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ISO-WD32250 Magnesium vs. AISI 334 Stainless Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while AISI 334 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 ISO-WD32250 magnesium and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.5 to 8.6
34
Fatigue Strength, MPa 170 to 210
150
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 180 to 190
360
Tensile Strength: Ultimate (UTS), MPa 310 to 330
540
Tensile Strength: Yield (Proof), MPa 240 to 290
190

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 120
1000
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 550
1370
Specific Heat Capacity, J/kg-K 980
480
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 13
22
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 24
4.1
Embodied Energy, MJ/kg 160
59
Embodied Water, L/kg 950
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
140
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
96
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
25
Strength to Weight: Axial, points 49 to 51
19
Strength to Weight: Bending, points 58 to 60
19
Thermal Shock Resistance, points 19 to 20
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 0
55.7 to 62.7
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
19 to 21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0