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317L Stainless Steel Pipes and Tubes Product Range
317L Stainless Steel Pipes and Tubes Specifications: ASTM A/ASME SA 312/269/213/358 317L
Stainless Steel Pipes and Tubes Sizes (Seamless): 1/2” NB - 8” NB
317L Stainless Steel Pipes and Tubes Sizes (ERW): 1/2” NB - 24” NB
317L Stainless Steel Pipes and Tubes Sizes (EFW): 6” NB - 100” NB

317L Stainless Steel Pipes and Tubes Wall Thickness available:
Schedule 5S - Schedule XXS (heavier on request)

317L Stainless Steel Pipes and Tubes Other Materials Testing:
NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc.

317L Stainless Steel Pipes and Tubes Dimensions:
All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

317L Stainless Steel Seamless Pipes and Tubes used in below applications

• Flue-gas desulfurization systems
• Chemical process vessels
• Petrochemical
• Pulp and Paper
• Condensers in power generation

General Properties

Alloy 317LMN and 317L are molybdenum-bearing austenitic stainless steels with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Alloy 304. In addition, 317LMN and 317L alloys offer higher creep, stress-to-rupture, and tensile strengths at elevated temperatures than conventional stainless steels. All are low carbon or “L” grades to provide resistance to sensitization during welding and other thermal processes. The “M” and “N” designations indicate that the compositions contain increased levels of molybdenum and nitrogen respectively. The combination of molybdenum and nitrogen is particularly effective in enhancing resistance to pitting and crevice corrosion, especially in process streams containing acids, chlorides, and sulfur compounds at elevated temperatures. Nitrogen also serves to increase the strength of these alloys. Both alloys are intended for severe service conditions such as flue gas desulfurization (FGD) systems.

317L Stainless Steel Seamless Pipes and Tubes packaging & shipping policy

317L Stainless Steel Seamless Pipes and Tubes is sleeved into plastic bag individually, ten pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.

Alloy 317L Composition

Resistance to Corrosion
Alloys 317L and 317LMN stainless steels are more resistant to atmospheric and other mild types of corrosion than conventional chromium-nickel stainless steels. In general, environments that are not corrosive to 18Cr-8Ni steels will not attack alloys containing molybdenum, with the exception of highly oxidizing acids such as nitric acid.

Alloys 317LMN and 317L stainless steels are considerably more resistant than conventional chromium-nickel types to solutions of sulfuric acid. Resistance increases with alloy molybdenum content. These alloys are resistant to sulfuric acid concentrations up to 5 percent at temperatures as high as 120°F (49°C). At temperatures under 100°F (38°C) these alloys have excellent resistance to solutions of higher concentration. However, service tests are recommended to account for the affects of specific operating conditions that may affect corrosion behavior. In processes where condensation of sulfur-bearing gases occurs, these alloys are much more resistant to attack at the point of condensation than conventional Alloy 316. The acid concentration has a marked influence on the rate of attack in such environments and should be carefully determined by service tests.

The table below compares the corrosion resistance of annealed strip samples of 317LMN and 317L stainless steels in a variety of solutions related to the process industries as well as standard ASTM tests. Data on Alloy 316L and Alloy 276 are presented for comparison.

The low carbon (less than 0.03%) of these alloys effectively prevents sensitization to intergranular corrosion during thermal processes such as welding or forging. The higher chromium contents of 317LMN and Alloy 317L stainless steels also provide superior resistance to intergranular attack. It should be noted that prolonged exposure in the range 800 to 1400°F (427-816°C) can be detrimental to intergranular corrosion resistance and may also cause embrittlement due to precipitation of sigma phase. The higher nitrogen content of the 317LMN alloy retards the precipitation of sigma phase as well as carbides.

High molybdenum and nitrogen contents can significantly improve pitting resistance as illustrated in the preceding table of Pitting Resistance Equivalents (PRE). The PRE is based on the results of corrosion tests in which it was found that nitrogen was 30 times more effective than chromium and approximately 9 times more effective than molybdenum in enhancing chloride pitting resistance.

*72-hour exposure based on ASTM G-48B procedure using the following solution:
7 vol.%H2SO4, 3 vol%HCI, 1 wt% CuCl2, 1 wt%FeCl3

Oxidation Resistance
The chromium-nickel-molybdenum steels all have excellent resistance to oxidation and a low rate of scaling in ordinary atmospheres at temperatures up to 1600-1650°F (871-899°C).

Fabrication
The physical and mechanical properties of 317LMN and Alloy 317L stainless steels are similar to those of more conventional austenitic stainless steels and can, therefore, be fabricated in a manner similar to Alloys 304 and 316.

Heat Treatment

• Forging
  The recommended initial temperature range is 2100-2200°F (1150-1205°C) with a finishing range of 1700-1750°F (927-955°C).
• Annealing
  317LMN and Alloy 317L stainless steels can be annealed in the temperature range 1975-2150°F (1080-1175°C) followed by an air cool or water quench, depending on thickness. Plates should be annealed between 2100°F (1150°C) and 2150°F (1175°C). The metal should be cooled from the annealing temperature (from red/white to black) in less than three minutes.

Hardenability
These grades are not hardenable by heat treatment.
The use of an overalloyed filler is suggested to maintain corrosion resistance in the as-welded condition. Filler metals containing at least 6% molybdenum are suggested for welding Alloy 317L and a filler metal with at least 8% molybdenum, such as Alloy 625, is suggested for 317LMN. In applications where it is not possible to use an overalloyed filler metal or to perform a post-weld anneal and pickle treatment, the severity of the service environment should be carefully considered to determine if the properties of autogenous welds (weld made without a filler) are satisfactory. The optimum corrosion resistance of autogenously welded 317LMN and Alloy 317L stainless steels is obtained by post-weld annealing and pickling. ASTM A-380 “Recommended Practice for Descaling and Cleaning Steel Surfaces” is suggested for more information.

Mechanical Properties 
The ASTM specified minimum tensile properties and maximum hardness for annealed plate, sheet, and strip products are shown in the following table.

Physical Properties
The physical property data which follows represent the iron-chromium-nickel-molybdenum class of stainless steels. For all practical purposes, the data are applicable to 317LMN and Alloy 317L stainless steels. All properties are at room temperature (68°F, 20°C) unless stated otherwise.

316H Stainless Steel Seamless Pipe Sizes Available in Stock with Price
• 1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1-1/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 2-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 5" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 6" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 8" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 10" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 12" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 14" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 16" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 18" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

316H Stainless Steel Seamless Tube Sizes in Thickness SWG/BWG Available in Stock with Price
• 1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 5/16" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 3/8" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 1" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 1-1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 1-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 1-3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 2-1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 2-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 2-3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 3" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 3-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 4-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
• 5" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge

We export 304 Stainless Steel Seamless Pipe and Seamless Tube to Iran, Iraq, Oman, Qatar, Albania, Muscat, Bahrain, Turkey, Egypt, Maldives, Italy, UAE, Bahrain, Indonesia, Australia, Kuwait, Saudi Arabia, South Africa, Germany, UK, Denmark, Canada, USA, Peru, Brazil, Nizeria, Mexico, Venezuela (Latin America), South America, Russia, kazakhstan etc.

Distributors and Dealers of ...

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