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ASTM Grade HL Steel vs. ZK40A Magnesium

ASTM grade HL steel belongs to the iron alloys classification, while ZK40A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 ZK40A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 11
4.2
Fatigue Strength, MPa 150
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
17
Tensile Strength: Ultimate (UTS), MPa 500
280
Tensile Strength: Yield (Proof), MPa 270
260

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 1100
120
Melting Completion (Liquidus), °C 1390
600
Melting Onset (Solidus), °C 1340
540
Specific Heat Capacity, J/kg-K 490
970
Thermal Expansion, µm/m-K 17
26

Otherwise Unclassified Properties

Base Metal Price, % relative 27
13
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 4.5
24
Embodied Energy, MJ/kg 65
160
Embodied Water, L/kg 210
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
12
Resilience: Unit (Modulus of Resilience), kJ/m3 180
740
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
65
Strength to Weight: Axial, points 18
43
Strength to Weight: Bending, points 18
53
Thermal Shock Resistance, points 11
17

Alloy Composition

Carbon (C), % 0.2 to 0.6
0
Chromium (Cr), % 28 to 32
0
Iron (Fe), % 40.8 to 53.8
0
Magnesium (Mg), % 0
94.2 to 96.1
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 18 to 22
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
3.5 to 4.5
Zirconium (Zr), % 0
0.45 to 1.0
Residuals, % 0
0 to 0.3