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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

Iron (Fe) 40.7 to 51.8
Nickel (Ni) 33 to 37
Chromium (Cr) 14 to 17
Manganese (Mn) 1.0 to 2.5
Silicon (Si) 0 to 1.0
Molybdenum (Mo) 0 to 0.75
Copper (Cu) 0 to 0.75
Carbon (C) 0.18 to 0.25
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