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S33550 Stainless Steel vs. AISI 317LN Stainless Steel

Both S33550 stainless steel and AISI 317LN stainless steel are iron alloys. Both are furnished in the annealed condition. They have 87% of their average alloy composition in common.

For each property being compared, the top bar is S33550 stainless steel and the bottom bar is AISI 317LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
45
Fatigue Strength, MPa 270
250
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 82
84
Shear Modulus, GPa 79
79
Shear Strength, MPa 470
430
Tensile Strength: Ultimate (UTS), MPa 680
620
Tensile Strength: Yield (Proof), MPa 310
270

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 470
420
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.3
4.3
Embodied Energy, MJ/kg 61
59
Embodied Water, L/kg 190
160

Common Calculations

PREN (Pitting Resistance) 30
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
220
Resilience: Unit (Modulus of Resilience), kJ/m3 250
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 3.9
3.9
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.030
Cerium (Ce), % 0.025 to 0.070
0
Chromium (Cr), % 25 to 28
18 to 20
Iron (Fe), % 48.8 to 58.2
57.9 to 67.9
Lanthanum (La), % 0.025 to 0.070
0
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 16.5 to 20
11 to 15
Niobium (Nb), % 0.050 to 0.15
0
Nitrogen (N), % 0.18 to 0.25
0.1 to 0.22
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030