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AWS E310 vs. AWS E310Nb

Both AWS E310 and AWS E310Nb are iron alloys. Both are furnished in the as-welded condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is AWS E310 and the bottom bar is AWS E310Nb.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
29
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 620
620

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1360
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
14
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 26
31
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.6
5.3
Embodied Energy, MJ/kg 65
76
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 28
28
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
22
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 3.7
3.8
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0.080 to 0.2
0 to 0.12
Chromium (Cr), % 25 to 28
25 to 28
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 44.5 to 53.9
44.1 to 53.3
Manganese (Mn), % 1.0 to 2.5
1.0 to 2.5
Molybdenum (Mo), % 0 to 0.75
0 to 0.75
Nickel (Ni), % 20 to 22.5
20 to 22
Niobium (Nb), % 0
0.7 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030