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AWS E80C-B8 or E55C-B8 Weld Metal

AWS E80C-B8 is a weld metal formulated for joining alloy steels. Cited properties are appropriate for the post-weld heat treated (PWHT) condition. It has a very low thermal conductivity among alloy steel welding fillers. In addition, it has a fairly high base cost and a fairly high embodied energy.

The graph bars on the material properties cards below compare AWS E80C-B8 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 28 x 10⁶ psi

Elongation at Break

19 %

Poisson's Ratio

0.28

Shear Modulus

75 GPa 11 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

620 MPa 89 x 10³ psi

Tensile Strength: Yield (Proof)

540 MPa 78 x 10³ psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1450 °C 2650 °F

Melting Onset (Solidus)

1410 °C 2570 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

25 W/m-K 15 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

9.1 % IACS

Electrical Conductivity: Equal Weight (Specific)

11 % IACS

Otherwise Unclassified Properties

Base Metal Price

6.5 % relative

Density

7.8 g/cm³ 490 lb/ft³

Embodied Carbon

2.1 kg CO₂/kg material

Embodied Energy

28 MJ/kg 12 x 10³ BTU/lb

Embodied Water

89 L/kg 11 gal/lb

Common Calculations

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m³

Resilience: Unit (Modulus of Resilience)

740 kJ/m³

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

6.9 mm²/s

Thermal Shock Resistance

17 points

Alloy Composition

Iron (Fe)Fe		85.5 to 90.6
Chromium (Cr)Cr		8.0 to 10.5
Molybdenum (Mo)Mo		0.8 to 1.2
Manganese (Mn)Mn		0.4 to 1.0
Silicon (Si)Si		0.25 to 0.6
Copper (Cu)Cu		0 to 0.35
Nickel (Ni)Ni		0 to 0.2
Carbon (C)C		0 to 0.1
Vanadium (V)V		0 to 0.030
Phosphorus (P)P		0 to 0.025
Sulfur (S)S		0 to 0.025
Residualsres.		0 to 0.5