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EN 1.4901 Stainless Steel vs. EQ21A Magnesium

EN 1.4901 stainless steel belongs to the iron alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 29 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 EN 1.4901 stainless steel and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 19
2.4
Fatigue Strength, MPa 310
110
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 460
150
Tensile Strength: Ultimate (UTS), MPa 740
250
Tensile Strength: Yield (Proof), MPa 490
190

Thermal Properties

Latent Heat of Fusion, J/g 260
340
Maximum Temperature: Mechanical, °C 650
160
Melting Completion (Liquidus), °C 1490
640
Melting Onset (Solidus), °C 1450
560
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 26
110
Thermal Expansion, µm/m-K 12
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 11
80
Density, g/cm3 7.9
1.9
Embodied Carbon, kg CO2/kg material 2.8
27
Embodied Energy, MJ/kg 40
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 620
410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
63
Strength to Weight: Axial, points 26
37
Strength to Weight: Bending, points 23
47
Thermal Diffusivity, mm2/s 6.9
62
Thermal Shock Resistance, points 23
15

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
0
Chromium (Cr), % 8.5 to 9.5
0
Copper (Cu), % 0
0.050 to 0.1
Iron (Fe), % 85.8 to 89.1
0
Magnesium (Mg), % 0
93.9 to 96.8
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.3 to 0.6
0
Nickel (Ni), % 0 to 0.4
0 to 0.010
Niobium (Nb), % 0.040 to 0.090
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
1.3 to 1.7
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.0
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Vanadium (V), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0.4 to 1.0
Residuals, % 0
0 to 0.3