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SAE-AISI 1021 Steel vs. 850.0 Aluminum

SAE-AISI 1021 steel belongs to the iron alloys classification, while 850.0 aluminum belongs to the aluminum alloys. There are 31 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 SAE-AISI 1021 steel and the bottom bar is 850.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
45
Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 17 to 27
7.9
Fatigue Strength, MPa 190 to 300
59
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 310 to 320
100
Tensile Strength: Ultimate (UTS), MPa 480 to 530
140
Tensile Strength: Yield (Proof), MPa 260 to 450
76

Thermal Properties

Latent Heat of Fusion, J/g 250
380
Maximum Temperature: Mechanical, °C 400
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
370
Specific Heat Capacity, J/kg-K 470
850
Thermal Conductivity, W/m-K 52
180
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
47
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
140

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
14
Density, g/cm3 7.9
3.1
Embodied Carbon, kg CO2/kg material 1.4
8.5
Embodied Energy, MJ/kg 18
160
Embodied Water, L/kg 46
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
9.1
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
42
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 24
44
Strength to Weight: Axial, points 17 to 19
12
Strength to Weight: Bending, points 17 to 18
19
Thermal Diffusivity, mm2/s 14
69
Thermal Shock Resistance, points 15 to 17
6.1

Alloy Composition

Aluminum (Al), % 0
88.3 to 93.1
Carbon (C), % 0.18 to 0.23
0
Copper (Cu), % 0
0.7 to 1.3
Iron (Fe), % 98.8 to 99.22
0 to 0.7
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0.6 to 0.9
0 to 0.1
Nickel (Ni), % 0
0.7 to 1.3
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.7
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0
0 to 0.2
Residuals, % 0
0 to 0.3