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347 Stainless steel pipe and tube
347 Stainless Steel  Pipes Tubes

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347 stainless Steel Pipes Tubes      
347 Stainless Steel is variant of the basic austenitic 18/8 Grade 304 with added Columbium - the introduction of Columbium stabilizes the steel and eliminates carbide precipitation which subsequently causes intergranular corrosion.

The steel has excellent forming and welding qualities and excellent toughness even at cryogenic temperatures.

Benefits of 347 Stainless Steel

  • Higher creep stress and rupture properties when compared with 304
  • Ideal for high temperature service
  • Overcomes sensitization and intergranular corrosion concerns
  • Can be used in elevated temperature applications for ASME Boiler and Pressure Vessel Code applications
  • Due to stabilisation the material offers better overall corrosion resistance when compared to 304/304L
  • Excellent mechanical properties
  • A high carbon version (347H) is also available

Typical Uses

  • Heat exchangers
  • High temperature steam service
  • High temperature chemical process

Both 347/347H are used primarily in elevated temperature applications.

Product Range

Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Sizes (Seamless): 1/2" NB - 24" NB
Sizes (ERW): 1/2" NB - 24" NB
Sizes (EFW): 6" NB - 100" NB  

Wall Thickness available:
Schedule 5S - Schedule XXS (heavier on request)

Other Materials Testing:

NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc.

Dimensions:


All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

General Properties of 347 Stainless Steel Pipes and Tubes

Alloys 321 (S32100) and 347 (S34700) are stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 15000F (427 to 8160C). Alloy 321 is stabilized against chromium carbide formation by the addition of titanium. Alloy 347 is stabilized by the addition of columbium and tantalum.

While Alloys 321 and 347 continue to be employed for prolonged service in the 800 to 15000F (427 to 8160C) temperature range, Alloy 304L has supplanted these stabilized grades for applications involving only welding or short time heating.

Alloys 321 and 347 stainless steels are also advantageous for high temperature service because of their good mechanical properties. Alloys 321 and 347 stainless steels offer higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and intergranular corrosion are concerns. This results in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications. The 321 and 347 alloys have maximum use temperatures of 15000F (8160C) for code applications like Alloy 304, whereas Alloy 304L is limited to 8000F (4260C).

High carbon versions of both alloys are available. These grades have UNS designations S32109 and S34709.

Chemical Composition of 347 Stainless Steel Pipes and Tubes
Represented by ASTM A240 and ASME SA-240 specifications.

 Element 347
Carbon* 0.08
Manganese 2.00
Phosphorus 0.045
Sulfur 0.03
Silicon 0.75
Chromium 17.00-19.00
Nickel 9.00-13.00
Columbium +
Tantalum**
10xC min to 1.00 max
Tantalum --
Titanium** --
Cobalt --
Nitrogen --
Iron Balance


Resistance to Corrosion of 347 Stainless Steel Pipes and Tubes

General Corrosion
Alloys 321 and 347 offer similar resistance to general, overall corrosion as the unstabilized chromium nickels Alloy 304. Heating for long periods of time in the chromium carbide precipitation range may affect the general resistance of Alloys 321 and 347 in severe corrosive media.

In most environments, both alloys will show similar corrosion resistance; however, Alloy 321 in the annealed condition is somewhat less resistant to general corrosion in strongly oxidizing environments than annealed Alloy 347. For this reason, Alloy 347 is preferable for aqueous and other low temperature environments. Exposure in the 8000F to 15000F (4270C to 8160C) temperature range lowers the overall corrosion resistance of Alloy 321 to a much greater extent than Alloy 347. Alloy 347 is used primarily in high temperature applications where high resistance to sensitization is essential, thereby preventing intergranular corrosion at lower temperatures.

Physical Properties of 347 Stainless Steel Pipes and Tubes

The physical properties of Types 321 and 347 are quite similar and, for all practical purposes, may be considered to be the same. The values given in the table may be used to apply to both steels.
When properly annealed, the Alloys 321 and 347 stainless steels consist principally of austenite and carbides of titanium or columbium. Small amounts of ferrite may or may not be present in the microstructure. Small amounts of sigma phase may form during long time exposure in the 10000F to 15000F (5930C to 8160C) temperature range.
The stabilized Alloys 321 and 347 stainless steels are not hardenable by heat treatment.
The overall heat transfer coefficient of metals is determined by factors in addition to thermal conductivity of the metal. In most cases, film coefficients, scaling, and surface conditions are such that not more than 10 to 15% more surface area is required for stainless steels than for other metals having higher thermal conductivity. The ability of stainless steels to maintain clean surfaces often allows better heat transfer than other metals having higher thermal conductivity.

Mechanical Properties of 347 Stainless Steel Pipes and Tubes

Room Temperature Tensile Properties
Minimum mechanical properties of the stabilized Alloys 321 and 347 chromium-nickel grades in the annealed condition (20000F [10930C], air cooled) are shown in the table.
Elevated Temperature Tensile Properties
Typical elevated temperature mechanical properties for Alloys 321 and 347 sheet / strip are shown below. Strength of these stabilized alloys is distinctly higher than that of non-stabilized 304 alloys at temperatures of 10000F (5380C) and above.

High carbon Alloys 321H and 347H (UNS32109 and S34700, respectively) have higher strength at temperatures above 10000F (5370C). ASME maximum allowable design stress data for Alloy 347H reflects the higher strength of this grade in comparison to the lower carbon Alloy 347 grade. The Alloy 321H is not permitted for Section VIII applications and is limited to 8000F (4270C) use temperatures for Section III code applications.

Heat Treatment of 347 Stainless Steel Pipes and Tubes

The annealing temperature range for Alloys 321 and 347 is 1800 to 20000F (928 to 10930C). While the primary purpose of annealing is to obtain softness and high ductility, these steels may also be stress relief annealed within the carbide precipitation range 800 to 15000F (427 to 8160C), without any danger of subsequent intergranular corrosion. Relieving strains by annealing for only a few hours in the 800 to 15000F (427 to 8160C) range will not cause any noticeable lowering in the general corrosion resistance, although prolonged heating within this range does tend to lower the general corrosion resistance to some extent. As emphasized, however, annealing in the 800 to 15000F (427 to 8160C) temperature range does not result in a susceptibility to intergranular attack.For maximum ductility, the higher annealing range of 1800 to 20000F (928 to 10930C) is recommended.



347 Stainless Steel Pipe and Tube Packing

347 Stainless Steel Seamless Pipes and Tubes is sleeved into plastic bag individually, 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.

SS 347 ASTM A312 Seamless Pipe packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.

Delivery: Within 10-25days or asap if we have enough stock

Types of Packaging:
  • - Bundles (hexagonal)
  • - Wooden Boxes
  • - Crates (steel/wooden)
  • - Special crates for U-Bend tubes with each radius separated
  • - Packaging for SS 347 ASTM A312 Seamless Pipe as per customer's requirements
Special Features:
  • - Each bundle covered with plastic for protection against extreme weather.
  • - End of SS 347 ASTM A312 Seamless Pipe protected by plastic caps.
  • - Bundles strapped with plastic strips.
  • - Each radius of U-Bend tube separated by a separator.
  • - Packaging list (laminated) placed with box/crate.

  • 347 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

    347 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 347 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.


    Prosaic Steel and Alloys is a well known worldwide exporter of 347 Stainless Steel Seamless Pipes and Tubes, Prosaic Steel and Alloys is committed to provide each and every customer with the highest standard of customer service. We deals in 347 Stainless Steel Seamless Pipes and Tubes in India & Overseas, offering a wide range of 347 Stainless Steel Seamless Pipes and Tubes.


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Call : +91-22-6659 5285 , 6639 4214
E-mail: inquiry@raajsagarsteels.com
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