Stainless Steel U-Bend Tubes: ASTM A213 / A249 / A688, Stress relieved bends. Get quotes from verified suppliers on MetalMitra.
- Stainless Steel U-Bend Tubes
- Heat Exchanger & U-Tubes
- ASTM A213 / A249 / A688
- Stress relieved bends
Your details are never shown publicly. The MetalMitra team reviews every requirement.
Specifications
| Standard | ASTM A213, A249, A688 / ASME SA213, SA688 |
|---|---|
| Grade | 304L, 316L, 321, Duplex 2205 |
| Outside Diameter | 12.7 mm to 38.1 mm |
| Bend Radius | From 1.5 x OD upwards |
| Leg Length | Up to 15 m |
| Heat Treatment | Solution annealed / stress relieved bends |
| Testing | Hydrostatic test after bending |
Grades & standards
- Stainless Steel 304L
- Stainless Steel 316L
- Stainless Steel 321
- Duplex 2205
- ASTM A213
- ASTM A249
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–12.0 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 201 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Ti | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 17.0–19.0 | 9.0–12.0 | 5×(C+N) – 0.70 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 0.14–0.20 |
| Tensile strength, min | 655 MPa |
|---|---|
| Yield strength (0.2%), min | 450 MPa |
| Elongation in 50 mm, min | 25% |
| Hardness, max | 293 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
Source Stainless Steel U-Bend Tubes from verified manufacturers, mills and stockists on MetalMitra. U-bend tubes made from seamless or welded stainless tubing, bent to customer radii with heat-treated bends for tube bundles.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Stainless Steel U-Bend Tubes to ASTM A213.
What you can source
- Straight Tubes — Cut-length heat exchanger and condenser tubes.
- U-Bend Tubes — Tubes bent to radius with stress-relieved bends.
- Finned Tubes — Low-fin and high-fin tubes for improved heat transfer.
- Boiler & Condenser Tubes — Tubes for boilers, condensers and feed-water heaters.
Key properties
- Thermal Efficiency — Thin, uniform walls for efficient heat transfer.
- Tight Tolerances — Close OD and wall tolerances for tube-sheet fit-up.
- Corrosion Resistance — Grade options for cooling water, steam and process fluids.
- Proven Reliability — Hydro and eddy-current tested for leak-free service.
Applications & industries
- Shell & Tube Heat Exchangers
- Condensers
- Feed-Water Heaters
- Boilers
- Refineries
- Power Plants
- Fertiliser Plants
- Sugar Plants
Testing & documentation
Inspection and documentation for Stainless Steel U-Bend Tubes follow ASTM A213, A249 plus any extra requirements in your PO.
- Visual & dimensional inspection
- Hydrostatic test
- Eddy current / NDT test as applicable
- Flattening, flaring and bend tests
- Positive material identification (PMI)
- EN 10204 3.1 Mill Test Certificate
Why source on MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for Stainless Steel U-Bend Tubes with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Shell & Tube Heat Exchangers
- Condensers
- Feed-Water Heaters
- Boilers
- Refineries
- Power Plants
- Fertiliser Plants
- Sugar Plants
- Petrochemical & Refining
- Power Generation
- Chemical Processing
- Desalination
- Fertiliser
- Sugar
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
FAQs
OD, wall thickness, grade, leg length, bend radius and quantity per radius.
Bends are usually solution annealed or stress relieved on request, especially for tight radii.
ASTM A213, A249, A688, A179 and A192 are the most common.
Need Stainless Steel U-Bend Tubes?
Share grade, size, quantity and delivery location. We compare suitable suppliers and come back with a clear quotation.
