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705.0 Aluminum vs. EN 1.4971 Stainless Steel

705.0 aluminum belongs to the aluminum alloys classification, while EN 1.4971 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 705.0 aluminum and the bottom bar is EN 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62 to 65
240
Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 8.4 to 10
34
Fatigue Strength, MPa 63 to 98
270
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 240 to 260
800
Tensile Strength: Yield (Proof), MPa 130
340

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 180
1100
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 610
1410
Specific Heat Capacity, J/kg-K 890
450
Thermal Conductivity, W/m-K 140
13
Thermal Expansion, µm/m-K 24
15

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
70
Density, g/cm3 2.8
8.4
Embodied Carbon, kg CO2/kg material 8.4
7.6
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1170
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
220
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 24 to 26
26
Strength to Weight: Bending, points 31 to 32
23
Thermal Diffusivity, mm2/s 55
3.4
Thermal Shock Resistance, points 11
19

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0 to 0.4
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.8
24.3 to 37.1
Magnesium (Mg), % 1.4 to 1.8
0
Manganese (Mn), % 0 to 0.6
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 3.3
0
Residuals, % 0 to 0.15
0