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ASTM A204 Steel vs. EN-MC65120 Magnesium

ASTM A204 steel belongs to the iron alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys. 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 ASTM A204 steel and the bottom bar is EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
55
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 18 to 22
3.1
Fatigue Strength, MPa 200 to 220
80
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
17
Shear Strength, MPa 330 to 360
92
Tensile Strength: Ultimate (UTS), MPa 520 to 590
160
Tensile Strength: Yield (Proof), MPa 290 to 330
110

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1470
590
Melting Onset (Solidus), °C 1420 to 1430
520
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 52
100
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
120

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
25
Density, g/cm3 7.9
1.9
Embodied Carbon, kg CO2/kg material 1.5
25
Embodied Energy, MJ/kg 20
190
Embodied Water, L/kg 47
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 95
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 290
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
62
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
34
Thermal Diffusivity, mm2/s 14
56
Thermal Shock Resistance, points 15 to 17
9.8