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AISI 204 Stainless Steel vs. AM50A Magnesium

AISI 204 stainless steel belongs to the iron alloys classification, while AM50A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 204 stainless steel and the bottom bar is AM50A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
58
Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 23 to 39
11
Fatigue Strength, MPa 320 to 720
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 500 to 700
120
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
210
Tensile Strength: Yield (Proof), MPa 380 to 1080
120

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 850
120
Melting Completion (Liquidus), °C 1410
620
Melting Onset (Solidus), °C 1370
570
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 15
65
Thermal Expansion, µm/m-K 17
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
16
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
88

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.4
23
Embodied Energy, MJ/kg 35
160
Embodied Water, L/kg 130
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
19
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
150
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 27 to 40
35
Strength to Weight: Bending, points 24 to 31
47
Thermal Diffusivity, mm2/s 4.1
39
Thermal Shock Resistance, points 16 to 24
13

Alloy Composition

Aluminum (Al), % 0
4.4 to 5.4
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 69.6 to 76.4
0 to 0.0040
Magnesium (Mg), % 0
93.7 to 95.3
Manganese (Mn), % 7.0 to 9.0
0.26 to 0.6
Nickel (Ni), % 1.5 to 3.0
0 to 0.0020
Nitrogen (N), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.22