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707.0 Aluminum vs. SAE-AISI 4130 Steel

707.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 4130 steel belongs to the iron alloys. There are 29 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 707.0 aluminum and the bottom bar is SAE-AISI 4130 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 1.7 to 3.4
13 to 26
Fatigue Strength, MPa 75 to 140
320 to 660
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 270 to 300
530 to 1040
Tensile Strength: Yield (Proof), MPa 170 to 250
440 to 980

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 180
420
Melting Completion (Liquidus), °C 630
1460
Melting Onset (Solidus), °C 600
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
43
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1140
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.3 to 8.6
83 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 430
500 to 2550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 26 to 29
19 to 37
Strength to Weight: Bending, points 32 to 34
19 to 29
Thermal Diffusivity, mm2/s 58
12
Thermal Shock Resistance, points 12 to 13
16 to 31

Alloy Composition

Aluminum (Al), % 90.5 to 93.6
0
Carbon (C), % 0
0.28 to 0.33
Chromium (Cr), % 0.2 to 0.4
0.8 to 1.1
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.8
97.3 to 98.2
Magnesium (Mg), % 1.8 to 2.4
0
Manganese (Mn), % 0.4 to 0.6
0.4 to 0.6
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 4.5
0
Residuals, % 0 to 0.15
0