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EN 1.4945 Stainless Steel vs. 3004 Aluminum

EN 1.4945 stainless steel belongs to the iron alloys classification, while 3004 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 3004 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
45 to 83
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 19 to 34
1.1 to 19
Fatigue Strength, MPa 230 to 350
55 to 120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430 to 460
100 to 180
Tensile Strength: Ultimate (UTS), MPa 640 to 740
170 to 310
Tensile Strength: Yield (Proof), MPa 290 to 550
68 to 270

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 920
180
Melting Completion (Liquidus), °C 1490
650
Melting Onset (Solidus), °C 1440
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 14
160
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
42
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
140

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.5
Density, g/cm3 8.1
2.8
Embodied Carbon, kg CO2/kg material 5.0
8.3
Embodied Energy, MJ/kg 73
150
Embodied Water, L/kg 150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
3.2 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
33 to 540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 22 to 25
18 to 31
Strength to Weight: Bending, points 20 to 22
25 to 37
Thermal Diffusivity, mm2/s 3.7
65
Thermal Shock Resistance, points 14 to 16
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
95.6 to 98.2
Carbon (C), % 0.040 to 0.1
0
Chromium (Cr), % 15.5 to 17.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 57.9 to 65.7
0 to 0.7
Magnesium (Mg), % 0
0.8 to 1.3
Manganese (Mn), % 0 to 1.5
1.0 to 1.5
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
0 to 0.3
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 2.5 to 3.5
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15