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ASTM Grade HN Steel vs. M1A Magnesium

ASTM grade HN steel belongs to the iron alloys classification, while M1A magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, 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 HN steel and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 9.0
5.5
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
18
Tensile Strength: Ultimate (UTS), MPa 500
230

Thermal Properties

Latent Heat of Fusion, J/g 310
350
Maximum Temperature: Mechanical, °C 1080
95
Melting Completion (Liquidus), °C 1400
610
Melting Onset (Solidus), °C 1350
580
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 13
150
Thermal Expansion, µm/m-K 16
26

Otherwise Unclassified Properties

Base Metal Price, % relative 26
12
Density, g/cm3 7.9
1.7
Embodied Carbon, kg CO2/kg material 4.6
24
Embodied Energy, MJ/kg 66
160
Embodied Water, L/kg 180
970

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 17
38
Strength to Weight: Bending, points 18
49
Thermal Diffusivity, mm2/s 3.5
88
Thermal Shock Resistance, points 11
13

Alloy Composition

Calcium (Ca), % 0
0 to 0.3
Carbon (C), % 0.2 to 0.5
0
Chromium (Cr), % 19 to 23
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 44.9 to 57.8
0
Magnesium (Mg), % 0
97.2 to 98.8
Manganese (Mn), % 0 to 2.0
1.2 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.1
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.3