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N08031 Stainless Steel vs. S31266 Stainless Steel

Both N08031 stainless steel and S31266 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 30 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 N08031 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 45
40
Fatigue Strength, MPa 290
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
81
Shear Strength, MPa 510
590
Tensile Strength: Ultimate (UTS), MPa 730
860
Tensile Strength: Yield (Proof), MPa 310
470

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 460
460
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 18
16

Otherwise Unclassified Properties

Base Metal Price, % relative 39
37
Density, g/cm3 8.1
8.2
Embodied Carbon, kg CO2/kg material 7.1
6.5
Embodied Energy, MJ/kg 96
89
Embodied Water, L/kg 240
220

Common Calculations

PREN (Pitting Resistance) 52
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
290
Resilience: Unit (Modulus of Resilience), kJ/m3 230
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25
29
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 3.1
3.1
Thermal Shock Resistance, points 14
18

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.030
Chromium (Cr), % 26 to 28
23 to 25
Copper (Cu), % 1.0 to 1.4
1.0 to 2.5
Iron (Fe), % 29 to 36.9
34.1 to 46
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 6.0 to 7.0
5.2 to 6.2
Nickel (Ni), % 30 to 32
21 to 24
Nitrogen (N), % 0.15 to 0.25
0.35 to 0.6
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5