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EN AC-21100 Aluminum vs. AISI 316H Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while AISI 316H stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 EN AC-21100 aluminum and the bottom bar is AISI 316H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
190
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 6.2 to 7.3
40
Fatigue Strength, MPa 79 to 87
200
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Tensile Strength: Ultimate (UTS), MPa 340 to 350
580
Tensile Strength: Yield (Proof), MPa 210 to 240
230

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 170
940
Melting Completion (Liquidus), °C 670
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
3.9
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
190
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
21
Strength to Weight: Bending, points 36 to 37
20
Thermal Diffusivity, mm2/s 48
4.2
Thermal Shock Resistance, points 15
13

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
62.1 to 72
Manganese (Mn), % 0 to 0.55
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
10 to 14
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.18
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0