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EN 1.3956 Stainless Steel vs. ZK61A Magnesium

EN 1.3956 stainless steel belongs to the iron alloys classification, while ZK61A 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 EN 1.3956 stainless steel and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 27
5.8 to 7.1
Fatigue Strength, MPa 240
120 to 140
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
18
Tensile Strength: Ultimate (UTS), MPa 650
290 to 310
Tensile Strength: Yield (Proof), MPa 330
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1080
120
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
530
Specific Heat Capacity, J/kg-K 480
960
Thermal Expansion, µm/m-K 13
27

Otherwise Unclassified Properties

Base Metal Price, % relative 22
13
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 4.8
23
Embodied Energy, MJ/kg 68
160
Embodied Water, L/kg 180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 270
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
62
Strength to Weight: Axial, points 23
42 to 45
Strength to Weight: Bending, points 21
50 to 53
Thermal Shock Resistance, points 18
17 to 18

Alloy Composition

Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 51.9 to 62.1
0
Magnesium (Mg), % 0
92.1 to 93.9
Manganese (Mn), % 4.0 to 6.0
0
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0 to 0.010
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3