317L Nickel Steel

Description

317L offers properties and chemical makeup similar to type 316, but with a higher alloy content. This is a molybdenum-bearing austenitic chromium nickel steel that offers exceptional resistance to corrosion and sulfurous acids. Ideal for applications where minimal contamination is required, 317L is safe from intergranular corrosion in instances where:

Low-temperature stress relieving processes are required
Heavy cross-sections can’t be annealed

Design features

Molybdenum-bearing austenitic chromium nickel steel possessing a higher alloy content than the similar 316
Improved tensile, stress-to-rupture and creep strengths compared to other stainless steels
Exceptional corrosion resistance that makes 317L ideal for harsh environments
Ideal for long-term use in highly corrosive environments thanks to crevice corrosion and pitting resistance
Lower intergranular precipitation of chromium carbides during stress relieving and welding process
Low carbon content means reduced chance of corrosion failure from intergranular corrosion

Applications

Chemical and petrochemical processing equipment
Paper and pulp plants
Flue gas desulfurization scrubber systems
Textile equipment

Product Type	Size Range	Wall/Pressure Class
Seamless Pipe	1/2” through 8”	10S, 40S (Std.), 80S (XH)
Welded Pipe	1.2” through 16”	10S, 40S
Butt Weld Fittings	1/2” through 16”	10S, 40S (Std.), 80S (XH)
Flanges	1/2” through 16”	150, 300
Pressure Fittings	1/8” through 2”	3000
Valves	1/2” through 6”	150#

317L Chemical Composition %

C	Co	Cr	Mn	Ni	P	S	Si	Ta
MAX			MAX		MAX	MAX	MAX
0.08	Trace	17.0-20.0	2.0	9.0-13.0	0.04	0.03	0.75	Trace

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