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7021 Aluminum vs. AWS ERTi-1

7021 aluminum belongs to the aluminum alloys classification, while AWS ERTi-1 belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is AWS ERTi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 9.4
24
Fatigue Strength, MPa 150
120
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
41
Tensile Strength: Ultimate (UTS), MPa 460
240
Tensile Strength: Yield (Proof), MPa 390
170

Thermal Properties

Latent Heat of Fusion, J/g 380
420
Maximum Temperature: Mechanical, °C 200
320
Melting Completion (Liquidus), °C 630
1670
Melting Onset (Solidus), °C 510
1620
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 150
21
Thermal Expansion, µm/m-K 24
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
37
Density, g/cm3 2.9
4.5
Embodied Carbon, kg CO2/kg material 8.3
31
Embodied Energy, MJ/kg 150
510
Embodied Water, L/kg 1140
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
52
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 44
15
Strength to Weight: Bending, points 45
19
Thermal Diffusivity, mm2/s 59
8.7
Thermal Shock Resistance, points 20
19

Alloy Composition

Aluminum (Al), % 90.7 to 93.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 0.4
0 to 0.080
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.1
0
Nitrogen (N), % 0
0 to 0.012
Oxygen (O), % 0
0.030 to 0.1
Silicon (Si), % 0 to 0.25
0
Titanium (Ti), % 0 to 0.1
99.773 to 99.97
Zinc (Zn), % 5.0 to 6.0
0
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0