ASTM A312 TP904L Large Outside Diameter Stainless Steel Pipe For
Chemical Applications YUHONG HOLDING GROUP has been operating seamless / welded pipes and tubes for
austenitic stainless steel and nickel alloy steels (Hastelloy,
Monel, Inconel, Inkoloy) for more than 30 years, and
exports steel tubes & pipes, fittings and flanges every
year of more than 80,000 tons. Our customers have covered more than
50 countries all over the world. Material 1.4539(alloy 904L) is an austenitic special steel with
high molybdenum content, high copper content and very low carbon
content. Our product range in 1.4539 are tubes and pipes, fittings and
flanges, accessories. 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 Test:
- Eddy Current Testing
- O.P Testing
- Radiography Testing
| - Corrosion Testing
- Micro Testing
- Macro Testing
| - IGC Testing
- Ultrasonic testing
- Liquid Penetrate testing
|
| 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 | 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 |
|
