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AZ92A Magnesium vs. S31730 Stainless Steel

AZ92A magnesium belongs to the magnesium alloys classification, while S31730 stainless steel belongs to the iron alloys. There are 26 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 AZ92A magnesium and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 2.1 to 6.8
40
Fatigue Strength, MPa 76 to 90
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 97 to 160
370
Tensile Strength: Ultimate (UTS), MPa 170 to 270
540
Tensile Strength: Yield (Proof), MPa 83 to 140
200

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 130
990
Melting Completion (Liquidus), °C 590
1430
Melting Onset (Solidus), °C 440
1390
Specific Heat Capacity, J/kg-K 980
470
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.8
8.0
Embodied Carbon, kg CO2/kg material 22
4.6
Embodied Energy, MJ/kg 160
63
Embodied Water, L/kg 980
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 14
170
Resilience: Unit (Modulus of Resilience), kJ/m3 73 to 220
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
24
Strength to Weight: Axial, points 26 to 41
19
Strength to Weight: Bending, points 38 to 51
18
Thermal Shock Resistance, points 10 to 16
12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 0
52.4 to 61
Magnesium (Mg), % 86.7 to 90
0
Manganese (Mn), % 0.1 to 0.35
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.010
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 1.6 to 2.4
0
Residuals, % 0 to 0.3
0