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EN-MC21320 Magnesium vs. AISI 304 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AISI 304 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
170 to 360
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
8.0 to 43
Fatigue Strength, MPa 95
210 to 440
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 130
400 to 690
Tensile Strength: Ultimate (UTS), MPa 230
580 to 1180
Tensile Strength: Yield (Proof), MPa 140
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 110
710
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 530
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
16
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
3.0
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 980
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 200
140 to 1870
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
21 to 42
Strength to Weight: Bending, points 50
20 to 32
Thermal Diffusivity, mm2/s 40
4.2
Thermal Shock Resistance, points 13
12 to 25

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
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
66.5 to 74
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 2.0
Nickel (Ni), % 0 to 0.0020
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.5 to 1.5
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0