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
| Fe | 23.3 to 36.3 | |
| Cr | 20 to 22.5 | |
| Ni | 19 to 21 | |
| Co | 18.5 to 21 | |
| Mo | 2.5 to 3.5 | |
| W | 2.0 to 3.0 | |
| Mn | 1.0 to 2.5 | |
| Nb | 0.75 to 1.3 | |
| Si | 0 to 1.0 | |
| Cu | 0 to 0.75 | |
| C | 0 to 0.1 | |
| P | 0 to 0.040 | |
| 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