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2095 Aluminum vs. SAE-AISI 5155 Steel

2095 aluminum belongs to the aluminum alloys classification, while SAE-AISI 5155 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2095 aluminum and the bottom bar is SAE-AISI 5155 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 8.5
21
Fatigue Strength, MPa 200
260
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 410
390
Tensile Strength: Ultimate (UTS), MPa 700
620
Tensile Strength: Yield (Proof), MPa 610
380

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 210
420
Melting Completion (Liquidus), °C 660
1450
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 130
49
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 31
2.1
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.6
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 1470
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
110
Resilience: Unit (Modulus of Resilience), kJ/m3 2640
380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 65
22
Strength to Weight: Bending, points 59
21
Thermal Diffusivity, mm2/s 49
13
Thermal Shock Resistance, points 31
20

Alloy Composition

Aluminum (Al), % 91.3 to 94.9
0
Carbon (C), % 0
0.51 to 0.59
Chromium (Cr), % 0
0.7 to 0.9
Copper (Cu), % 3.9 to 4.6
0
Iron (Fe), % 0 to 0.15
97.2 to 97.9
Lithium (Li), % 0.7 to 1.5
0
Magnesium (Mg), % 0.25 to 0.8
0
Manganese (Mn), % 0 to 0.25
0.7 to 0.9
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.12
0.15 to 0.35
Silver (Ag), % 0.25 to 0.6
0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.040 to 0.18
0
Residuals, % 0 to 0.15
0