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EN 1.4911 Stainless Steel vs. ZK51A Magnesium

EN 1.4911 stainless steel belongs to the iron alloys classification, while ZK51A magnesium belongs to the magnesium 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 EN 1.4911 stainless steel and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 11
4.7
Fatigue Strength, MPa 530
62
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Shear Strength, MPa 640
160
Tensile Strength: Ultimate (UTS), MPa 1070
240
Tensile Strength: Yield (Proof), MPa 970
150

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Maximum Temperature: Mechanical, °C 700
120
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 20
110
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
28
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
140

Otherwise Unclassified Properties

Base Metal Price, % relative 20
13
Density, g/cm3 7.9
1.8
Embodied Carbon, kg CO2/kg material 3.4
24
Embodied Energy, MJ/kg 49
160
Embodied Water, L/kg 130
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
10
Resilience: Unit (Modulus of Resilience), kJ/m3 2410
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
64
Strength to Weight: Axial, points 38
36
Strength to Weight: Bending, points 30
47
Thermal Diffusivity, mm2/s 5.4
61
Thermal Shock Resistance, points 37
15

Alloy Composition

Boron (B), % 0.0050 to 0.015
0
Carbon (C), % 0.050 to 0.12
0
Chromium (Cr), % 9.8 to 11.2
0
Cobalt (Co), % 5.0 to 7.0
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 75.7 to 83.8
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0.3 to 1.3
0
Molybdenum (Mo), % 0.5 to 1.0
0
Nickel (Ni), % 0.2 to 1.2
0 to 0.010
Niobium (Nb), % 0.2 to 0.5
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.1 to 0.8
0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 0 to 0.7
0
Vanadium (V), % 0.1 to 0.4
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3