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EN-MC21320 Magnesium vs. AISI 334 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AISI 334 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 EN-MC21320 magnesium and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
180
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
34
Fatigue Strength, MPa 95
150
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 130
360
Tensile Strength: Ultimate (UTS), MPa 230
540
Tensile Strength: Yield (Proof), MPa 140
190

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 110
1000
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 530
1370
Specific Heat Capacity, J/kg-K 1000
480
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 1.6
7.9
Embodied Carbon, kg CO2/kg material 23
4.1
Embodied Energy, MJ/kg 160
59
Embodied Water, L/kg 980
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
140
Resilience: Unit (Modulus of Resilience), kJ/m3 200
96
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 50
19
Thermal Shock Resistance, points 13
12

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0.15 to 0.6
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 20
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
55.7 to 62.7
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.0
Nickel (Ni), % 0 to 0.0020
19 to 21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0