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ASTM A204 Steel vs. 4007 Aluminum

ASTM A204 steel belongs to the iron alloys classification, while 4007 aluminum belongs to the aluminum 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 ASTM A204 steel and the bottom bar is 4007 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
32 to 44
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 18 to 22
5.1 to 23
Fatigue Strength, MPa 200 to 220
46 to 88
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 330 to 360
80 to 90
Tensile Strength: Ultimate (UTS), MPa 520 to 590
130 to 160
Tensile Strength: Yield (Proof), MPa 290 to 330
50 to 120

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1470
650
Melting Onset (Solidus), °C 1420 to 1430
590
Specific Heat Capacity, J/kg-K 470
890
Thermal Conductivity, W/m-K 52
170
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
42
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
140

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.9
2.8
Embodied Carbon, kg CO2/kg material 1.5
8.1
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 47
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 95
7.4 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 290
18 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 18 to 21
12 to 15
Strength to Weight: Bending, points 18 to 20
20 to 23
Thermal Diffusivity, mm2/s 14
67
Thermal Shock Resistance, points 15 to 17
5.5 to 6.7