ASTM A213 TP304L Austenitic Stainless Steel Seamless U Bend Tube
YUHONG Group deals with Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy)seamless and welded pipe and tube already more than 32 years, every year sell more than 80000 tons of steel pipe and tube.
A213 TP304L seamless U-bend tubes are specialized components used primarily in heat exchangers, pressure vessels, and other applications requiring high corrosion resistance and good mechanical properties at elevated temperatures.
Characteristics
1. Corrosion Resistance: TP304L exhibits excellent resistance to a wide range of corrosive environments, including many organic and inorganic chemicals.
2. Temperature Resistance: This material maintains its strength and mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
3. Weldability: The low carbon content enhances the weldability of TP304L, making it a preferred choice for fabrication processes that involve welding.
4. Mechanical Properties: TP304L has good tensile strength and ductility, which allows it to withstand various mechanical stresses in operational environments.
U-Bend Configuration
Shape: The U-bend design allows for efficient heat transfer in applications such as heat exchangers, where space is limited, and effective fluid flow is crucial.
Manufacturing: The seamless U-bend tubes are manufactured without any welded seams, which enhances their structural integrity and reduces the risk of leaks or failures under pressure.
Features :
-'U' bending is done by cold working process.
-'U' bending is done to the required radius as per customer drawings.
-The bend portion and six inch leg is stress relieved by resistance heating.
-Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.
-The radius is checked for its OD and wall thinning with the recommended specification.
-The physical properties and micro-structure is checked at three different position.
Chemical Composition
| Grade | UNS Design | Composition % |
| C | Mn | P | S | Si | Cr | Ni |
| TP304L | S30403 | 0.035 | 2 | 0.045 | 0.03 | 1 | 18.0–20 | 8.0–13 |
304L Equivalent Material
| GRADE | UNS | EN | JIS | AFNOR | BS | WERKSTOFF NR. | GOST |
| SS 304L | S30403 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | Z3CN18‐10 | 304S11 | 1.4306/1.4307 | 03Х18Н11 |
Heat Treatment Requirements
| Grade | UNS Designation | Heat Treat Type | Austenitizing / Solutioning Temperature, min or range °F [°C] | Cooling Media | ASTM Grain Size No. B |
| TP304L | S30403 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | . . . |
Tensile Requirements
| Grade | UNS | Tensile Strength, Min. Ksi [MPa] | Yield Strength, min. Ksi [MPa] | Elongation in 2 in. or 50 mm, min, % A, B | Hardness, Max |
| Designation | Brinell / Vickers | Rockwell |
| TP304L | S30403 | 70 [485] | 25 [170] | 35 | 192HBW/200Hv | 90HB |
ASTM A213 U Tubing Grades:
| Material | ASTM | Equivalent Standard |
| UNS | Grads (TP) | Din (EN) | Afnor (NF) | JIS |
| Austenitic | S30400 | 304 | 1.4301 | Z 6 CN 18.09 | SUS 304 |
| | S30403 | 304L | 1.4306 | Z 2 CN 18.10 | SUS 304L |
| | S31600 | 316 | 1.4401 | Z 6 CND 17.11 | SUS 316 |
| | S31603 | 316L | 1.4404 | Z 2 CND 17.12 | SUS 316L |
| | S31635 | 316Ti | 1.4571 | Z 2 CND 17.12 | – |
| | S32100 | 321 | 1.4541 | Z 6 CNT 18.10 | SUS 321 |
| | S34700 | 347 | 1.455 | Z 6 CNNb 18.10 | SUS 347 |
| | S30409 | 304H | 1.4948 | Z 6 CN 19.10 | SUS 304H |
| | S31609 | 316H | 1.4919 | Z 10 CND 18.10 | SUS 316H |
| | S32109 | 321H | 1.4941 | Z 10 CND 18.10 | SUS 321H |
| Ferritic | S40500 | 405 | 1.4002 | Z 6 CAL 13 | SUS 405 |
| | S41000 | 410 | 1.4002 | Z 12 C 13 | SUS 410 |
| | S43000 | 430 | 1.4016 | Z 10 C 17 | SUS 430 |
| Duplex | S31803 | – | 1.4462 | Z 2 CND 22.06 | – |
| | S32750 | 2507 | 1.4410 | Z 5 CND 20.12 | – |
| | S32760 | – | 1.4501 | – | – |
Applications:
For boilers, heat exchangers, condenser, air-conditioning industry, coolers, solar industry, water heater industry etc.
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ASTM A213 TP304L Austenitic Stainless Steel Seamless U Bend Tube Images
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