SS 904L Tubes.
Precision tube for heat exchangers, boilers, condensers and instrumentation lines. Supplied to ASTM B677 / B674 UNS N08904.
Quick details
| Material grade | SS 904L (UNS N08904) |
|---|---|
| Standard | ASTM B677 / B674 UNS N08904 |
| Type | Seamless, Welded, U-bent heat-exchanger tube, Instrumentation tube |
| Outside diameter | 6 mm to 101.6 mm (1/4" to 4"); other sizes on enquiry |
| Usage / application | Sulphuric and phosphoric acid plant, Seawater-cooled heat exchangers, Pulp bleaching equipment |
| Test certificate | EN 10204 3.1 mill test certificate; 3.2 on request |
| Business type | Stockist and supplier |
| Location | Kumbharwada, Mumbai 400004, Maharashtra |
Also searched as: SS 904L tube, 904L stainless steel tube, stainless steel 904L tube, ASTM B677 tube, UNS N08904 tube, 1.4539 tube
Product information for purchasing teams
SS 904L is a high-alloy austenitic stainless with 23 to 28% nickel, 4 to 5% molybdenum and added copper. The copper gives it unusually good resistance to sulphuric and phosphoric acid, and the high nickel resists chloride stress-corrosion cracking.
Exact specification, availability and commercial details are confirmed against your enquiry.
SS 904L Tubes specifications
| Material standard | ASTM B677 / B674 UNS N08904 |
|---|---|
| Grade | SS 904L, UNS N08904, W.Nr 1.4539 |
| Outside diameter | 6 mm to 101.6 mm (1/4" to 4"); other sizes on enquiry |
| Wall thickness | 0.5 mm to 5 mm, or BWG gauge |
| Lengths | Straight lengths up to 6 m standard; longer and U-bent on enquiry |
| Finish | Annealed and pickled, bright annealed, polished |
| Testing | Hydrostatic or eddy current, flattening, flaring, PMI |
| Documents | Mill test certificate to EN 10204 3.1; 3.2 on request |
Equivalent grades
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| SS 904L | N08904 | 1.4539 | X1NiCrMoCu25-20-5 | SUS 890L |
Chemical composition, %
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | Cu | N |
|---|---|---|---|---|---|---|---|---|---|---|
| SS 904L | ≤ 0.020 | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.035 | 19.0 – 23.0 | 23.0 – 28.0 | 4.0 – 5.0 | 1.0 – 2.0 | ≤ 0.10 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | ≥ 490 MPa |
| Yield strength (0.2%) | ≥ 220 MPa |
| Elongation | ≥ 35% |
Values per ASTM B625, annealed. Confirm against the current edition of the standard and your purchase specification.
Density: 7.95 g/cm³
Types we supply
- Seamless
- Welded
- U-bent heat-exchanger tube
- Instrumentation tube
Applications
- Sulphuric and phosphoric acid plant
- Seawater-cooled heat exchangers
- Pulp bleaching equipment
- Pollution-control scrubbers
Questions buyers ask
Which standard covers SS 904L Tubes?
SS 904L Tubes are supplied to ASTM B677 / B674 UNS N08904.
What sizes of SS 904L Tubes does Steel Impex India supply?
Outside diameter: 6 mm to 101.6 mm (1/4" to 4"); other sizes on enquiry. Wall thickness: 0.5 mm to 5 mm, or BWG gauge. Exact availability is confirmed for each enquiry.
Do SS 904L Tubes come with a mill test certificate?
Yes. Material is supplied with a mill test certificate to EN 10204 3.1, traceable to the heat number. Third-party inspection to 3.2 can be arranged on request.
What should I send for a SS 904L Tubes quotation?
Send OD, wall thickness or BWG, length, straight or U-bent, quantity and certificate type.
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, 2nd Kumbharwada, Mumbai 400004, and supplies across India.