# AWS ER90S-B3 or ER62S-B3 (K30960) Weld Metal

AWS ER90S-B3 is a weld metal formulated for joining alloy steels. Cited properties are appropriate for the post-weld heat treated (PWHT) condition. ER90S-B3 is the AWS designation for this material. K30960 is the UNS number.

It has a moderately high base cost among the alloy steel welding fillers in the database.

The graph bars on the material properties cards below compare AWS ER90S-B3 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

19 *%*

Poisson's Ratio

0.29

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

620 *MPa* 89 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

260 *J/g*

Melting Completion (Liquidus)

1460 *°C* 2660 *°F*

Melting Onset (Solidus)

1420 *°C* 2590 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

40 *W/m-K* 23 *BTU/h-ft-°F*

Thermal Expansion

13 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.7 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.9 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

4.1 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

60 *L/kg* 7.2 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

6.0

Resilience: Ultimate (Unit Rupture Work)

130 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

1000 *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

11 *mm ^{2}/s*

Thermal Shock Resistance

20 *points*

## Alloy Composition

Fe | 93.5 to 95.9 | |

Cr | 2.3 to 2.7 | |

Mo | 0.9 to 1.2 | |

Mn | 0.4 to 0.7 | |

Si | 0.4 to 0.7 | |

Cu | 0 to 0.35 | |

Ni | 0 to 0.2 | |

C | 0.070 to 0.12 | |

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