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EN 1.4971 Stainless Steel vs. A390.0 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while A390.0 aluminum belongs to the aluminum alloys. There are 28 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 1.4971 stainless steel and the bottom bar is A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 210
75
Elongation at Break, % 34
0.87 to 0.91
Fatigue Strength, MPa 270
70 to 100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
28
Tensile Strength: Ultimate (UTS), MPa 800
190 to 290
Tensile Strength: Yield (Proof), MPa 340
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 300
640
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
580
Melting Onset (Solidus), °C 1410
480
Specific Heat Capacity, J/kg-K 450
880
Thermal Conductivity, W/m-K 13
130
Thermal Expansion, µm/m-K 15
20

Otherwise Unclassified Properties

Base Metal Price, % relative 70
11
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 7.6
7.3
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 300
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 280
240 to 580
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
52
Strength to Weight: Axial, points 26
19 to 30
Strength to Weight: Bending, points 23
27 to 36
Thermal Diffusivity, mm2/s 3.4
56
Thermal Shock Resistance, points 19
9.0 to 14

Alloy Composition

Aluminum (Al), % 0
75.3 to 79.6
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 24.3 to 37.1
0 to 0.5
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
16 to 18
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2