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EN 1.4945 Stainless Steel vs. 4047 Aluminum

EN 1.4945 stainless steel belongs to the iron alloys classification, while 4047 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 EN 1.4945 stainless steel and the bottom bar is 4047 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 19 to 34
3.4
Fatigue Strength, MPa 230 to 350
45
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 430 to 460
69
Tensile Strength: Ultimate (UTS), MPa 640 to 740
120
Tensile Strength: Yield (Proof), MPa 290 to 550
64

Thermal Properties

Latent Heat of Fusion, J/g 290
570
Maximum Temperature: Mechanical, °C 920
160
Melting Completion (Liquidus), °C 1490
580
Melting Onset (Solidus), °C 1440
580
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 14
130
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
33
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
120

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.5
Density, g/cm3 8.1
2.5
Embodied Carbon, kg CO2/kg material 5.0
7.7
Embodied Energy, MJ/kg 73
140
Embodied Water, L/kg 150
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
3.5
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
28
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 24
55
Strength to Weight: Axial, points 22 to 25
13
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 3.7
59
Thermal Shock Resistance, points 14 to 16
5.6

Alloy Composition

Aluminum (Al), % 0
85.3 to 89
Carbon (C), % 0.040 to 0.1
0
Chromium (Cr), % 15.5 to 17.5
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 57.9 to 65.7
0 to 0.8
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.5
0 to 0.15
Nickel (Ni), % 15.5 to 17.5
0
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.3 to 0.6
11 to 13
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 2.5 to 3.5
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15