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AZ61A Magnesium vs. ASTM Grade HC Steel

AZ61A magnesium belongs to the magnesium alloys classification, while ASTM grade HC steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 AZ61A magnesium and the bottom bar is ASTM grade HC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
6.0
Fatigue Strength, MPa 130
96
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
80
Tensile Strength: Ultimate (UTS), MPa 280
430
Tensile Strength: Yield (Proof), MPa 170
200

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 530
1370
Specific Heat Capacity, J/kg-K 990
490
Thermal Conductivity, W/m-K 79
17
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 62
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
14
Density, g/cm3 1.7
7.6
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
40
Embodied Water, L/kg 980
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
21
Resilience: Unit (Modulus of Resilience), kJ/m3 310
95
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 69
26
Strength to Weight: Axial, points 46
16
Strength to Weight: Bending, points 56
16
Thermal Diffusivity, mm2/s 47
4.5
Thermal Shock Resistance, points 17
14

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0 to 0.5
Chromium (Cr), % 0
26 to 30
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
61.9 to 74
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0050
0 to 4.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0