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7003 Aluminum vs. Grade 250 Maraging Steel

7003 aluminum belongs to the aluminum alloys classification, while grade 250 maraging steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, 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 7003 aluminum and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 11
7.3 to 17
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 26
75
Shear Strength, MPa 210 to 230
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 350 to 390
970 to 1800
Tensile Strength: Yield (Proof), MPa 300 to 310
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 380
270
Melting Completion (Liquidus), °C 630
1480
Melting Onset (Solidus), °C 510
1430
Specific Heat Capacity, J/kg-K 870
450
Thermal Expansion, µm/m-K 24
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
32
Density, g/cm3 2.9
8.2
Embodied Carbon, kg CO2/kg material 8.1
4.9
Embodied Energy, MJ/kg 150
65
Embodied Water, L/kg 1140
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 41
130 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
23
Strength to Weight: Axial, points 33 to 37
33 to 61
Strength to Weight: Bending, points 37 to 40
26 to 40
Thermal Shock Resistance, points 15 to 17
29 to 54

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.2
0
Cobalt (Co), % 0
7.0 to 8.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.35
66.3 to 71.1
Magnesium (Mg), % 0.5 to 1.0
0
Manganese (Mn), % 0 to 0.3
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.2
0.3 to 0.5
Zinc (Zn), % 5.0 to 6.5
0
Zirconium (Zr), % 0.050 to 0.25
0 to 0.020
Residuals, % 0 to 0.15
0