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ASTM Grade HL Steel vs. AZ92A Magnesium

ASTM grade HL steel belongs to the iron alloys classification, while AZ92A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, 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 ASTM grade HL steel and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
47
Elongation at Break, % 11
2.1 to 6.8
Fatigue Strength, MPa 150
76 to 90
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 500
170 to 270
Tensile Strength: Yield (Proof), MPa 270
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Maximum Temperature: Mechanical, °C 1100
130
Melting Completion (Liquidus), °C 1390
590
Melting Onset (Solidus), °C 1340
440
Specific Heat Capacity, J/kg-K 490
980
Thermal Expansion, µm/m-K 17
26

Otherwise Unclassified Properties

Base Metal Price, % relative 27
12
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 4.5
22
Embodied Energy, MJ/kg 65
160
Embodied Water, L/kg 210
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 180
73 to 220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
67
Strength to Weight: Axial, points 18
26 to 41
Strength to Weight: Bending, points 18
38 to 51
Thermal Shock Resistance, points 11
10 to 16

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0.2 to 0.6
0
Chromium (Cr), % 28 to 32
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 40.8 to 53.8
0
Magnesium (Mg), % 0
86.7 to 90
Manganese (Mn), % 0 to 2.0
0.1 to 0.35
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 18 to 22
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.3
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
1.6 to 2.4
Residuals, % 0
0 to 0.3