MakeItFrom.com
Menu (ESC)

3105 Aluminum vs. ACI-ASTM CG12 Steel

3105 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CG12 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 3105 aluminum and the bottom bar is ACI-ASTM CG12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 29 to 67
160
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 1.1 to 20
40
Fatigue Strength, MPa 39 to 95
190
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 120 to 240
550
Tensile Strength: Yield (Proof), MPa 46 to 220
220

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 180
1040
Melting Completion (Liquidus), °C 660
1410
Melting Onset (Solidus), °C 640
1370
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 24
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
18
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.2
3.3
Embodied Energy, MJ/kg 150
48
Embodied Water, L/kg 1180
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
180
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 24
20
Strength to Weight: Bending, points 20 to 31
19
Thermal Diffusivity, mm2/s 68
4.0
Thermal Shock Resistance, points 5.2 to 11
12

Alloy Composition

Aluminum (Al), % 96 to 99.5
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0 to 0.2
20 to 23
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
60.3 to 70
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
0 to 1.5
Nickel (Ni), % 0
10 to 13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0