ASTM A312 TP904L Large OD Steel Pipe, UNS NO8904 / 1.4539, 100%UT AND ET
ASTM A312 TP904L Alloy 904/N08904 (1.4539) Large OD Steel Pipe
Yuhong Special Steel has been dealing in seamless pipes and tubes of austenitic stainless steel and nickel alloy steel (Hastelloy, Monel, Inconel, Inkoloy) for more than 25 years, and has sales of steel pipes every year. Over 80,000 tons. Our customers have covered more than 45 countries including Italy, Britain, Germany, the United States, Canada, Chile, Colombia, Saudi Arabia, South Korea, Poland, Singapore, Australia, France, etc.
Originally intended for those applications involving dilute sulfuric acid, 904l stainless steel tubing is widely used in the chemical processing industry. Specifically, stainless steel 904l pipe or also known as UNS N08904, used in the production of phosphate based fertilizers. 904l seamless pipe is considered a super austenitic stainless grade with added molybdenum and copper content in its alloy to enhance its mechanical or corrosion resistance.
Description
Material 1.4539 (Alloy 904L) is an austenitic special steel with high molybdenum, high copper and very low carbon content.
Our product range in 1.4539 includes pipes, fittings and flanges, fittings.
Some of the quality tests carried out by our quality department includes:
| Corrosion Test | Only when specifically requested by the customer |
| Chemical Analysis | Conduct tests according to required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Fully compliant with relevant standards and ASTM A-450 and A-530 specifications, ensuring trouble-free extension, welding and use on the client side |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% hydrostatic test, check pipe leaks according to ASTM A 450 specification, the maximum pressure we can support is 20Mpa/7s. |
| Air Under Pressure Test | Check for any signs of air leakage |
| Visual Inspection | After passivation, each tube is subjected to a thorough visual inspection by trained personnel to detect surface defects and other defects |
Supplementary Testing : In addition to the above tests, we also carry out supplementary tests on finished products. Tests carried out in this regard include:
|
|
|
| Material No. | 1.4539 |
|---|---|
| EN Symbol (short) | X1NiCrMoCu25-20-5 |
| AISI/SAE | — |
| UNS | N08904 |
| AFNOR | Z 2 NCDU 25-20 |
| B.S. | — |
| Alloy | alloy 904L |
| Registered work's label | — |
| Normen | VdTÜV 421 , SEW 400 |
Chemical composition ¹ |
||||||||
| 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 | |||||||
| ¹ in accordance with Key to Steel 2001 | ||||||||
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 | ||
Welding filler |
| 1.4539, 1.4519 |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.