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7178 Aluminum vs. Grade 300 Maraging Steel

7178 aluminum belongs to the aluminum alloys classification, while grade 300 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 7178 aluminum and the bottom bar is grade 300 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.5 to 12
6.5 to 18
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 27
75
Shear Strength, MPa 140 to 380
640 to 1190
Tensile Strength: Ultimate (UTS), MPa 240 to 640
1030 to 2030
Tensile Strength: Yield (Proof), MPa 120 to 560
760 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Melting Completion (Liquidus), °C 630
1480
Melting Onset (Solidus), °C 480
1430
Specific Heat Capacity, J/kg-K 860
450
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
34
Density, g/cm3 3.1
8.2
Embodied Carbon, kg CO2/kg material 8.2
5.1
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
130 to 170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 21 to 58
35 to 68
Strength to Weight: Bending, points 28 to 54
28 to 43
Thermal Shock Resistance, points 10 to 28
31 to 62

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
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), % 0.18 to 0.28
0
Cobalt (Co), % 0
8.5 to 9.5
Copper (Cu), % 1.6 to 2.4
0
Iron (Fe), % 0 to 0.5
65 to 68.4
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0
18 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.2
0.5 to 0.8
Zinc (Zn), % 6.3 to 7.3
0
Zirconium (Zr), % 0
0 to 0.020
Residuals, % 0 to 0.15
0

Comparable Variants