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EN AC-21100 Aluminum vs. AWS E90C-B9

EN AC-21100 aluminum belongs to the aluminum alloys classification, while AWS E90C-B9 belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 EN AC-21100 aluminum and the bottom bar is AWS E90C-B9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
18
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
75
Tensile Strength: Ultimate (UTS), MPa 340 to 350
710
Tensile Strength: Yield (Proof), MPa 210 to 240
460

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Melting Completion (Liquidus), °C 670
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
25
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 11
7.0
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 1150
91

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
110
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
550
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
25
Strength to Weight: Bending, points 36 to 37
23
Thermal Diffusivity, mm2/s 48
6.9
Thermal Shock Resistance, points 15
20

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0 to 0.040
Carbon (C), % 0
0.080 to 0.13
Chromium (Cr), % 0
8.0 to 10.5
Copper (Cu), % 4.2 to 5.2
0 to 0.2
Iron (Fe), % 0 to 0.19
84.4 to 90.9
Manganese (Mn), % 0 to 0.55
0 to 1.2
Molybdenum (Mo), % 0
0.85 to 1.2
Nickel (Ni), % 0
0 to 0.8
Niobium (Nb), % 0
0.020 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.18
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0.15 to 0.3
0
Vanadium (V), % 0
0.15 to 0.3
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0
0 to 0.5