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EN 1.4618 Stainless Steel vs. 705.0 Aluminum

EN 1.4618 stainless steel belongs to the iron alloys classification, while 705.0 aluminum belongs to the aluminum 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 1.4618 stainless steel and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
62 to 65
Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 51
8.4 to 10
Fatigue Strength, MPa 240 to 250
63 to 98
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 680 to 700
240 to 260
Tensile Strength: Yield (Proof), MPa 250 to 260
130

Thermal Properties

Latent Heat of Fusion, J/g 280
390
Maximum Temperature: Mechanical, °C 900
180
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1360
610
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.7
8.4
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 150
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
120 to 130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 24 to 25
24 to 26
Strength to Weight: Bending, points 22 to 23
31 to 32
Thermal Diffusivity, mm2/s 4.0
55
Thermal Shock Resistance, points 15 to 16
11

Alloy Composition

Aluminum (Al), % 0
92.3 to 98.6
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 16.5 to 18.5
0 to 0.4
Copper (Cu), % 1.0 to 2.5
0 to 0.2
Iron (Fe), % 62.7 to 72.5
0 to 0.8
Magnesium (Mg), % 0
1.4 to 1.8
Manganese (Mn), % 5.5 to 9.5
0 to 0.6
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 3.3
Residuals, % 0
0 to 0.15