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EN 1.3975 Stainless Steel vs. ZK51A Magnesium

EN 1.3975 stainless steel belongs to the iron alloys classification, while ZK51A 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 EN 1.3975 stainless steel and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 27
4.7
Fatigue Strength, MPa 230
62
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Tensile Strength: Ultimate (UTS), MPa 660
240
Tensile Strength: Yield (Proof), MPa 320
150

Thermal Properties

Latent Heat of Fusion, J/g 340
340
Maximum Temperature: Mechanical, °C 910
120
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1320
550
Specific Heat Capacity, J/kg-K 500
970
Thermal Expansion, µm/m-K 16
26

Otherwise Unclassified Properties

Base Metal Price, % relative 15
13
Density, g/cm3 7.5
1.8
Embodied Carbon, kg CO2/kg material 3.3
24
Embodied Energy, MJ/kg 47
160
Embodied Water, L/kg 150
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
10
Resilience: Unit (Modulus of Resilience), kJ/m3 270
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
64
Strength to Weight: Axial, points 24
36
Strength to Weight: Bending, points 22
47
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 58.2 to 65.4
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 7.0 to 9.0
0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 8.0 to 9.0
0 to 0.010
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 3.5 to 4.5
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3