# AWS E90C-K3 or E62C-K3 Weld Metal

AWS E90C-K3 is a weld metal formulated for joining alloy steels. Cited properties are appropriate for the as-welded condition. It has the highest ductility among alloy steel welding fillers. In addition, it has a moderately high electrical conductivity and a moderately high tensile strength.

The graph bars on the material properties cards below compare AWS E90C-K3 to: alloy steel welding fillers (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

55 *%*

Poisson's Ratio

0.29

Shear Modulus

73 *GPa* 11 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

710 *MPa* 100 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

600 *MPa* 88 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

250 *J/g*

Melting Completion (Liquidus)

1460 *°C* 2650 *°F*

Melting Onset (Solidus)

1410 *°C* 2580 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

48 *W/m-K* 28 *BTU/h-ft-°F*

Thermal Expansion

13 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.9 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

9.0 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

3.4 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

23 *MJ/kg* 9.8 *x 10 ^{3} BTU/lb*

Embodied Water

53 *L/kg* 6.3 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

370 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

980 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

25 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

13 *mm ^{2}/s*

Thermal Shock Resistance

21 *points*

## Alloy Composition

Fe | 92.6 to 98.5 | |

Ni | 0.5 to 2.5 | |

Mn | 0.75 to 2.3 | |

Mo | 0.25 to 0.65 | |

Si | 0 to 0.8 | |

Cu | 0 to 0.35 | |

C | 0 to 0.15 | |

Cr | 0 to 0.15 | |

V | 0 to 0.030 | |

P | 0 to 0.025 | |

S | 0 to 0.025 | |

res. | 0 to 0.5 |

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

## Followup Questions

## Similar Alloys

## Further Reading

AWS A5.28: Specification for Low-Alloy Steel Electrodes and Rods for Gas Shielded Arc Welding

Welding Metallurgy, 2nd ed., Sindo Kou, 2003

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