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S40920 Stainless Steel vs. N08366 Stainless Steel

Both S40920 stainless steel and N08366 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 59% of their average alloy composition in common.

For each property being compared, the top bar is S40920 stainless steel and the bottom bar is N08366 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 22
34
Fatigue Strength, MPa 130
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 77
82
Shear Modulus, GPa 75
80
Shear Strength, MPa 270
390
Tensile Strength: Ultimate (UTS), MPa 430
590
Tensile Strength: Yield (Proof), MPa 190
240

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 710
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 26
13
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
33
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.0
6.2
Embodied Energy, MJ/kg 28
84
Embodied Water, L/kg 94
200

Common Calculations

PREN (Pitting Resistance) 11
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
160
Resilience: Unit (Modulus of Resilience), kJ/m3 97
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
20
Strength to Weight: Bending, points 16
19
Thermal Diffusivity, mm2/s 6.9
3.4
Thermal Shock Resistance, points 15
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.035
Chromium (Cr), % 10.5 to 11.7
20 to 22
Iron (Fe), % 85.1 to 89.4
42.4 to 50.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.5
23.5 to 25.5
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0.15 to 0.5
0