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S17700 Stainless Steel vs. EN AC-44000 Aluminum

S17700 stainless steel belongs to the iron alloys classification, while EN AC-44000 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 S17700 stainless steel and the bottom bar is EN AC-44000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
51
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 1.0 to 23
7.3
Fatigue Strength, MPa 290 to 560
64
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
180
Tensile Strength: Yield (Proof), MPa 430 to 1210
86

Thermal Properties

Latent Heat of Fusion, J/g 290
560
Maximum Temperature: Mechanical, °C 890
170
Melting Completion (Liquidus), °C 1440
590
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 11
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
130

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.5
Embodied Carbon, kg CO2/kg material 2.8
7.8
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
11
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
51
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 25
55
Strength to Weight: Axial, points 42 to 59
20
Strength to Weight: Bending, points 32 to 40
28
Thermal Diffusivity, mm2/s 4.1
61
Thermal Shock Resistance, points 39 to 54
8.4

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
87.1 to 90
Carbon (C), % 0 to 0.090
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 70.5 to 76.8
0 to 0.19
Magnesium (Mg), % 0
0 to 0.45
Manganese (Mn), % 0 to 1.0
0 to 0.1
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
10 to 11.8
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1