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AWS E3155 vs. Grade N7M Nickel

AWS E3155 belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS E3155 and the bottom bar is grade N7M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 23
22
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 770
590

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1460
1650
Melting Onset (Solidus), °C 1410
1590
Specific Heat Capacity, J/kg-K 450
390
Thermal Expansion, µm/m-K 13
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
75
Density, g/cm3 8.4
9.3
Embodied Carbon, kg CO2/kg material 7.7
16
Embodied Energy, MJ/kg 110
200
Embodied Water, L/kg 300
270

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 22
17
Thermal Shock Resistance, points 20
19

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.070
Chromium (Cr), % 20 to 22.5
0 to 1.0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 23.3 to 36.3
0 to 3.0
Manganese (Mn), % 1.0 to 2.5
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
30 to 33
Nickel (Ni), % 19 to 21
60.9 to 70
Niobium (Nb), % 0.75 to 1.3
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