Stainless Steel Seamless U Bend Boiler Tube ASTM A213 TP304 1.4301
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.
Our client already cover more than 65 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Korea, Singapore, Austrial, Poland, France , ....
And our group branch company and factory have been already approved by :ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.
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 |
| TP304 | S30400 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18.0–20 | 8.0–11 |
| TP304L | S30403 | 0.035 | 2 | 0.045 | 0.03 | 1 | 18.0–20 | 8.0–13 |
| TP304H | S30409 | 0.04 – 0.1 | 2 | 0.045 | 0.03 | 1 | 18.0–20 | 8.0–11 |
Heat Treatment Requirements:
| Grade | UNS Designation | Heat Treat Type | Austenitizing / Solutioning Temperature, min or range °F [°C] | Cooling Media | ASTM Grain Size No. B |
| TP304 | S30400 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | . . . |
| TP304L | S30403 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | . . . |
| TP304H | S30409 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | 7 |
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 |
| TP304 | S30400 | 75 [515] | 30 [205] | 35 | 192HBW/200Hv | 90HB |
| TP304L | S30403 | 70 [485] | 25 [170] | 35 | 192HBW/200Hv | 90HB |
| TP304H | S30409 | 75 [515] | 30 [205] | 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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Stainless Steel Seamless U Bend Boiler Tube ASTM A213 TP304 1.4301 Images
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