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AISI 317 Stainless Steel vs. 4104 Aluminum

AISI 317 stainless steel belongs to the iron alloys classification, while 4104 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 317 stainless steel and the bottom bar is 4104 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 35 to 55
2.4
Fatigue Strength, MPa 250 to 330
42
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
27
Shear Strength, MPa 420 to 470
63
Tensile Strength: Ultimate (UTS), MPa 580 to 710
110
Tensile Strength: Yield (Proof), MPa 250 to 420
60

Thermal Properties

Latent Heat of Fusion, J/g 290
540
Maximum Temperature: Mechanical, °C 590
160
Melting Completion (Liquidus), °C 1400
600
Melting Onset (Solidus), °C 1380
560
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
33
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 21
9.5
Density, g/cm3 7.9
2.6
Embodied Carbon, kg CO2/kg material 4.3
8.0
Embodied Energy, MJ/kg 59
150
Embodied Water, L/kg 160
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210 to 260
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
25
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
54
Strength to Weight: Axial, points 20 to 25
12
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 4.1
58
Thermal Shock Resistance, points 12 to 15
5.1

Alloy Composition

Aluminum (Al), % 0
85.8 to 90
Bismuth (Bi), % 0
0.020 to 0.2
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 58 to 68
0 to 0.8
Magnesium (Mg), % 0
1.0 to 2.0
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 11 to 15
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
9.0 to 10.5
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15