| Standard: | ASTM A312， ASME SA312 | Material Grade: | TP904L |
|---|---|---|---|
| Type: | Seamless， Welded， Round Pipe | Thickness: | 1-60mm |
| Outer Diameter: | 6-860mm， Customized | Length: | 6 Meters Or Customized |
| Technique: | Cold Rolled Hot Rolled， Cold Drawn | Applications: | Decoration，Construction，boiler，oil And Gas，electric |
| High Light: | TP904L Stainless Steel Pipe， Chemical Stainless Steel Pipe 630mm， Welded Stainless | ||
ASTM A312 TP904L Large Outside Diameter Stainless Steel Pipe For Chemical Applications
TONG CHUANG 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:
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| 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 | ||
