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AM50A Magnesium vs. ASTM Grade HT Steel

AM50A magnesium belongs to the magnesium alloys classification, while ASTM grade HT steel belongs to the iron alloys. There are 30 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 AM50A magnesium and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
150
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
4.6
Fatigue Strength, MPa 70
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Tensile Strength: Ultimate (UTS), MPa 210
500
Tensile Strength: Yield (Proof), MPa 120
270

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 120
1010
Melting Completion (Liquidus), °C 620
1390
Melting Onset (Solidus), °C 570
1340
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 65
12
Thermal Expansion, µm/m-K 26
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 88
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
5.4
Embodied Energy, MJ/kg 160
76
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
19
Resilience: Unit (Modulus of Resilience), kJ/m3 150
180
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 35
18
Strength to Weight: Bending, points 47
18
Thermal Diffusivity, mm2/s 39
3.2
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 4.4 to 5.4
0
Carbon (C), % 0
0.35 to 0.75
Chromium (Cr), % 0
15 to 19
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0040
38.2 to 51.7
Magnesium (Mg), % 93.7 to 95.3
0
Manganese (Mn), % 0.26 to 0.6
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0020
33 to 37
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 2.5
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.22
0