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EN-MC65220 Magnesium vs. ASTM A231 Spring Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while ASTM A231 spring steel belongs to the iron alloys. There are 29 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-MC65220 magnesium and the bottom bar is ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
540
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
14
Fatigue Strength, MPa 110
1000
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 150
1080
Tensile Strength: Ultimate (UTS), MPa 270
1790
Tensile Strength: Yield (Proof), MPa 200
1570

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 160
420
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 110
52
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.3
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
2.0
Embodied Energy, MJ/kg 210
28

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
230
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 40
64
Strength to Weight: Bending, points 49
42
Thermal Diffusivity, mm2/s 61
14
Thermal Shock Resistance, points 17
53

Alloy Composition


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Carbon (C), % 0
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
96.7 to 97.7
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.7 to 0.9
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0.15 to 0.35
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
0.15 to 0.3
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0