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2025 Aluminum vs. AWS BNi-5a

2025 aluminum belongs to the aluminum alloys classification, while AWS BNi-5a belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, 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 2025 aluminum and the bottom bar is AWS BNi-5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 400
480

Thermal Properties

Latent Heat of Fusion, J/g 400
420
Melting Completion (Liquidus), °C 640
1150
Melting Onset (Solidus), °C 520
1070
Specific Heat Capacity, J/kg-K 870
500
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
55
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 7.9
9.0
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1130
260

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 37
17
Strength to Weight: Bending, points 40
17
Thermal Shock Resistance, points 18
15

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0 to 0.050
Boron (B), % 0
1.0 to 1.5
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.1
18.5 to 19.5
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 3.9 to 5.0
0
Iron (Fe), % 0 to 1.0
0 to 0.5
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0
Nickel (Ni), % 0
70.1 to 73.5
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.5 to 1.2
7.0 to 7.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0 to 0.050
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5