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K1A Magnesium vs. Grade 250 Maraging Steel

K1A magnesium belongs to the magnesium alloys classification, while grade 250 maraging steel belongs to the iron 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 K1A magnesium and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 43
190
Elongation at Break, % 13
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 17
75
Shear Strength, MPa 55
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 180
970 to 1800
Tensile Strength: Yield (Proof), MPa 51
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Melting Completion (Liquidus), °C 650
1480
Melting Onset (Solidus), °C 650
1430
Specific Heat Capacity, J/kg-K 1000
450
Thermal Expansion, µm/m-K 27
12

Otherwise Unclassified Properties

Base Metal Price, % relative 13
32
Density, g/cm3 1.6
8.2
Embodied Carbon, kg CO2/kg material 24
4.9
Embodied Energy, MJ/kg 170
65
Embodied Water, L/kg 970
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
130 to 150
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 73
23
Strength to Weight: Axial, points 31
33 to 61
Strength to Weight: Bending, points 43
26 to 40
Thermal Shock Resistance, points 11
29 to 54

Alloy Composition


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Aluminum (Al), % 0
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
Cobalt (Co), % 0
7.0 to 8.5
Iron (Fe), % 0
66.3 to 71.1
Magnesium (Mg), % 98.7 to 99.6
0
Manganese (Mn), % 0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zirconium (Zr), % 0.4 to 1.0
0 to 0.020
Residuals, % 0 to 0.3
0