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Grade 200 Maraging Steel vs. 7178 Aluminum

Grade 200 maraging steel belongs to the iron alloys classification, while 7178 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 grade 200 maraging steel and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 9.1 to 18
4.5 to 12
Poisson's Ratio 0.3
0.32
Shear Modulus, GPa 74
27
Shear Strength, MPa 600 to 890
140 to 380
Tensile Strength: Ultimate (UTS), MPa 970 to 1500
240 to 640
Tensile Strength: Yield (Proof), MPa 690 to 1490
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 260
370
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1420
480
Specific Heat Capacity, J/kg-K 460
860
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Base Metal Price, % relative 31
10
Density, g/cm3 8.2
3.1
Embodied Carbon, kg CO2/kg material 4.5
8.2
Embodied Energy, MJ/kg 59
150
Embodied Water, L/kg 140
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 1240 to 5740
110 to 2220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
45
Strength to Weight: Axial, points 33 to 51
21 to 58
Strength to Weight: Bending, points 27 to 35
28 to 54
Thermal Shock Resistance, points 29 to 45
10 to 28

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
85.4 to 89.5
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 0
0.18 to 0.28
Cobalt (Co), % 8.0 to 9.0
0
Copper (Cu), % 0
1.6 to 2.4
Iron (Fe), % 67.8 to 71.8
0 to 0.5
Magnesium (Mg), % 0
2.4 to 3.1
Manganese (Mn), % 0 to 0.1
0 to 0.3
Molybdenum (Mo), % 3.0 to 3.5
0
Nickel (Ni), % 17 to 19
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 0.4
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.15 to 0.25
0 to 0.2
Zinc (Zn), % 0
6.3 to 7.3
Zirconium (Zr), % 0 to 0.020
0
Residuals, % 0
0 to 0.15

Comparable Variants