Stainless Steel 347 / 347H Seamless Pipes Manufacturer

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Silver Tubes is engaged in supplying stainless steel products. We are manufacturing and supplying the heavy-duty SS 347/347H Seamless Pipes which are known for its reliable features. We use state of art technologies to manufacture these seamless pipes. Our aim is to fulfill various requirements of SS pipes, thus we manufacture pipes in a variety of specifications, designations and custom dimensions.

General characteristics of pipes:-
SS 347/347H Seamless Pipes from silver tubes are elaborated to meet national and international standards of quality. These pipes are stabilized with niobium element, it attains higher corrosion resistance property at elevated temperatures which are it is known for. When SS pipes are exposed into temperature ranging from 450 deg C to 900 deg C, it tends to form chromium carbide precipitate in the grain boundary area. However, it also affected by the intergranular corrosion effects.

SS 347/347H Seamless Pipes does not have any welded joints. It is ideally manufactured from a solid billet. Its each end is connected to another pipe without any welding joint. At both ends of pipes, threads are present to connect pipes. Seamless pipes are known for safety measures. These are short in length but continuous in the length. These pipes are mainly extruded.

The stabilization of 347/347H grade inhibits the formation of chromium carbide precipitate. This increases the resistance to corrosion. it is filled by higher mechanical properties and has good cold-forming properties. Stainless steel 347/ 347H is dual certified with lower and higher carbon version.

To check out the quality of each pipe we perform several tests such as strength tests and material tests.

Strength tests:-

  • Mechanical test
  • Tensile test
  • Thermal stability test
  • Compression test

Material tests:-

  • Pitting corrosion test
  • Positive material test
  • Radiography
  • Ultrasonic test

We pack and deliver SS 347/347H Seamless Pipes in wooden cases or in big bundles to protect different type’s damages while exporting.

Stainless Steel 347/347H Pipes

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Stainless Steel 347/347H Seamless Pipe Specification
Specifications ASTM A312/ ASME SA312
Seamless Pipes 1 / 2" NB - 16" NB
Outside Diameter 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Thickness Range 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type Seamless
Form Round Pipes, Square Pipes, Rectangular Pipes
Length Single Random, Double Random & Required Length
End Plain End, Beveled End, Treaded
Outside Finish 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements
Delivery Condition Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
EN 10216-5 EN 10216 347/347H Seamless Steel Pipe, EN 10216-5 1.4550 Seamless Steel Pipes for pressure purposes
EN 10217-7 EN 10217 347/347H Welded Steel Pipe, Steel EN 10217-7 1.4961 Welded Pipes for pressure purposes

Stainless Steel UNS S34700/S34709 Seamless Pipes Equivalent Grades

SS 347 S34700 1.4550 X6CrNiNb18-10 SUS 347 08Ch18N12B
SS 347H S34709 1.4961 X6CrNiNb18-12 SUS 347H -

347/347H Stainless Steel Seamless Pipes Chemical Composition

Grade C Mn Si P S Cr Cb Ni Fe
SS 347 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 20.00 10xC – 1.10 9.00 - 13.00 62.74 min
SS 347H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 8xC – 1.10 9.0 -13.0 63.72 min

ASME SA312 SS TP347/TP347H Seamless Pipes Mechanical Properties

Tensile Strength Yield Strength (0.2%Offset) Elongation Hardness
Rockwell B (HR B) max Brinell (HB) max
Psi – 75000, MPa – 515 Psi – 30000, MPa – 205 35 % 92 201
SS 347/347H Pipes
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Supplier and Exporter of Stainless Steel 347/347H Seamless Pipes in Cities of India Like

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Supplier and Exporter of Stainless Steel 347 / 347H Seamless Pipes in Countries Like

Lebanon, Iran, Yemen, Germany, Bangladesh, Slovakia, Austria, Hong Kong, Netherlands, United Arab Emirates, Argentina, Thailand, Venezuela, Switzerland, Gambia, Ecuador, Greece, Serbia, Indonesia, Saudi Arabia, South Africa, Belgium, Croatia, Nigeria, South Korea, Brazil, Kuwait, Gabon, Mongolia, Estonia, Bulgaria, Morocco, United States, Sweden, Azerbaijan, France, Chile, Malaysia, Mexico, Namibia, Oman, Philippines, Mexico, Ukraine, Puerto Rico, Vietnam, Ireland, Costa Rica, United Kingdom, Bolivia, Bahrain, Lithuania, Libya, Norway, Singapore, Qatar, Poland, Tunisia, Angola, Kenya, Jordan, Macau, Sri Lanka, Russia, Hungary, Colombia, Nepal, Finland, Canada, Afghanistan, Kazakhstan, Zimbabwe, China, Iraq, Israel, Australia, Algeria, Italy, Ghana, Bhutan, Portugal, Turkey, Belarus, Japan, Egypt, Trinidad & Tobago, Romania, Chile, New Zealand, Iran, Pakistan, India, Denmark, Taiwan, Spain, Peru, Poland, Czech Republic, Nigeria, Tibet.