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S31266 Stainless Steel vs. S82122 Stainless Steel

Both S31266 stainless steel and S82122 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 68% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S31266 stainless steel and the bottom bar is S82122 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 400
360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 590
460
Tensile Strength: Ultimate (UTS), MPa 860
680
Tensile Strength: Yield (Proof), MPa 470
450

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 440
430
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
12
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 6.5
2.6
Embodied Energy, MJ/kg 89
37
Embodied Water, L/kg 220
150

Common Calculations

PREN (Pitting Resistance) 54
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
210
Resilience: Unit (Modulus of Resilience), kJ/m3 540
510
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
25
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 3.1
4.0
Thermal Shock Resistance, points 18
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 23 to 25
20.5 to 21.5
Copper (Cu), % 1.0 to 2.5
0.5 to 1.5
Iron (Fe), % 34.1 to 46
68.9 to 75.4
Manganese (Mn), % 2.0 to 4.0
2.0 to 4.0
Molybdenum (Mo), % 5.2 to 6.2
0 to 0.6
Nickel (Ni), % 21 to 24
1.5 to 2.5
Nitrogen (N), % 0.35 to 0.6
0.15 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.020
0 to 0.020
Tungsten (W), % 1.5 to 2.5
0