Our 904L tubing performs exceptionally well in marine environments. It offers high resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking in seawater.
ASTM A213 904L Stainless Steel Seamless Tube Manufacturer
We are Xintongda Special Steel (XTD), a China-based manufacturer and global supplier of 904L stainless steel seamless tubes. The 904L SS seamless tube, also known as 2RK65 or TP904L, is a high-alloy austenitic stainless steel made from 23-28% nickel, 19-23% chromium, 4-5% molybdenum, 1-2% copper, max 0.02% carbon, and other elements in the remaining proportions. We manufacture our 904L SS tube strictly according to ASTM A213, A269, and A312 standards. The SS TP 904L tube is highly resistant to corrosion in acidic environments, like sulfuric, phosphoric, and acetic acid. It can also resist pitting, crevice corrosion, and stress corrosion cracking. The low carbon content in the UNS N08904 tube reduces intergranular corrosion. These features make 904L seamless tube useful in chemical, oil & gas, power generation, and many other industrial applications.
As a reliable 904L stainless steel tube supplier, we promise to deliver in-stock products within a week and production orders in 15-60 days. We hold around 4 decades of experience and are multiple international certified.
Product specifications:
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Standard ASTM A213 -
OD Range 6.35-257 mm -
Thickness 0.89-12.7 mm -
Length ≤ 22 m
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Technical Data
Technical Data
SS 904L Seamless Tube Manufacturing Process
We make our 904L Seamless Stainless Steel Tube by heating and piercing a solid billet of austenitic stainless steel to form a hollow shell out of it. Then, the hollow shell is hot worked and cold rolled to get its precise dimensions. The next step is solution annealing to retain its corrosion resistance and mechanical properties. At the end, we pickle and straighten the tube before sending it for non-destructive testing. You can read the whole manufacturing process by clicking on this link.
What are the Key Features of 904L Stainless Steel Tube
Our 904L SS tube offers 5 key features: formability & weldability, low carbon content, corrosion resistance, high alloy content, and non-magnetic properties.
- Good Formability & Weldability: Some factors like fully austenitic structure, mandatory solution annealing, absence of hardenable phases, and low carbon content, make TP904L tube easily weldable and formable.
- Low Carbon Content: The low carbon content, as mentioned above, prevents carbide precipitation during the welding process, resists intergranular corrosion, and maintains ductility.
- Superior Corrosion Resistance: Our 904L seamless tube provides superior corrosion resistance for several reasons. The high chromium content forms a passive oxide layer and prevents oxidation and general corrosion; the high amount of nickel stabilises the austenitic structure and improves corrosion resistance in reducing and acidic environments; the addition of molybdenum enhances resistance to pitting and crevice corrosion.
- High Alloy Content: The high alloying content (nickel, chromium, molybdenum, and copper) increases overall corrosion resistance, gives stability to the austenitic structure, and makes solution annealing mandatory.
- Non-Magnetic: Our TP904L tube, like other austenitic stainless steels, has a face-centred cubic (FCC) crystal structure, which is non-magnetic in the solution-annealed condition. The high nickel content ensures a fully austenitic microstructure with no ferrite, contributing to its non-magnetic behaviour.
ASTM A213 TP 904L Seamless Tube Equivalent Material
The 904L seamless tube is globally known by its standard designation as UNS N08904. It is also recognised by its Werkstoff number as DIN 1.4539.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 904L | N08904 | S31782 | 015Cr20Ni18Mo6Cu2 | SUS890L | X1NiCrMoCu25-20-5 | 1.4539 | / |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate( Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What are the main applications of TP904L Seamless Tubes in industry?
The applications of ASME SA213 TP904L Stainless Steel Tube include:
Chemical & Refining Industries
Mainly used in heat exchangers to handle
corrosive fluids, process piping in acid processing units, sour &
chloride-rich service lines, and chemical reactors & reboilers.
Power Generation Systems
The TP904L tube is found in condensers of
thermal power plants, Flue Gas Desulphurisation (FGD) systems, nuclear
power plant secondary systems, boiler auxiliary & balance-of-plant
systems, etc.
Marine & Seawater Environments
For the marine industry, this tube is
generally used in desalination and seawater processing units, offshore
platform cooling and utility systems, marine exhaust gas systems, and
condensers in coastal and marine power installations.
Oil & Gas Applications
Used in desalting and produced-water treatment units, chemical injection & process support systems, LNG & gas liquefaction auxiliary systems, and sour service and sulphur-containing environments.
Desalination & RO Plants
TP904L tube finds its use in RO plant
pre-treatment heat exchangers, brine heaters in thermal desalination
systems, and auxiliary cooling and utility systems.
Desalination Plants
The 1.4462 tube is used in high-pressure
piping systems that turn seawater into fresh water. It survives the high
salt concentrations that would quickly destroy lower grades of steel.
Pulp & Paper
The tube is used in digesters and bleach plant
equipment. It withstands the highly alkaline and acidic liquids used
during the wood pulping and paper whitening processes.
Frequently Asked Questions
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How does SS 904L tubing perform in marine environments?