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AWS ERNi-1 vs. AWS ERNiCu-7

Both AWS ERNi-1 and AWS ERNiCu-7 are nickel alloys. Both are furnished in the as-welded condition. They have 70% of their average alloy composition in common.

For each property being compared, the top bar is AWS ERNi-1 and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
160
Elongation at Break, % 22
34
Poisson's Ratio 0.31
0.32
Shear Modulus, GPa 69
61
Tensile Strength: Ultimate (UTS), MPa 470
550

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1360
1280
Melting Onset (Solidus), °C 1310
1240
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 73
20
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
3.2
Electrical Conductivity: Equal Weight (Specific), % IACS 19
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 60
50
Density, g/cm3 8.7
8.7
Embodied Carbon, kg CO2/kg material 11
8.5
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 230
250

Common Calculations

Stiffness to Weight: Axial, points 12
10
Stiffness to Weight: Bending, points 22
21
Strength to Weight: Axial, points 15
18
Strength to Weight: Bending, points 15
17
Thermal Diffusivity, mm2/s 19
5.3
Thermal Shock Resistance, points 17
19

Alloy Composition

Aluminum (Al), % 0 to 1.5
0 to 1.3
Carbon (C), % 0 to 0.15
0 to 0.15
Copper (Cu), % 0 to 0.25
18.3 to 36.5
Iron (Fe), % 0 to 1.0
0 to 2.5
Manganese (Mn), % 0 to 1.0
0 to 4.0
Nickel (Ni), % 93 to 98
62 to 69
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 1.3
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 2.0 to 3.5
1.5 to 3.0
Residuals, % 0
0 to 0.5