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AISI 347LN Stainless Steel vs. AISI 317L Stainless Steel

Both AISI 347LN stainless steel and AISI 317L stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is AISI 347LN stainless steel and the bottom bar is AISI 317L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
44
Fatigue Strength, MPa 200
220
Poisson's Ratio 0.28
0.28
Reduction in Area, % 56
56
Rockwell B Hardness 79
81
Shear Modulus, GPa 77
82
Shear Strength, MPa 400
380
Tensile Strength: Ultimate (UTS), MPa 590
550
Tensile Strength: Yield (Proof), MPa 230
250

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 940
1010
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 18
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.5
4.3
Embodied Energy, MJ/kg 49
59
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 19
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
200
Resilience: Unit (Modulus of Resilience), kJ/m3 130
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 4.1
3.8
Thermal Shock Resistance, points 13
12

Alloy Composition

Carbon (C), % 0.0050 to 0.020
0 to 0.030
Chromium (Cr), % 17 to 19
18 to 20
Iron (Fe), % 64.3 to 73.7
58 to 68
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 9.0 to 13
11 to 15
Niobium (Nb), % 0.2 to 0.5
0
Nitrogen (N), % 0.060 to 0.1
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030