AWS E330 (W88331) Weld Metal
AWS E330 is a weld metal formulated for joining stainless steels. Cited properties are appropriate for the as-welded condition. E330 is the AWS designation for this material. W88331 is the UNS number. Additionally, the ISO numeric designation is ES330.
It has a moderately low electrical conductivity among stainless steel welding fillers. In addition, it has a fairly low thermal conductivity and a moderately low tensile strength.
The graph bars on the material properties cards below compare AWS E330 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
190 GPa 28 x 106 psi
Elongation at Break
29 %
Poisson's Ratio
0.29
Shear Modulus
76 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
580 MPa 84 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Melting Completion (Liquidus)
1400 °C 2550 °F
Melting Onset (Solidus)
1350 °C 2470 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
12 W/m-K 7.1 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.1 g/cm3 500 lb/ft3
Embodied Carbon
5.4 kg CO2/kg material
Embodied Energy
75 MJ/kg 32 x 103 BTU/lb
Embodied Water
180 L/kg 22 gal/lb
Common Calculations
PREN (Pitting Resistance)
17
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
3.2 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Fe | 40.7 to 51.8 | |
| Ni | 33 to 37 | |
| Cr | 14 to 17 | |
| Mn | 1.0 to 2.5 | |
| Si | 0 to 1.0 | |
| Mo | 0 to 0.75 | |
| Cu | 0 to 0.75 | |
| C | 0.18 to 0.25 | |
| 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