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AISI 347 Stainless Steel vs. 384.0 Aluminum

AISI 347 stainless steel belongs to the iron alloys classification, while 384.0 aluminum belongs to the aluminum alloys. There are 31 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 347 stainless steel and the bottom bar is 384.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 210
85
Elastic (Young's, Tensile) Modulus, GPa 200
74
Elongation at Break, % 34 to 46
2.5
Fatigue Strength, MPa 220 to 270
140
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
28
Shear Strength, MPa 430 to 460
200
Tensile Strength: Ultimate (UTS), MPa 610 to 690
330
Tensile Strength: Yield (Proof), MPa 240 to 350
170

Thermal Properties

Latent Heat of Fusion, J/g 290
550
Maximum Temperature: Mechanical, °C 870
170
Melting Completion (Liquidus), °C 1430
580
Melting Onset (Solidus), °C 1400
530
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
96
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
22
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
69

Otherwise Unclassified Properties

Base Metal Price, % relative 19
11
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 3.6
7.4
Embodied Energy, MJ/kg 52
140
Embodied Water, L/kg 150
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 220
6.9
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 310
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 22 to 25
32
Strength to Weight: Bending, points 20 to 22
37
Thermal Diffusivity, mm2/s 4.3
39
Thermal Shock Resistance, points 13 to 15
15

Alloy Composition

Aluminum (Al), % 0
77.3 to 86.5
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
3.0 to 4.5
Iron (Fe), % 64.1 to 74
0 to 1.3
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 2.0
0 to 0.5
Nickel (Ni), % 9.0 to 13
0 to 0.5
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
10.5 to 12
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.35
Zinc (Zn), % 0
0 to 3.0
Residuals, % 0
0 to 0.5