The specs of 904L pipe involve the standard (ASTM A312/ ASME SA312), OD (6-1016 mm), thickness (1-65 mm), and length (up to 18 m).
ASTM A312 Stainless Steel 904L Seamless Pipe Manufacturer
At Xintongda Special Steel (XTD), we manufacture Stainless Steel 904L seamless pipes in China and supply them all over the world. SS 904L seamless pipe is a non-stabilised high-alloy pipe made of austenitic stainless steel. The 904L pipe consists of nickel (23-28%), chromium (19-23%), molybdenum (4-5%), copper (1.0-2.0%), controlled silicon content (typically ≤1.0%), and other elements like manganese and carbon in the remaining proportions. It is known for its superior corrosion resistance in harsh chemical environments. ASTM A312 TP904L pipe is strong enough to withstand sulfuric acid due to its copper addition, while its high nickel and molybdenum content enhances resistance to chloride-containing environments, which makes it better than the 316L seamless pipe in aggressive corrosive conditions. Since the 904L alloy has low carbon, the pipe is easily weldable and is resistant to intergranular corrosion. SS Seamless 904L pipe’s ability to remain stable at elevated temperatures (up to 450 °C for corrosion resistance) makes it suitable for high temperature applications like heat exchangers, oil & gas, etc. Our stainless steel pipes adhere to ASTM A312 guidelines. With over 4 decades of experience in this industry, our company is multiple international certified.
The product specifications of SS 904L pipe are:
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Standard
ASTM A312
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OD Range
6-1016 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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Technical Data
Technical Data
SS 904L Seamless Pipe Manufacturing Process
Our 904L Seamless Stainless Steel Pipe is made by heating a solid billet of that alloy, then piercing and extruding to form a hollow shell. The shell then goes through hot working, followed by cold drawing/ cold rolling for the required dimensions. Next, we perform solution annealing to enhance corrosion resistance and optimise the alloy's austenitic structure. Before the pipe is sent for testing, acid pickling and final straightening are done to get a clean surface and dimensional accuracy. To know the manufacturing process in detail, please visit this page.
What are the Key Features of 904L Stainless Steel Pipe?
There are 6 properties of stainless steel 904L pipe that make it different from the others. These are corrosion resistance, high strength & toughness, low carbon content, non-magnetic, good weldability & formability, and high alloy content.
- Corrosion Resistance: SS 904L pipe has excellent resistance to pitting, corrosion, and crevice corrosion cracking because of its high nickel-chromium-molybdenum content.
- High Strength & Toughness: 904L pipe gets its strength from its highly alloyed austenitic structure. Due to this, it can easily withstand elevated temperatures and moderate pressure conditions.
- Low Carbon Content ( ≤0.02): Since the amount of carbon in this alloy is low, the pipe remains safe from sensitisation and intergranular corrosion.
- Non-Magnetic: 904L seamless pipe is generally non-magnetic due to its fully austenitic crystal structure resulting from its high nickel content. Slight paramagnetism may occur after cold working, but it does not affect performance.
- Good Weldability & Formability: The pipe’s unique chemical composition, especially the low carbon content, makes it more weldable and ductile.
- High Alloy Content: SS 904L has high amounts of chromium, nickel, molybdenum, and copper, due to which it forms a stable passive layer when exposed to harsh conditions. This results in excellent resistance to chlorides, acids, pitting, and crevice corrosion cracking.
ASTM A312 TP904L Seamless Pipe Equivalent Material
Stainless steel 904L seamless pipe is also generally referred to by its equivalent names like UNS N08904, 1.4539, AISI 904L, SUS 904L etc. Refer to the table below to understand it better.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 904L | N08904 | S31725 | 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
SS 904L Seamless Pipe Uses and Industry Applications
The applications of ASTM A312 TP904L seamless pipe include chloride-containing environments, chemical & petrochemical, hydrometallurgy, waste treatment, heat transfer, and pharmaceutical. The uses of 904L SS seamless piping are given below:
Chloride-Containing Environments
The 904L pipe is used in many chloride-containing environments, like desalination plants, pollution control equipment, marine, and offshore applications.
Chemical and Petrochemical
Used for acid handling, reactors & vessels, and condensers.
Hydrometallurgy
904L pipe is generally used in many hydrometallurgy applications like sulfuric acid production, phosphoric acid production, Flue Gas Desulfurisation (FGD), and general chemical processing.
Waste Treatment
This pipe finds its application in wastewater treatment plants, thermal oxidisers, sewage disposal applications, and organic acid treatment systems.
Heat Transfer
Used in seawater cooling systems, heat exchangers, pollution control equipment, etc.
Pharmaceutical
In the pharmaceutical industry, our SS 904L pipe is used for process piping, sterilisation systems, reactors & tanks, and equipment manufacturing.
Frequently Asked Questions
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What is the spec of 904L pipe?
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Can Stainless Steel 904L Pipes be used at high temperatures?Yes, stainless steel 904L pipes can be used at high temperatures mainly because of their good resistance and stability to heat, with continuous service up to 400-450 °C.
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Are your 904L pipes available in different sizes and wall thicknesses?Yes, our 904L pipes are available in outer diameter sizes ranging from 6-1016 mm and wall thicknesses from 1 to 65 mm.
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What makes 904L pipes different from other stainless steel grades?The thing that makes 904L pipes different from other stainless steel grades is the chemical composition, which includes high amounts of nickel, molybdenum, and copper. Due to these elements, the pipe is highly resistant to sulfuric acid and chlorides, pitting, and crevice corrosion.