904L Stainless Steel Pipe

Product Details:

SS 904L Seamless Pipe 1.5" NB x Schedule 10 is a high alloy austenitic stainless steel piping material specially developed for excellent corrosion resistance in highly aggressive environments, especially where sulphuric acid, chlorides, and chemical exposure are involved. It is commonly known by equivalent names such as ASTM A312 TP 904L, UNS N08904, EN 1.4539, and X1NiCrMoCu25-20-5, also referred to as DIN / Werkstoff 1.4539. This grade contains high Nickel and Chromium with added Molybdenum and Copper, giving superior resistance to pitting, crevice corrosion, stress corrosion cracking, and strong performance in acidic and marine conditions. SS 904L seamless pipes (1.5" NB Sch 10) provide excellent durability, smooth internal finish for better flow, good weldability, and long service life in critical pipelines. The common uses of SS 904L seamless pipe include chemical processing plants, fertilizer and petrochemical industries, heat exchangers, desalination and seawater systems, offshore platforms, acid handling lines, pharmaceutical and refinery piping, and high corrosion-service applications. Supplied by Raj Metals Mumbai +91 81045 97964.

Product Details:

The SS 904L Seamless Pipe in 1-1/2" NB × Schedule 40s is a high-alloy, low-carbon superaustenitic stainless steel pipe specially developed for extreme corrosion resistance. With a balanced composition of Nickel, Chromium, Molybdenum, and added Copper, this grade performs exceptionally well in sulphuric acid, phosphoric acid, seawater, and highly chloride-contaminated environments. Its seamless construction offers superior strength, uniform internal surface finish, and consistent pressure-bearing capability, making it highly reliable for critical fluid transfer.

SS 904L is known globally by several equivalent designations—its UNS number is N08904, the DIN/EN equivalent is 1.4539, and it is also recognized as X1NiCrMoCu25-20-5 under European standards. In ASTM/ASME standards it appears as ASTM A312 / A213 / A269 Grade 904L depending on product type. These equivalences highlight its international acceptance for high-corrosion environments in chemical plants, offshore systems, desalination units, heat exchangers, petrochemical lines, and pharmaceutical processing.

Despite continuous exposure to acidic media, high temperatures, or seawater, 904L maintains excellent mechanical stability and resistance to pitting, crevice corrosion, and stress-corrosion cracking, ensuring long service life and consistent performance across industries.

Manufactured & Supplied by Raj Metals Mumbai
+91 81045 97964

Product Details:

The SS 904L Pipe in 1.5″ NB × Schedule 10 is manufactured from a high-alloy, low-carbon austenitic stainless steel known for its excellent resistance to aggressive corrosion environments. Stainless Steel 904L contains high levels of nickel, chromium, molybdenum, and copper, which together provide superior resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich and acidic conditions. This makes it a preferred material for demanding chemical and industrial applications.

In terms of standards and grade identification, SS 904L is internationally recognized under multiple equivalent designations. It corresponds to UNS N08904 as per ASTM/ASME standards and EN 1.4539 under European norms. In DIN standards, it is commonly referred to as X1NiCrMoCu25-20-5. These equivalent names ensure global acceptability and ease of specification across projects involving international codes and approvals.

Dimensionally, a 1.1/2 inch NB Schedule 10 pipe has a nominal outside diameter of approximately 48.30 mm with a wall thickness of about 2.77 mm, as per ASME B36.19M standards for stainless steel piping. This schedule provides a balanced combination of mechanical strength and flow capacity, making it suitable for medium-pressure piping systems where corrosion resistance is critical.

From a performance perspective, SS 904L pipes exhibit good mechanical properties along with excellent weldability and formability. The low carbon content minimizes the risk of intergranular corrosion after welding, while the copper addition significantly improves resistance to reducing acids such as sulfuric acid. As a result, these pipes are widely used in chemical processing plants, petrochemical units, heat exchangers, seawater and desalination systems, pulp and paper industries, and pharmaceutical installations.

This SS 904L Pipe 1.5″ NB × Schedule 10 is manufactured by Raj Metals, Mumbai, ensuring reliable material quality, proper traceability, and adherence to applicable ASTM/ASME and EN standards.
Contact: Raj Metals, Mumbai | +91 81045 97964