347 achieves the same stabilisation as 321 using niobium, which does not oxidise across the arc the way titanium does. That makes it the stabilised grade of choice where the weld itself must be stabilised rather than just the parent metal, and it carries somewhat higher elevated-temperature strength than 321.
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
Rajgranth Metal & Alloys manufactures, stocks, supplies and exports Stainless Steel 347 and 347H welded Tubes (UNS S34700 / S34709) from Mumbai. Stabilised with niobium rather than titanium. Preferred where weld filler purity matters. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
347 achieves the same stabilisation as 321 using niobium, which does not oxidise across the arc the way titanium does. That makes it the stabilised grade of choice where the weld itself must be stabilised rather than just the parent metal, and it carries somewhat higher elevated-temperature strength than 321.
Stainless Steel 347 and 347H is also designated UNS S34700 / S34709, EN 1.4550 / 1.4912, AISI 347 / 347H, JIS SUS347 / SUS347H, GB S34778 and Werkstoff X6CrNiNb18-10 / X7CrNiNb18-10. Quote the designation your specification uses and we will supply to it.
Stabilisation survives the welding arc, unlike titanium, Higher creep strength than 321 at equivalent temperature and Well established in ASME pressure vessel service. It is non-magnetic, with excellent weldability and fair machinability, and is used in continuous service in air up to about 900 °C.
More expensive than 321 for equivalent performance in most duties and No improvement over 304 in chloride environments. We state these plainly so the grade is chosen for the right service.
Our published range covers outside diameter 4.7, 76.2 (mm — larger sizes to order), wall thickness 0.5 to 3.0 (mm), length 5 m, 6.5 m (Customised per requirement) and tube ends Plain, Bevelled. Standards include ASTM A213 / ASME SA-213, ASTM A269, ASTM A312 / ASME SA-312, ASTM A376 / ASME SA-376, ASTM A789 / ASME SA-789, ASTM A790 / ASME SA-790, ASTM A268 / ASME SA-268, ASTM A511, ASTM B163 / ASME SB-163 and ASTM B407 / ASME SB-407. Finishes and conditions include Bright Annealed (CFA), Solution Annealed (CFD), Electro Polished (EP), Polished (APP), Annealed and Pickled (AP), Mirror Polish, Matt Polish and Cold Drawn.
welded high-temperature pressure vessels, refinery and petrochemical piping, steam and power plant components and aircraft exhaust and collector rings. Typical industries: refinery, power & energy, aerospace, petrochemical and nuclear. We supply across India and export to markets in the Middle East, Africa, Europe, Asia, North America and South America.
Material is supplied with documentation, tested in house across 18 listed testing facilities, and covered by our ISO 9001:2015 quality management system. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
Individually listed because these are the sizes most often asked for. Everything else is supplied to order.
mm — larger sizes to order
mm
Customised per requirement
The full detail for this product as supplied from our Mumbai stockyard: sizes, grades, standards, tolerances, tests and applications.
We are leading Manufacturers, Stockholders, Suppliers & Exporters of Stainless Steel Welded Tubes Grades 347 in Mumbai, India.
Size x Thickness x Standard x Specification x Grade
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