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AWS ERTi-7 vs. 7021 Aluminum

AWS ERTi-7 belongs to the titanium alloys classification, while 7021 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
69
Elongation at Break, % 20
9.4
Fatigue Strength, MPa 190
150
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
26
Tensile Strength: Ultimate (UTS), MPa 340
460
Tensile Strength: Yield (Proof), MPa 280
390

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
38
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
120

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.9
Embodied Carbon, kg CO2/kg material 47
8.3
Embodied Energy, MJ/kg 800
150
Embodied Water, L/kg 470
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
41
Resilience: Unit (Modulus of Resilience), kJ/m3 360
1110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 21
44
Strength to Weight: Bending, points 24
45
Thermal Diffusivity, mm2/s 8.8
59
Thermal Shock Resistance, points 26
20

Alloy Composition

Aluminum (Al), % 0
90.7 to 93.7
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
0 to 0.4
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Palladium (Pd), % 0.12 to 0.25
0
Silicon (Si), % 0
0 to 0.25
Titanium (Ti), % 99.417 to 99.8
0 to 0.1
Zinc (Zn), % 0
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15