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S40930 Stainless Steel vs. AISI 317LN Stainless Steel

Both S40930 stainless steel and AISI 317LN stainless steel are iron alloys. Both are furnished in the annealed condition. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is S40930 stainless steel and the bottom bar is AISI 317LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
45
Fatigue Strength, MPa 130
250
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 76
84
Shear Modulus, GPa 75
79
Shear Strength, MPa 270
430
Tensile Strength: Ultimate (UTS), MPa 430
620
Tensile Strength: Yield (Proof), MPa 190
270

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 710
1010
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.3
4.3
Embodied Energy, MJ/kg 32
59
Embodied Water, L/kg 94
160

Common Calculations

PREN (Pitting Resistance) 11
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
220
Resilience: Unit (Modulus of Resilience), kJ/m3 94
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16
22
Strength to Weight: Bending, points 16
20
Thermal Diffusivity, mm2/s 6.7
3.9
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 10.5 to 11.7
18 to 20
Iron (Fe), % 84.7 to 89.4
57.9 to 67.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.5
11 to 15
Niobium (Nb), % 0.080 to 0.75
0
Nitrogen (N), % 0 to 0.030
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 0.020
0 to 0.030
Titanium (Ti), % 0.050 to 0.2
0