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Grade 200 Maraging Steel vs. 7175 Aluminum

Grade 200 maraging steel belongs to the iron alloys classification, while 7175 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 7175 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
88 to 91.4
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
1.2 to 2.0
Iron (Fe), % 67.8 to 71.8
0 to 0.2
Magnesium (Mg), % 0
2.1 to 2.9
Manganese (Mn), % 0 to 0.1
0 to 0.1
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 0.15
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.15 to 0.25
0 to 0.1
Zinc (Zn), % 0
5.1 to 6.1
Zirconium (Zr), % 0 to 0.020
0
Residuals, % 0
0 to 0.15