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AWS E3155 vs. AWS E318

Both AWS E3155 and AWS E318 are iron alloys. Both are furnished in the as-welded condition. They have 66% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS E3155 and the bottom bar is AWS E318.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
29
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 770
620

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 70
23
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 7.7
4.4
Embodied Energy, MJ/kg 110
62
Embodied Water, L/kg 300
160

Common Calculations

PREN (Pitting Resistance) 35
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
22
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 3.3
4.0
Thermal Shock Resistance, points 20
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 20 to 22.5
17 to 20
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 23.3 to 36.3
57.6 to 69.5
Manganese (Mn), % 1.0 to 2.5
0.5 to 2.5
Molybdenum (Mo), % 2.5 to 3.5
2.0 to 3.0
Nickel (Ni), % 19 to 21
11 to 14
Niobium (Nb), % 0.75 to 1.3
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 2.0 to 3.0
0