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7076 Aluminum vs. SAE-AISI 94B17 Steel

7076 aluminum belongs to the aluminum alloys classification, while SAE-AISI 94B17 steel belongs to the iron alloys. 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 7076 aluminum and the bottom bar is SAE-AISI 94B17 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
130
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2
25
Fatigue Strength, MPa 170
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 310
280
Tensile Strength: Ultimate (UTS), MPa 530
440
Tensile Strength: Yield (Proof), MPa 460
270

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 630
1460
Melting Onset (Solidus), °C 460
1420
Specific Heat Capacity, J/kg-K 860
470
Thermal Conductivity, W/m-K 140
39
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1110
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
96
Resilience: Unit (Modulus of Resilience), kJ/m3 1510
200
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 49
16
Strength to Weight: Bending, points 48
16
Thermal Diffusivity, mm2/s 54
10
Thermal Shock Resistance, points 23
13

Alloy Composition

Aluminum (Al), % 86.9 to 91.2
0
Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0
0.15 to 0.2
Chromium (Cr), % 0
0.3 to 0.5
Copper (Cu), % 0.3 to 1.0
0
Iron (Fe), % 0 to 0.6
97.1 to 98.3
Magnesium (Mg), % 1.2 to 2.0
0
Manganese (Mn), % 0.3 to 0.8
0.75 to 1.0
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 0
0.3 to 0.6
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 7.0 to 8.0
0
Residuals, % 0 to 0.15
0