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AISI 201LN Stainless Steel vs. 4045 Aluminum

AISI 201LN stainless steel belongs to the iron alloys classification, while 4045 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 AISI 201LN stainless steel and the bottom bar is 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 25 to 51
2.3
Fatigue Strength, MPa 340 to 540
45
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 530 to 680
69
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
120
Tensile Strength: Yield (Proof), MPa 350 to 770
64

Thermal Properties

Latent Heat of Fusion, J/g 280
540
Maximum Temperature: Mechanical, °C 880
160
Melting Completion (Liquidus), °C 1410
600
Melting Onset (Solidus), °C 1370
580
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
45
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
160

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.7
2.6
Embodied Carbon, kg CO2/kg material 2.6
7.8
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 140
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
54
Strength to Weight: Axial, points 27 to 38
13
Strength to Weight: Bending, points 24 to 30
21
Thermal Diffusivity, mm2/s 4.0
74
Thermal Shock Resistance, points 16 to 23
5.7

Alloy Composition

Aluminum (Al), % 0
87.4 to 91
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 17.5
0
Copper (Cu), % 0 to 1.0
0 to 0.3
Iron (Fe), % 67.9 to 73.5
0 to 0.8
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 6.4 to 7.5
0 to 0.050
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
9.0 to 11
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 0.15