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Grade 300 Maraging Steel vs. 2218 Aluminum

Grade 300 maraging steel belongs to the iron alloys classification, while 2218 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, 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 300 maraging steel and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
73
Elongation at Break, % 6.5 to 18
6.8 to 10
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 75
27
Shear Strength, MPa 640 to 1190
210 to 250
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
330 to 430
Tensile Strength: Yield (Proof), MPa 760 to 1990
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Melting Completion (Liquidus), °C 1480
640
Melting Onset (Solidus), °C 1430
510
Specific Heat Capacity, J/kg-K 450
870
Thermal Expansion, µm/m-K 12
22

Otherwise Unclassified Properties

Base Metal Price, % relative 34
11
Density, g/cm3 8.2
3.1
Embodied Carbon, kg CO2/kg material 5.1
8.2
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 150
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
27 to 31
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
45
Strength to Weight: Axial, points 35 to 68
30 to 39
Strength to Weight: Bending, points 28 to 43
34 to 41
Thermal Shock Resistance, points 31 to 62
15 to 19

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
88.8 to 93.6
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 to 0.1
Cobalt (Co), % 8.5 to 9.5
0
Copper (Cu), % 0
3.5 to 4.5
Iron (Fe), % 65 to 68.4
0 to 1.0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 0.1
0 to 0.2
Molybdenum (Mo), % 4.6 to 5.2
0
Nickel (Ni), % 18 to 19
1.7 to 2.3
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 0.9
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.5 to 0.8
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0 to 0.020
0
Residuals, % 0
0 to 0.15