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AISI 431 Stainless Steel vs. S31266 Stainless Steel

Both AISI 431 stainless steel and S31266 stainless steel are iron alloys. They have 59% 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 AISI 431 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 15 to 17
40
Fatigue Strength, MPa 430 to 610
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
81
Shear Strength, MPa 550 to 840
590
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
860
Tensile Strength: Yield (Proof), MPa 710 to 1040
470

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 400
440
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
37
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.2
6.5
Embodied Energy, MJ/kg 31
89
Embodied Water, L/kg 120
220

Common Calculations

PREN (Pitting Resistance) 16
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
290
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
29
Strength to Weight: Bending, points 27 to 36
24
Thermal Diffusivity, mm2/s 7.0
3.1
Thermal Shock Resistance, points 28 to 43
18

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 15 to 17
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 78.2 to 83.8
34.1 to 46
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 1.3 to 2.5
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5