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7003 Aluminum vs. AWS ERNi-1

7003 aluminum belongs to the aluminum alloys classification, while AWS ERNi-1 belongs to the nickel alloys. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7003 aluminum and the bottom bar is AWS ERNi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
180
Elongation at Break, % 11
22
Poisson's Ratio 0.32
0.31
Shear Modulus, GPa 26
69
Tensile Strength: Ultimate (UTS), MPa 350 to 390
470

Thermal Properties

Latent Heat of Fusion, J/g 380
300
Melting Completion (Liquidus), °C 630
1360
Melting Onset (Solidus), °C 510
1310
Specific Heat Capacity, J/kg-K 870
450
Thermal Conductivity, W/m-K 150
73
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
19
Electrical Conductivity: Equal Weight (Specific), % IACS 110
19

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
60
Density, g/cm3 2.9
8.7
Embodied Carbon, kg CO2/kg material 8.1
11
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
230

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 47
22
Strength to Weight: Axial, points 33 to 37
15
Strength to Weight: Bending, points 37 to 40
15
Thermal Diffusivity, mm2/s 59
19
Thermal Shock Resistance, points 15 to 17
17

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
0 to 1.5
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.2
0 to 0.25
Iron (Fe), % 0 to 0.35
0 to 1.0
Magnesium (Mg), % 0.5 to 1.0
0
Manganese (Mn), % 0 to 0.3
0 to 1.0
Nickel (Ni), % 0
93 to 98
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.3
0 to 0.75
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
2.0 to 3.5
Zinc (Zn), % 5.0 to 6.5
0
Zirconium (Zr), % 0.050 to 0.25
0
Residuals, % 0
0 to 0.5