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AZ91A Magnesium vs. Grade 250 Maraging Steel

AZ91A magnesium belongs to the magnesium alloys classification, while grade 250 maraging steel belongs to the iron alloys. There are 24 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 AZ91A magnesium and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 160
730 to 1660
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
75
Shear Strength, MPa 140
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 240
970 to 1800
Tensile Strength: Yield (Proof), MPa 160
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 470
1430
Specific Heat Capacity, J/kg-K 990
450
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 22
4.9
Embodied Energy, MJ/kg 160
65
Embodied Water, L/kg 990
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
130 to 150
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
33 to 61
Strength to Weight: Bending, points 49
26 to 40
Thermal Shock Resistance, points 14
29 to 54

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
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
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
66.3 to 71.1
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0 to 0.030
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
0 to 0.020