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S40920 Stainless Steel vs. S31266 Stainless Steel

Both S40920 stainless steel and S31266 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 52% 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 S40920 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 22
40
Fatigue Strength, MPa 130
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
81
Shear Strength, MPa 270
590
Tensile Strength: Ultimate (UTS), MPa 430
860
Tensile Strength: Yield (Proof), MPa 190
470

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Corrosion, °C 450
440
Maximum Temperature: Mechanical, °C 710
1100
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
37
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.0
6.5
Embodied Energy, MJ/kg 28
89
Embodied Water, L/kg 94
220

Common Calculations

PREN (Pitting Resistance) 11
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
290
Resilience: Unit (Modulus of Resilience), kJ/m3 97
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
29
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 6.9
3.1
Thermal Shock Resistance, points 15
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 10.5 to 11.7
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 85.1 to 89.4
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), % 0 to 0.5
21 to 24
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
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 0.020
0 to 0.020
Titanium (Ti), % 0.15 to 0.5
0
Tungsten (W), % 0
1.5 to 2.5