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AWS ERTi-1 vs. 8021 Aluminum

AWS ERTi-1 belongs to the titanium alloys classification, while 8021 aluminum belongs to the aluminum alloys.

For each property being compared, the top bar is AWS ERTi-1 and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 24
2.3
Fatigue Strength, MPa 120
61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Tensile Strength: Ultimate (UTS), MPa 240
160
Tensile Strength: Yield (Proof), MPa 170
130

Thermal Properties

Latent Heat of Fusion, J/g 420
400
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1670
650
Melting Onset (Solidus), °C 1620
640
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 21
220
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
56
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
180

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.0
Density, g/cm3 4.5
2.8
Embodied Carbon, kg CO2/kg material 31
8.1
Embodied Energy, MJ/kg 510
150
Embodied Water, L/kg 110
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 140
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
49
Strength to Weight: Axial, points 15
16
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 8.7
88
Thermal Shock Resistance, points 19
7.0

Alloy Composition

Aluminum (Al), % 0
98 to 98.8
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.080
1.2 to 1.7
Nitrogen (N), % 0 to 0.012
0
Oxygen (O), % 0.030 to 0.1
0
Silicon (Si), % 0
0 to 0.15
Titanium (Ti), % 99.773 to 99.97
0
Residuals, % 0
0 to 0.15