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238.0 Aluminum vs. AWS ERTi-12

238.0 aluminum belongs to the aluminum alloys classification, while AWS ERTi-12 belongs to the titanium alloys.

For each property being compared, the top bar is 238.0 aluminum and the bottom bar is AWS ERTi-12.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
110
Elongation at Break, % 1.5
12
Fatigue Strength, MPa 110
200
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 28
41
Tensile Strength: Ultimate (UTS), MPa 210
480
Tensile Strength: Yield (Proof), MPa 170
340

Thermal Properties

Latent Heat of Fusion, J/g 430
420
Maximum Temperature: Mechanical, °C 170
320
Melting Completion (Liquidus), °C 600
1670
Melting Onset (Solidus), °C 510
1620
Specific Heat Capacity, J/kg-K 840
540
Thermal Conductivity, W/m-K 100
21
Thermal Expansion, µm/m-K 21
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 67
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 3.4
4.5
Embodied Carbon, kg CO2/kg material 7.4
31
Embodied Energy, MJ/kg 140
510
Embodied Water, L/kg 1040
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
52
Resilience: Unit (Modulus of Resilience), kJ/m3 180
550
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
35
Strength to Weight: Axial, points 17
30
Strength to Weight: Bending, points 23
30
Thermal Diffusivity, mm2/s 37
8.7
Thermal Shock Resistance, points 9.1
37

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.030
Copper (Cu), % 9.5 to 10.5
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 1.0 to 1.5
0 to 0.15
Magnesium (Mg), % 0 to 0.25
0
Molybdenum (Mo), % 0
0.2 to 0.4
Nickel (Ni), % 0
0.060 to 0.090
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Silicon (Si), % 3.6 to 4.4
0
Titanium (Ti), % 0
99.147 to 99.66
Zinc (Zn), % 1.0 to 1.5
0