N08904 / 1.4539 Stainless Steel Sanitary Tube Supplier in China
Elevate your system’s performance with our N08904 / 1.4539 sanitary tubes. This high-alloy austenitic stainless steel, fortified with copper, offers superior resistance to a wide range of corrosive media, especially sulfuric acid. Combined with a high-purity finish, it ensures total system integrity for demanding biopharmaceutical and chemical processing applications.
N08904 / 1.4539 Sanitary Tube - Detailed Specifications
| Specification Parameter | Details |
|---|---|
| Product Name | N08904 / 1.4539 Stainless Steel Sanitary Tube |
| Governing Standard | ASTM A270 (Standard Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing) |
| Raw Material Standard | ASTM A240 / ASME SA-240 |
| International Grades | UNS: N08904, EN: 1.4539, Common Name: Alloy 904L |
| Outer Diameter (OD) | 1/2 to 4" (12.7mm to 101.6mm)" |
| Wall Thickness (WT) | 0.065" (1.65mm), 0.083" (2.11mm), etc. |
| Length | 20 ft (6.1 meters), or custom lengths |
| Surface Finish Options | SF1: Mechanically Polished ID/OD (<20 µ-in / 0.5 µm Ra ID) |
| SF4: Electropolished ID / Mechanically Polished OD (<15 µ-in / 0.38 µm Ra ID) | |
| Key Features | High resistance to sulfuric, phosphoric, and other non-oxidizing acids due to high copper content. Good resistance to pitting and crevice corrosion. Excellent formability and weldability. |
| Testing & Inspection | NDT (Eddy Current), Surface Roughness Test, Mechanical Tests (Flattening, Reverse Bend), PMI, Chemical Analysis |
Understanding ASTM A240 & ASTM A270
What It Is:
These two standards work in tandem to guarantee a product that is both materially superior and hygienically sound.
ASTM A240: This is the master specification for the N08904 (904L) plate itself, dictating its unique chemical composition—including high levels of nickel, molybdenum, and copper.
ASTM A270: This is the definitive standard for sanitary tubing. It governs the manufacturing process, surface finish (Ra), cleanliness, and testing required to produce a hygienic, contamination-free final product.
A Certified Combination: We start with fully certified A240 material to create a sanitary tube that meets or exceeds all ASTM A270 requirements.
Why It Is Your Core Focus:
Our strict adherence to both standards is our promise of delivering a robust, reliable, and pure solution for your critical systems.
It guarantees superior performance against moderately to highly corrosive media where 316L would be inadequate, especially in the presence of sulfuric acid.
It ensures an ultra-smooth, crevice-free internal surface that minimizes bio-burden and allows for effective, repeatable Clean-in-Place (CIP) cycles.
This dual certification simplifies your validation process with fully traceable materials and comprehensive MTCs, essential for regulated industries.
N08904 / 1.4539 Stainless Steel Material Properties
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.020 |
| Chromium (Cr) | 19.0 - 23.0 |
| Nickel (Ni) | 23.0 - 28.0 |
| Molybdenum (Mo) | 4.0 - 5.0 |
| Copper (Cu) | 1.0 - 2.0 |
| Nitrogen (N) | 0.10 |
| Manganese (Mn) | 2.00 |
| Silicon (Si) | 1.00 |
| Property | Value (Minimum) |
|---|---|
| Tensile Strength | 71 ksi (490 MPa) |
| Yield Strength (0.2% Offset) | 31 ksi (215 MPa) |
| Elongation in 2 (50mm)" | 35% |
| Hardness | 90 HRB (Maximum) |
Versatile Applications of N08904 / 1.4539 Sanitary Tube
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Get a Quote for N08904 / 904L Sanitary Tube
Engineered to master aggressive acids like sulfuric and phosphoric, our N08904 / 904L sanitary tube provides the ultimate protection for your high-purity processes. Ensure total product integrity and long-term system reliability. Contact our technical specialists to discuss your application and receive a detailed quotation today.
