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EN 1.4477 Stainless Steel vs. 238.0 Aluminum

EN 1.4477 stainless steel belongs to the iron alloys classification, while 238.0 aluminum belongs to the aluminum alloys. There are 29 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 EN 1.4477 stainless steel and the bottom bar is 238.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
76
Elongation at Break, % 22 to 23
1.5
Fatigue Strength, MPa 420 to 490
110
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 81
28
Tensile Strength: Ultimate (UTS), MPa 880 to 930
210
Tensile Strength: Yield (Proof), MPa 620 to 730
170

Thermal Properties

Latent Heat of Fusion, J/g 300
430
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1430
600
Melting Onset (Solidus), °C 1380
510
Specific Heat Capacity, J/kg-K 480
840
Thermal Conductivity, W/m-K 13
100
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
67

Otherwise Unclassified Properties

Base Metal Price, % relative 20
12
Density, g/cm3 7.7
3.4
Embodied Carbon, kg CO2/kg material 3.7
7.4
Embodied Energy, MJ/kg 52
140
Embodied Water, L/kg 190
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180 to 190
2.9
Resilience: Unit (Modulus of Resilience), kJ/m3 940 to 1290
180
Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 25
42
Strength to Weight: Axial, points 31 to 33
17
Strength to Weight: Bending, points 26 to 27
23
Thermal Diffusivity, mm2/s 3.5
37
Thermal Shock Resistance, points 23 to 25
9.1

Alloy Composition

Aluminum (Al), % 0
81.9 to 84.9
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.8
9.5 to 10.5
Iron (Fe), % 56.6 to 63.6
1.0 to 1.5
Magnesium (Mg), % 0
0 to 0.25
Manganese (Mn), % 0.8 to 1.5
0
Molybdenum (Mo), % 1.5 to 2.6
0
Nickel (Ni), % 5.8 to 7.5
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
3.6 to 4.4
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
1.0 to 1.5