Mumbai, India-based Harsh Metalloys is a credible manufacturer and supplier of precision-bent high-quality stainless steel U tubes, which are prized for corrosion resistance, strength, and precision bending. Designed to withstand stringent thermal and mechanical requirements, our stainless steel U tubes are in high demand in heat exchangers, condensers, and boiler systems. Our tubes, made with advanced technology and rigorous quality control, guarantee precise dimensions and high pressure performance. Harsh Metalloys offers specially designed U tube solutions in a range of grades and sizes to suit industry-specific applications in power plants, petrochemical plants, and process industries within India and worldwide.
The U tubes made of stainless steel by Harsh Metalloys are generally made from grades like 304, 304L, 316, and 316L, which contain chromium (18–20%), nickel (8–12%), and molybdenum (2–3% for 316/316L). These U tubes provide high mechanical properties with tensile strength ranging from 500–700 MPa and elongation up to 40%. The U-bend is fabricated without tapering the wall, maintaining tube integrity and promoting even flow. Their corrosion, heat, and pressure resistance make them ideal for use in high-temperature and pressure high-temperature-high-pressure applications in critical heat transfer applications.
| Size Range | 10 mm OD to 50.8 mm OD |
| Stainless Steel U Tube Outside Diameter | 6.00 mm to 101.60 mm |
| Wall Thickness | 0.70 mm to 8.00 mm |
| Length | up to 20 m (65.62 ft) Length & Customed Required Length |
| Stainless Steel Heat Exchanger Tube Dimenisons | ASTM, AISI, ASME/ ANSI, JIS, DIN, EN, GB, BS, SUS |
| Standard | ASTM A 213, A 268, A 269, A 789, Equivalent to ASME, EN, JIS Etc. |
| Stainless Steel U tube Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Ti | Fe | |
| 304 | min. | 18.0 | 8.0 | |||||||||
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||||
| 304L | min. | 18.0 | 8.0 | |||||||||
| max. | 0.030 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 | ||||
| 304H | min. | 0.04 | 18.0 | 8.0 | ||||||||
| max. | 0.010 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | |||||
| SS 310 | 0.015 max | 2 max | 0.015 max | 0.020 max | 0.015 max | 24.00 26.00 | 0.10 max | 19.00 21.00 | 54.7 min | |||
| SS 310S | 0.08 max | 2 max | 1.00 max | 0.045 max | 0.030 max | 24.00 26.00 | 0.75 max | 19.00 21.00 | 53.095 min | |||
| SS 310H | 0.04 0.10 | 2 max | 1.00 max | 0.045 max | 0.030 max | 24.00 26.00 | 19.00 21.00 | 53.885 min | ||||
| 316 | min. | 16.0 | 2.03.0 | 10.0 | ||||||||
| max. | 0.035 | 2.0 | 0.75 | 0.045 | 0.030 | 18.0 | 14.0 | |||||
| 316L | min. | 16.0 | 2.03.0 | 10.0 | ||||||||
| max. | 0.035 | 2.0 | 0.75 | 0.045 | 0.030 | 18.0 | 14.0 | |||||
| 316TI | 0.08 max | 10.00 14.00 | 2.0 max | 0.045 max | 0.030 max | 16.00 18.00 | 0.75 max | 2.00 3.00 | ||||
| 317 | 0.08 max | 2 max | 1 max | 0.045 max | 0.030 max | 18.00 20.00 | 3.00 4.00 | 57.845 min | ||||
| SS 317L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 20.00 | 3.00 4.00 | 11.00 15.00 | 57.89 min | |||
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 19.00 | 9.00 12.00 | 0.10 max | 5(C+N) 0.70 max | |||
| SS 321H | 0.04 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 19.00 | 9.00 12.00 | 0.10 max | 4(C+N) 0.70 max | |||
| 347/ 347H | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 20.00 | 9.0013.00 | |||||
| 410 | min. | 11.5 | ||||||||||
| max. | 0.15 | 1.0 | 1.00 | 0.040 | 0.030 | 13.5 | 0.75 | |||||
| 446 | min. | 23.0 | 0.10 | |||||||||
| max. | 0.2 | 1.5 | 0.75 | 0.040 | 0.030 | 30.0 | 0.50 | 0.25 | ||||
| 904L | min. | 19.0 | 4.00 | 23.00 | 0.10 | |||||||
| max. | 0.20 | 2.00 | 1.00 | 0.045 | 0.035 | 23.0 | 5.00 | 28.00 | 0.25 | |||
| Stainless Steel U tube Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 304/ 304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 304H | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 40 % |
| 310 / 310S / 310H | 7.9 g/cm3 | 1402 °C (2555 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 40 % |
| 306/ 316H | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 316L | 8.0 g/cm3 | 1399 °C (2550 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 317 | 7.9 g/cm3 | 1400 °C (2550 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 321 | 8.0 g/cm3 | 1457 °C (2650 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 347 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi 75000 , MPa 515 | Psi 30000 , MPa 205 | 35 % |
| 904L | 7.95 g/cm3 | 1350 °C (2460 °F) | Psi 71000 , MPa 490 | Psi 32000 , MPa 220 | 35 % |
Contact us to get a quick quote for your requirement.
To maintain Stainless Steel U Tubes, regularly clean them with mild soap and water to remove dirt and grime. Avoid harsh chemicals and abrasive cleaners. Inspect for signs of corrosion or damage and address any issues promptly.
Stainless Steel U Tubes are highly resistant to corrosion due to their chromium content. However, under extreme conditions like exposure to harsh chemicals or saltwater, corrosion can still occur over time.
Yes, Stainless Steel U Tubes can be used for natural gas applications. They offer excellent corrosion resistance and durability, making them suitable for handling natural gas in various industrial systems.
Stainless steel U tubes find broad application in applications that involve high efficiency in heat transfer and corrosion resistance. They are key elements in heat exchangers, condensers, boilers, and superheaters in industries like power generation, petrochemicals, oil & gas, and marine engineering. Their compact U-shape design offers compact heat exchange systems and easy maintenance through fewer connection points. They operate efficiently at varied temperatures and pressures and are most suitable for steam and liquid processing. Harsh Metalloys provides tailored lengths, bend radii, and specifications to address varied industrial requirements with accuracy and consistency.
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