ASTM A335 P11 ElbowASTM A234 · ASME B16.9 · Manufacturer, trader & exporter, India
SA-335 P11 · 1¼Cr-½Mo alloy pipe
An ASTM A335 P11 elbow is a fitting that changes the direction of a pipe run, for use with ASTM A335 P11 pipe. ASTM A335 P11 itself is a pipe or plate specification, so the matching elbow is made to ASTM A234 WP11 (buttweld) · ASTM A182 F11 (forged) — which is what we supply for P11 lines. Elbows come in 45°, 90° and 180° (return) angles. Long-radius (1.5D) is the default for flow; short-radius (1D) saves space. Buttweld elbows follow ASME B16.9; socket-weld and threaded elbows follow ASME B16.11.
- ASTM A234
- ASME B16.9
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an ASTM A335 P11 Elbow?
- What it is
- A fitting that changes the direction of a pipe run
- Material
- ASTM A234 WP11 (buttweld) · ASTM A182 F11 (forged)
- Dimensions
- ASME B16.9 · B16.11
- Grade
- ASTM A335 P11
- Best at
- Steam and hot-oil piping up to about 550 °C
ASTM A335 P11 Elbow Specification
| Product | ASTM A335 P11 Elbow |
|---|---|
| Material standard | ASTM A234 WP11 (buttweld) · ASTM A182 F11 (forged) |
| Dimensional standard | ASME B16.9 · B16.11 |
| Sizes | Buttweld ½" – 48" · forged ⅛" – 4" |
| Wall / class | Schedule to match pipe · Class 3000 / 6000 (forged) |
| Ends | Bevelled to ASME B16.25 |
| Testing | Chemical & mechanical per heat · NDT · impact where specified |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose an Elbow
Elbows come in 45°, 90° and 180° (return) angles. Long-radius (1.5D) is the default for flow; short-radius (1D) saves space. Buttweld elbows follow ASME B16.9; socket-weld and threaded elbows follow ASME B16.11.
- LR (1.5D) and SR (1D) radius
- 45°, 90° and 180° return
- Seamless or welded construction
More on choosing: Elbow guide.
ASTM A335 P11 Elbow: Why P11 for elbows
Elbows come in 45°, 90° and 180° (return) angles. Long-radius (1.5D) is the default for flow; short-radius (1D) saves space. Buttweld elbows follow ASME B16.9; socket-weld and threaded elbows follow ASME B16.11. In ASTM A335 P11, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Carbon and low-alloy fittings suit hydrocarbon, steam and utility lines. ASTM A335 P11 is picked for steam and hot-oil piping up to about 550 °C. |
|---|---|
| Typical service | Power plants — Main steam and reheat lines. |
| Welding to carbon steel | Matching carbon or low-alloy filler is used; joints to stainless need ER309L |
| Matching filler | ER80S-B2 / E8018-B2 |
ASTM A335 P11 Elbow Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Molybdenum | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Phosphorus | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A335 Grade P11.
ASTM A335 P11 Elbow Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A335 Grade P11 — condition per order.
Full chemistry, properties and equivalents are on the ASTM A335 P11 grade page.
Other ASTM A335 P11 pipe fittings
ASTM A335 P11 Elbow dimensions — ASME B16.9
Values in mm, the same for every material; the wall thickness matches the pipe schedule.
| NPS | OD | 90° LR elbow A | 45° elbow B | 90° SR elbow |
|---|---|---|---|---|
| ½" | 21.3 | 38 | 16 | — |
| ¾" | 26.7 | 38 | 19 | — |
| 1" | 33.4 | 38 | 22 | 25 |
| 1½" | 48.3 | 57 | 29 | 38 |
| 2" | 60.3 | 76 | 35 | 51 |
| 3" | 88.9 | 114 | 51 | 76 |
| 4" | 114.3 | 152 | 64 | 102 |
| 6" | 168.3 | 229 | 95 | 152 |
| 8" | 219.1 | 305 | 127 | 203 |
| 10" | 273.1 | 381 | 159 | 254 |
| 12" | 323.9 | 457 | 190 | 305 |
| 16" | 406.4 | 610 | 254 | 406 |
| 20" | 508.0 | 762 | 318 | 508 |
| 24" | 610.0 | 914 | 381 | 610 |
Full chart: ASME B16.9 fitting dimensions.
ASTM A335 P11 Elbow — questions buyers ask
Long radius or short radius elbow?
Long radius gives lower pressure drop and is the default. Short radius is used where space is tight, with a small pressure-rating reduction per ASME B16.9.
Can ASTM A335 P11 elbows be welded to carbon steel?
Yes — matching carbon or low-alloy filler is used; joints to stainless need ER309L.
Which standard covers ASTM A335 P11 elbows?
The material is ASTM A234 WP11 (buttweld) · ASTM A182 F11 (forged); dimensions follow ASME B16.9 · B16.11. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a ASTM A335 P11 elbow?
The steel price, the size and schedule or class, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026