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EN 1.4303 Stainless Steel vs. EN AC-44100 Aluminum

EN 1.4303 stainless steel belongs to the iron alloys classification, while EN AC-44100 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 1.4303 stainless steel and the bottom bar is EN AC-44100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
59
Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 13 to 49
4.9
Fatigue Strength, MPa 220 to 320
64
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 590 to 900
180
Tensile Strength: Yield (Proof), MPa 230 to 560
87

Thermal Properties

Latent Heat of Fusion, J/g 290
570
Maximum Temperature: Mechanical, °C 940
170
Melting Completion (Liquidus), °C 1420
590
Melting Onset (Solidus), °C 1380
580
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 16
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
120

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.8
2.5
Embodied Carbon, kg CO2/kg material 3.2
7.7
Embodied Energy, MJ/kg 46
140
Embodied Water, L/kg 150
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 230
7.1
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
53
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 25
55
Strength to Weight: Axial, points 21 to 32
19
Strength to Weight: Bending, points 20 to 26
27
Thermal Diffusivity, mm2/s 4.0
58
Thermal Shock Resistance, points 13 to 20
8.2

Alloy Composition

Aluminum (Al), % 0
84.4 to 89.5
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 64.8 to 72
0 to 0.65
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 2.0
0 to 0.55
Nickel (Ni), % 11 to 13
0 to 0.1
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
10.5 to 13.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15