MakeItFrom.com
Menu (ESC)

S21900 Stainless Steel vs. A390.0 Aluminum

S21900 stainless steel belongs to the iron alloys classification, while A390.0 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 S21900 stainless steel and the bottom bar is A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 200
75
Elongation at Break, % 50
0.87 to 0.91
Fatigue Strength, MPa 380
70 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
28
Tensile Strength: Ultimate (UTS), MPa 710
190 to 290
Tensile Strength: Yield (Proof), MPa 390
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 290
640
Maximum Temperature: Mechanical, °C 980
170
Melting Completion (Liquidus), °C 1400
580
Melting Onset (Solidus), °C 1350
480
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 14
130
Thermal Expansion, µm/m-K 17
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
20
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
67

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 3.0
7.3
Embodied Energy, MJ/kg 43
140
Embodied Water, L/kg 160
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 380
240 to 580
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 26
19 to 30
Strength to Weight: Bending, points 23
27 to 36
Thermal Diffusivity, mm2/s 3.8
56
Thermal Shock Resistance, points 15
9.0 to 14

Alloy Composition

Aluminum (Al), % 0
75.3 to 79.6
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 59.4 to 67.4
0 to 0.5
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 8.0 to 10
0 to 0.1
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
16 to 18
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2