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EN 1.4938 Stainless Steel vs. 850.0 Aluminum

EN 1.4938 stainless steel belongs to the iron alloys classification, while 850.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 1.4938 stainless steel and the bottom bar is 850.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 16 to 17
7.9
Fatigue Strength, MPa 390 to 520
59
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 540 to 630
100
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
140
Tensile Strength: Yield (Proof), MPa 640 to 870
76

Thermal Properties

Latent Heat of Fusion, J/g 270
380
Maximum Temperature: Mechanical, °C 750
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
370
Specific Heat Capacity, J/kg-K 470
850
Thermal Conductivity, W/m-K 30
180
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
47
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
140

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 3.3
8.5
Embodied Energy, MJ/kg 47
160
Embodied Water, L/kg 110
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
9.1
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
42
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
44
Strength to Weight: Axial, points 31 to 37
12
Strength to Weight: Bending, points 26 to 29
19
Thermal Diffusivity, mm2/s 8.1
69
Thermal Shock Resistance, points 30 to 35
6.1

Alloy Composition

Aluminum (Al), % 0
88.3 to 93.1
Carbon (C), % 0.080 to 0.15
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 0
0.7 to 1.3
Iron (Fe), % 80.5 to 84.8
0 to 0.7
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0.4 to 0.9
0 to 0.1
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
0.7 to 1.3
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0.25 to 0.4
0
Residuals, % 0
0 to 0.3