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AISI 305 Stainless Steel vs. EZ33A Magnesium

AISI 305 stainless steel belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 31 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 AISI 305 stainless steel and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 220
55
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 34 to 45
2.6
Fatigue Strength, MPa 210 to 280
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 400 to 470
140
Tensile Strength: Ultimate (UTS), MPa 580 to 710
150
Tensile Strength: Yield (Proof), MPa 230 to 350
100

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 540
250
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 16
100
Thermal Expansion, µm/m-K 17
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
24
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 16
25
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 3.2
25
Embodied Energy, MJ/kg 45
190
Embodied Water, L/kg 150
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 210
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 320
120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 20 to 25
22
Strength to Weight: Bending, points 20 to 23
33
Thermal Diffusivity, mm2/s 4.2
54
Thermal Shock Resistance, points 13 to 15
9.2

Alloy Composition

Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 65.1 to 72.5
0
Magnesium (Mg), % 0
91.5 to 95
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 10.5 to 13
0 to 0.010
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.1
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3