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ASTM Grade HP Steel vs. EN-MC21220 Magnesium

ASTM grade HP steel belongs to the iron alloys classification, while EN-MC21220 magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 HP steel and the bottom bar is EN-MC21220 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
58
Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 5.1
11
Fatigue Strength, MPa 130
89
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
17
Tensile Strength: Ultimate (UTS), MPa 490
210
Tensile Strength: Yield (Proof), MPa 260
120

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Maximum Temperature: Mechanical, °C 1100
120
Melting Completion (Liquidus), °C 1370
600
Melting Onset (Solidus), °C 1330
540
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 12
65
Thermal Expansion, µm/m-K 16
27

Otherwise Unclassified Properties

Base Metal Price, % relative 34
12
Density, g/cm3 7.9
1.7
Embodied Carbon, kg CO2/kg material 5.8
23
Embodied Energy, MJ/kg 82
160
Embodied Water, L/kg 220
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
20
Resilience: Unit (Modulus of Resilience), kJ/m3 170
160
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 17
34
Strength to Weight: Bending, points 17
46
Thermal Diffusivity, mm2/s 3.2
39
Thermal Shock Resistance, points 11
12

Alloy Composition

Aluminum (Al), % 0
4.4 to 5.5
Carbon (C), % 0.35 to 0.75
0
Chromium (Cr), % 24 to 28
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 29.2 to 42.7
0 to 0.0050
Magnesium (Mg), % 0
93.5 to 95.5
Manganese (Mn), % 0 to 2.0
0.1 to 0.6
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.5
0 to 0.1
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.010