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SAE-AISI 1021 Steel vs. 2195 Aluminum

SAE-AISI 1021 steel belongs to the iron alloys classification, while 2195 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 SAE-AISI 1021 steel and the bottom bar is 2195 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 17 to 27
9.3
Fatigue Strength, MPa 190 to 300
190
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 310 to 320
350
Tensile Strength: Ultimate (UTS), MPa 480 to 530
590
Tensile Strength: Yield (Proof), MPa 260 to 450
560

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 400
210
Melting Completion (Liquidus), °C 1460
660
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 52
130
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
100

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
31
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 1.4
8.6
Embodied Energy, MJ/kg 18
160
Embodied Water, L/kg 46
1470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
54
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
2290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 17 to 19
55
Strength to Weight: Bending, points 17 to 18
53
Thermal Diffusivity, mm2/s 14
49
Thermal Shock Resistance, points 15 to 17
26

Alloy Composition

Aluminum (Al), % 0
91.9 to 94.9
Carbon (C), % 0.18 to 0.23
0
Copper (Cu), % 0
3.7 to 4.3
Iron (Fe), % 98.8 to 99.22
0 to 0.15
Lithium (Li), % 0
0.8 to 1.2
Magnesium (Mg), % 0
0.25 to 0.8
Manganese (Mn), % 0.6 to 0.9
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.12
Silver (Ag), % 0
0.25 to 0.6
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.080 to 0.16
Residuals, % 0
0 to 0.15