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7175 Aluminum vs. Grade 200 Maraging Steel

7175 aluminum belongs to the aluminum alloys classification, while grade 200 maraging steel belongs to the iron 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 7175 aluminum and the bottom bar is grade 200 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 3.8 to 5.9
9.1 to 18
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 26
74
Shear Strength, MPa 290 to 330
600 to 890
Tensile Strength: Ultimate (UTS), MPa 520 to 570
970 to 1500
Tensile Strength: Yield (Proof), MPa 430 to 490
690 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 380
260
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1420
Specific Heat Capacity, J/kg-K 870
460
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
31
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 8.2
4.5
Embodied Energy, MJ/kg 150
59
Embodied Water, L/kg 1130
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
1240 to 5740
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
23
Strength to Weight: Axial, points 48 to 52
33 to 51
Strength to Weight: Bending, points 48 to 51
27 to 35
Thermal Shock Resistance, points 23 to 25
29 to 45

Alloy Composition

Aluminum (Al), % 88 to 91.4
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
8.0 to 9.0
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.2
67.8 to 71.8
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0 to 0.1
Molybdenum (Mo), % 0
3.0 to 3.5
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.15
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.1
0.15 to 0.25
Zinc (Zn), % 5.1 to 6.1
0
Zirconium (Zr), % 0
0 to 0.020
Residuals, % 0 to 0.15
0