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AISI 201LN Stainless Steel vs. 712.0 Aluminum

AISI 201LN stainless steel belongs to the iron alloys classification, while 712.0 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 AISI 201LN stainless steel and the bottom bar is 712.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
75 to 90
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 25 to 51
4.5 to 4.7
Fatigue Strength, MPa 340 to 540
140 to 180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
27
Shear Strength, MPa 530 to 680
180
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
250 to 260
Tensile Strength: Yield (Proof), MPa 350 to 770
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 280
380
Maximum Temperature: Mechanical, °C 880
190
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
610
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
160
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.7
3.0
Embodied Carbon, kg CO2/kg material 2.6
8.0
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 140
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
11
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
240 to 270
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 27 to 38
24 to 25
Strength to Weight: Bending, points 24 to 30
30 to 31
Thermal Diffusivity, mm2/s 4.0
62
Thermal Shock Resistance, points 16 to 23
11

Alloy Composition

Aluminum (Al), % 0
90.7 to 94
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 17.5
0.4 to 0.6
Copper (Cu), % 0 to 1.0
0 to 0.25
Iron (Fe), % 67.9 to 73.5
0 to 0.5
Magnesium (Mg), % 0
0.5 to 0.65
Manganese (Mn), % 6.4 to 7.5
0 to 0.1
Nickel (Ni), % 4.0 to 5.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0 to 0.3
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.15 to 0.25
Zinc (Zn), % 0
5.0 to 6.5
Residuals, % 0
0 to 0.2