904L is a super-austenitic with roughly 25% nickel, 20% chromium, 4.5% molybdenum and a deliberate copper addition that specifically targets resistance to sulphuric and phosphoric acid. The high nickel content also raises resistance to chloride stress corrosion cracking well above the 300 series. It is expensive, and in many chloride duties a duplex grade delivers comparable resistance at lower cost and higher strength.
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
Rajgranth Metal & Alloys manufactures, stocks, supplies and exports Stainless Steel 904L welded Tubes (UNS N08904) from Mumbai. High nickel, high molybdenum, with copper. Built for sulphuric acid service. 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.
904L is a super-austenitic with roughly 25% nickel, 20% chromium, 4.5% molybdenum and a deliberate copper addition that specifically targets resistance to sulphuric and phosphoric acid. The high nickel content also raises resistance to chloride stress corrosion cracking well above the 300 series. It is expensive, and in many chloride duties a duplex grade delivers comparable resistance at lower cost and higher strength.
Stainless Steel 904L is also designated UNS N08904, EN 1.4539, AISI 904L, JIS SUS890L, GB S39042 and Werkstoff X1NiCrMoCu25-20-5. Quote the designation your specification uses and we will supply to it.
Resists dilute sulphuric and phosphoric acid where 316L fails, High resistance to chloride stress corrosion cracking, Fully austenitic, so tough down to cryogenic temperatures and Excellent crevice corrosion resistance. It is non-magnetic, with good weldability and difficult machinability, and is used in continuous service in air up to about 400 °C.
Four to five times the cost of 304, Low mechanical strength relative to duplex at similar PREN, Difficult to machine — requires rigid setup and sharp tooling and Long lead times outside held stock. 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.
sulphuric acid plant and storage, phosphoric acid and fertiliser production, flue gas scrubbing systems, seawater and brine handling and pickling plant equipment. Typical industries: chemical, fertiliser, petrochemical, marine & shipbuilding and power & energy. 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.
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.
Rajgranth Metals is a Trusted Manufacturers, Exporters, Suppliers & Stockholders of Stainless Steel Welded Tubes Grades 904 in Mumbai, India.
Size x Thickness x Standard x Specification x Grade
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