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AWS E3155 (W73155) Weld Metal

AWS E3155 is a weld metal formulated for joining stainless steels. Cited properties are appropriate for the as-welded condition. E3155 is the AWS designation for this material. W73155 is the UNS number.

It has the highest base cost among stainless steel welding fillers. In addition, it has the highest embodied energy and a moderately low thermal conductivity.

The graph bars on the material properties cards below compare AWS E3155 to: stainless 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

210 GPa 30 x 106 psi

Elongation at Break

23 %

Poisson's Ratio

0.29

Shear Modulus

81 GPa 12 x 106 psi

Tensile Strength: Ultimate (UTS)

770 MPa 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

310 J/g

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1410 °C 2560 °F

Specific Heat Capacity

450 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

13 W/m-K 7.2 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

70 % relative

Density

8.4 g/cm3 520 lb/ft3

Embodied Carbon

7.7 kg CO2/kg material

Embodied Energy

110 MJ/kg 46 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

PREN (Pitting Resistance)

35

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

26 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

3.3 mm2/s

Thermal Shock Resistance

20 points

Alloy Composition

Iron (Fe) 23.3 to 36.3
Chromium (Cr) 20 to 22.5
Nickel (Ni) 19 to 21
Cobalt (Co) 18.5 to 21
Molybdenum (Mo) 2.5 to 3.5
Tungsten (W) 2.0 to 3.0
Manganese (Mn) 1.0 to 2.5
Niobium (Nb) 0.75 to 1.3
Silicon (Si) 0 to 1.0
Copper (Cu) 0 to 0.75
Carbon (C) 0 to 0.1
Phosphorus (P) 0 to 0.040
Sulfur (S) 0 to 0.030

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

Followup Questions

Similar Alloys

Further Reading

AWS A5.4: Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding

Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012