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EQ21A Magnesium vs. AISI 304LN Stainless Steel

EQ21A magnesium belongs to the magnesium alloys classification, while AISI 304LN stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 EQ21A magnesium and the bottom bar is AISI 304LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
190 to 350
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 2.4
7.8 to 46
Fatigue Strength, MPa 110
200 to 440
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 150
400 to 680
Tensile Strength: Ultimate (UTS), MPa 250
580 to 1160
Tensile Strength: Yield (Proof), MPa 190
230 to 870

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 160
960
Melting Completion (Liquidus), °C 640
1420
Melting Onset (Solidus), °C 560
1380
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 80
16
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
3.1
Embodied Energy, MJ/kg 210
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
83 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 410
140 to 1900
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
25
Strength to Weight: Axial, points 37
21 to 41
Strength to Weight: Bending, points 47
20 to 31
Thermal Diffusivity, mm2/s 62
4.0
Thermal Shock Resistance, points 15
13 to 26

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
18 to 20
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0
65 to 73.9
Magnesium (Mg), % 93.9 to 96.8
0
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0 to 0.010
8.0 to 12
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.030
Unspecified Rare Earths, % 1.5 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0