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EN-MC21210 Magnesium vs. AISI 204 Stainless Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while AISI 204 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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-MC21210 magnesium and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
210 to 330
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 14
23 to 39
Fatigue Strength, MPa 70
320 to 720
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 110
500 to 700
Tensile Strength: Ultimate (UTS), MPa 190
730 to 1100
Tensile Strength: Yield (Proof), MPa 90
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 100
850
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 570
1370
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.6
7.7
Embodied Carbon, kg CO2/kg material 24
2.4
Embodied Energy, MJ/kg 160
35
Embodied Water, L/kg 980
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 92
360 to 2940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 32
27 to 40
Strength to Weight: Bending, points 44
24 to 31
Thermal Diffusivity, mm2/s 76
4.1
Thermal Shock Resistance, points 11
16 to 24

Alloy Composition


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Aluminum (Al), % 1.6 to 2.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
69.6 to 76.4
Magnesium (Mg), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
7.0 to 9.0
Nickel (Ni), % 0 to 0.0020
1.5 to 3.0
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0