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S31803 Stainless Steel vs. N08366 Stainless Steel

Both S31803 stainless steel and N08366 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 77% of their average alloy composition in common. There are 33 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 S31803 stainless steel and the bottom bar is N08366 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
180
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 29
34
Fatigue Strength, MPa 370
190
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
80
Shear Strength, MPa 460
390
Tensile Strength: Ultimate (UTS), MPa 710
590
Tensile Strength: Yield (Proof), MPa 500
240

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 1060
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 13
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 17
33
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.6
6.2
Embodied Energy, MJ/kg 49
84
Embodied Water, L/kg 160
200

Common Calculations

PREN (Pitting Resistance) 34
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
160
Resilience: Unit (Modulus of Resilience), kJ/m3 630
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
20
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.3
3.4
Thermal Shock Resistance, points 20
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.035
Chromium (Cr), % 21 to 23
20 to 22
Iron (Fe), % 63.7 to 71.9
42.4 to 50.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
6.0 to 7.0
Nickel (Ni), % 4.5 to 6.5
23.5 to 25.5
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030