Specialist in Manufacturing Industrial Steel Fasteners

Stainless Steel 347/347H Pipes & Tubes

Stainless steel 347 has an excellent forming and welding qualities at cyrogenic temperatures, so the best material to be used in pipe fittings. Supplier and Exporter of high quality stainless steel 347/347H seamless and welded pipes & tubes. Vision alloys provide a wide range of SS 347/347H pipes and tubes in various schedule, type, form, length and much more by which you can easily find any grade of your need. These stainless steel pipes and tubes are very economical and thus are very valuable among the clients.

We design these SS 347/347H pipes & tubes (also known as UNS S34700/S34709 Pipes and Tubes) in tweaked sizesand thicknesses and consider various determinationa and measurements according to the customer needs and deliver worlwide.

Benefits of 347/347H SS Seamless and welded pripe & Tube:

  • When compare with 304, it has high creep stress and has rupture properties
  • Best work in higher temperature environment
  • Overcomes sensitization
  • Can be used in elevated temperature applications for ASME Boiler and pressure Vessel code applications
  • Offers better general erosion resistance due to stabilization
  • Excellent mechanical properties
  • A high carbon version is also available


High temperature chemical processes, Heat exchanger tubes, High temperature steam service, High pressure steam pipes, Radiant superheaters, Boiler tubes, Heavy duty exhaust systems, General refinery piping.

Specification :

Standard 347 -     ASTM /ASME A/SA 213 / 249 / 269 / 312 / 358 CL. I to V
347H - ASTM /ASME A/SA 213 / 249/ 269 / 312 / 358 CL. I to V
SEAMLESS 347/347H Pipes & Tubes 1/2" NB - 16" NB
ERW347/347H Pipes & Tubes 1/2" NB - 24" NB
EFW347/347H Pipes & Tubes 6" NB - 100" NB
Schedule SCH 10 – SCH XXS
Certifications IBR AND NON IBR
Type Seamless / ERW / EFW/ Fabricated / LSAW Pipes
Length Single Random, Double Random & Cut Length.
Form Round, Square, Rectangular, Hydraulic Etc
End Plain End, Beveled End, Threaded

Chemical Composition :

C Cr Mn Ni P S Si Cb/Ta
347 0.08 max min: 17.0
max: 20.0
2.0 max min: 9.0
max: 13.0
0.04 max 0.30
min:10x C
max: 1.0
347H min: 0.04
max: 0.10
min: 17.0
max: 20.0
2.0 max min: 9.0
max: 13.0
0.03 max 0.30
min:10x C
max: 1.0

Mechanical Properties :

Grade Tensile Strength ksi (MPa) min Yield Strength 0.2% ksi offset ksi (MPa) min Elongation (% in 50mm) min Hardness (Brinell) MAX Hardness (Rockwell B) MAX
347/347H 75
40 201 95

Physical Properties :

Coefficient of
Thermal Expansion (min/in)-°F
Thermal Conductivity BTU/hr-ft-°F Specific Heat BTU/lbm -°F Modules of Elasticity (annealed)2-psi
at 68 °F at 68 – 212°F at 68 – 1832°F 68-932°F at 32 – 212°F in tension (E)
0.288 9.2 11.4 14.7 0.12 28 x 106

Vision Alloys exports Stainless Steel 347/347H Pipes & Tubes to countries like Saudi Arabia, United Arab Emirates, Singapore, Malaysia, Germany, Iran, United Kingdom, Italy, Israel, Russia, United States Of America, South Africa, Kenya, Nigeria, Phillipines.

Other grades Available

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