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AZ61A Magnesium vs. ASTM Grade HD Steel

AZ61A magnesium belongs to the magnesium alloys classification, while ASTM grade HD 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 HD steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
9.1
Fatigue Strength, MPa 130
140
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
80
Tensile Strength: Ultimate (UTS), MPa 280
590
Tensile Strength: Yield (Proof), MPa 170
270

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
16
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 62
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
17
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 23
3.1
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 980
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
44
Resilience: Unit (Modulus of Resilience), kJ/m3 310
180
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 69
26
Strength to Weight: Axial, points 46
21
Strength to Weight: Bending, points 56
20
Thermal Diffusivity, mm2/s 47
4.3
Thermal Shock Resistance, points 17
19

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
58.4 to 70
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0050
4.0 to 7.0
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