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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 106 psi

Elongation at Break

19 %

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

690 MPa 100 x 103 psi

Tensile Strength: Yield (Proof)

620 MPa 89 x 103 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/cm3 490 lb/ft3

Embodied Carbon

1.8 kg CO2/kg material

Embodied Energy

24 MJ/kg 10 x 103 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/m3

Resilience: Unit (Modulus of Resilience)

1000 kJ/m3

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 mm2/s

Thermal Shock Resistance

20 points

Alloy Composition

Iron (Fe) 93.5 to 95.9
Chromium (Cr) 2.3 to 2.7
Molybdenum (Mo) 0.9 to 1.2
Manganese (Mn) 0.4 to 0.7
Silicon (Si) 0.4 to 0.7
Copper (Cu) 0 to 0.35
Nickel (Ni) 0 to 0.2
Carbon (C) 0.070 to 0.12
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.025
Residuals 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