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S15500 Stainless Steel vs. ZC63A Magnesium

S15500 stainless steel belongs to the iron alloys classification, while ZC63A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (6, 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 S15500 stainless steel and the bottom bar is ZC63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 290 to 430
60
Elastic (Young's, Tensile) Modulus, GPa 190
48
Elongation at Break, % 6.8 to 16
3.3
Fatigue Strength, MPa 350 to 650
94
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
19
Shear Strength, MPa 540 to 870
130
Tensile Strength: Ultimate (UTS), MPa 890 to 1490
220
Tensile Strength: Yield (Proof), MPa 590 to 1310
130

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 820
98
Melting Completion (Liquidus), °C 1430
550
Melting Onset (Solidus), °C 1380
470
Specific Heat Capacity, J/kg-K 480
950
Thermal Conductivity, W/m-K 17
120
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
32
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.8
2.1
Embodied Carbon, kg CO2/kg material 2.7
22
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
6.3
Resilience: Unit (Modulus of Resilience), kJ/m3 890 to 4460
190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
58
Strength to Weight: Axial, points 32 to 53
29
Strength to Weight: Bending, points 26 to 37
38
Thermal Diffusivity, mm2/s 4.6
58
Thermal Shock Resistance, points 30 to 50
12

Alloy Composition

Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 4.5
2.4 to 3.0
Iron (Fe), % 71.9 to 79.9
0
Magnesium (Mg), % 0
89.2 to 91.9
Manganese (Mn), % 0 to 1.0
0.25 to 0.75
Nickel (Ni), % 3.5 to 5.5
0 to 0.010
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
5.5 to 6.5
Residuals, % 0
0 to 0.3