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AISI 201LN Stainless Steel vs. A390.0 Aluminum

AISI 201LN stainless steel belongs to the iron alloys classification, while A390.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 201LN stainless steel and the bottom bar is A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 200
75
Elongation at Break, % 25 to 51
0.87 to 0.91
Fatigue Strength, MPa 340 to 540
70 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
28
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
190 to 290
Tensile Strength: Yield (Proof), MPa 350 to 770
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
640
Maximum Temperature: Mechanical, °C 880
170
Melting Completion (Liquidus), °C 1410
580
Melting Onset (Solidus), °C 1370
480
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 17
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
20
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
67

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.6
7.3
Embodied Energy, MJ/kg 38
140
Embodied Water, L/kg 140
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
240 to 580
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 27 to 38
19 to 30
Strength to Weight: Bending, points 24 to 30
27 to 36
Thermal Diffusivity, mm2/s 4.0
56
Thermal Shock Resistance, points 16 to 23
9.0 to 14

Alloy Composition

Aluminum (Al), % 0
75.3 to 79.6
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 17.5
0
Copper (Cu), % 0 to 1.0
4.0 to 5.0
Iron (Fe), % 67.9 to 73.5
0 to 0.5
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 6.4 to 7.5
0 to 0.1
Nickel (Ni), % 4.0 to 5.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
16 to 18
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2