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7175 Aluminum vs. ASTM B817 Type II

7175 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 (6, in this case) are not shown.

For each property being compared, the top bar is 7175 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, % 3.8 to 5.9
3.0 to 13
Fatigue Strength, MPa 150 to 180
390 to 530
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 520 to 570
900 to 960
Tensile Strength: Yield (Proof), MPa 430 to 490
780 to 900

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 180
350
Melting Completion (Liquidus), °C 640
1580
Melting Onset (Solidus), °C 480
1530
Specific Heat Capacity, J/kg-K 870
550
Thermal Expansion, µm/m-K 23
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
4.6
Embodied Carbon, kg CO2/kg material 8.2
40
Embodied Energy, MJ/kg 150
650
Embodied Water, L/kg 1130
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
26 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
2890 to 3890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
34
Strength to Weight: Axial, points 48 to 52
55 to 58
Strength to Weight: Bending, points 48 to 51
45 to 47
Thermal Shock Resistance, points 23 to 25
62 to 66

Alloy Composition


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Aluminum (Al), % 88 to 91.4
5.0 to 6.0
Carbon (C), % 0
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.2
0.35 to 1.0
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0
Nitrogen (N), % 0
0 to 0.040
Oxygen (O), % 0
0 to 0.3
Silicon (Si), % 0 to 0.15
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0 to 0.1
82.1 to 87.8
Vanadium (V), % 0
5.0 to 6.0
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0 to 0.4