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ASTM B677 / ASME SB677 TP904L (UNS N08904) Stainless Steel Seamless Pipe And Tube
ASME SB677 TP904L seamless pipe is made of a high-performance austenitic stainless steel alloy called 904L. This alloy is known for its excellent resistance to corrosion, which are typically used in industries such as chemical processing, seawater, oil and gas, and pharmaceuticals. The high-strength pipes are designed without any welds or seams and are produced via the extrusion process. This gives these modules 20% higher load-bearing capacity when compared to the SS 904L Welded Pipe.
| Standard Specification | ASTM A312, ASTM A213, ASTM B677 |
| Types | ERW, Seamless, Welded, EFW |
| Standard | DIN, JIS, AMS, GB, AISI, ASME, ASTM, EN, GOST |
| Size | OD 1/8" TO 48" SCH 5S TO SCH XXS |
| Surface Finish | Bright, Cold Finish, Annealing, Polished, Pickling |
| Technique | Cold Rolled/Hot Rolled |
| Manufacturing Shapes | Round, Square, Rectangle |
ASME SB 677 UNS N08904 Pipe Equivalent
| Standard | Werkstoff Nr. | Japanese Industrial Standards | Unified Numbering System | European Standards | AFNOR | KS |
|---|---|---|---|---|---|---|
| SS 904L | 1.4539 | SUS 890L | N08904 | 904S13 | Z2 NCDU 25-20 | STS 317J5L |
Chemical composition | ||||||||
| C ≤ % | Si ≤ % | Mn ≤ % | P ≤ % | S ≤ % | Cr % | Mo % | Ni % | V |
| 0,02 | 0,70 | 2,0 | 0,030 | 0,010 | 19,0-21,0 | 4,0-5,0 | 24,0-26,0 | |
| Nb | Ti | Al | Co | Cu % | N ≤ % | Fe | ||
| 1,20-2,00 | 0,15 | |||||||
| in accordance with Key to Steel 2001 | ||||||||
According to ASTM/ASME SB677 Standard (2021 version)
| Alloy | Temper | Tensile Strength min, psi (MPa) | Yield Strength, 0.2% offset min, psi (MPa) | Elongation in 2 in. or 50 mm (or 4D), min,% |
| UNS N08904 | solution annealed | 71 (490) | 31 (220) | 35 |
| UNS N08925 | solution annealed | 87 (600) | 43 (300) | 40 |
| UNS N08926 | solution annealed | 94 (650) | 43 (295) | 35 |
NOTE 1 — The recommended heat treatment shall consist of heating
to a temperature of 1950 to 2100°F (1065 to 1150°C) for UNS
N08904 or
2010 to 2100°F (1100 to 1150°C) for UNS N08925 and UNS N08926,
followed by quenching in water or rapid cooling by other means.
Special characteristics | ||
| Temperature range | Density kg/dm³ | Hardness (HB) |
|---|---|---|
| pressure bomb/pressure vessel - 60°C bis 400°C | 7,9 | ≤ 230 |
| excellent stability against pitting corrosion, stress corrosion and intergranular corrosion | ||
Applications
1. heat exchangers
2. pressure vessels
3. piping systems
4. chemical processing
5. oil and gas industry
6. Offshore engineering
7. pharmaceuticals
8. paper and pulp industry
