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7020 Aluminum vs. ASTM B817 Type II

7020 aluminum belongs to the aluminum alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is 7020 aluminum and the bottom bar is ASTM B817 type II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 8.4 to 14
3.0 to 13
Fatigue Strength, MPa 110 to 130
390 to 530
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 190 to 390
900 to 960
Tensile Strength: Yield (Proof), MPa 120 to 310
780 to 900

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 210
350
Melting Completion (Liquidus), °C 650
1580
Melting Onset (Solidus), °C 610
1530
Specific Heat Capacity, J/kg-K 880
550
Thermal Expansion, µm/m-K 23
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
37
Density, g/cm3 2.9
4.6
Embodied Carbon, kg CO2/kg material 8.3
40
Embodied Energy, MJ/kg 150
650
Embodied Water, L/kg 1150
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
26 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
2890 to 3890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
34
Strength to Weight: Axial, points 18 to 37
55 to 58
Strength to Weight: Bending, points 25 to 41
45 to 47
Thermal Shock Resistance, points 8.3 to 17
62 to 66

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
5.0 to 6.0
Carbon (C), % 0
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.4
0.35 to 1.0
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Nitrogen (N), % 0
0 to 0.040
Oxygen (O), % 0
0 to 0.3
Silicon (Si), % 0 to 0.35
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0 to 0.25
82.1 to 87.8
Vanadium (V), % 0
5.0 to 6.0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.4