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7076 Aluminum vs. ASTM A204 Steel

7076 aluminum belongs to the aluminum alloys classification, while ASTM A204 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 ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2
18 to 22
Fatigue Strength, MPa 170
200 to 220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 310
330 to 360
Tensile Strength: Ultimate (UTS), MPa 530
520 to 590
Tensile Strength: Yield (Proof), MPa 460
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 630
1470
Melting Onset (Solidus), °C 460
1420 to 1430
Specific Heat Capacity, J/kg-K 860
470
Thermal Conductivity, W/m-K 140
52
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1110
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 1510
220 to 290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 49
18 to 21
Strength to Weight: Bending, points 48
18 to 20
Thermal Diffusivity, mm2/s 54
14
Thermal Shock Resistance, points 23
15 to 17