.5 | |

Mn | 0 to 0.8 | |

Si | 0 to 0.5 | |

Co | 0 to 0.5 | |

Cr | 0 to 0.3 | |

Mo | 0 to 0.3 | |

Cu | 0 to 0.3 | |

C | 0 to 0.050 | |

S | 0 to 0.030 | |

P | 0 to 0.010 |

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

## Followup Questions

## 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