What is ASTM A234 WPB?
ASTM A234 WPB refers to Wrought Carbon Steel Pipe Fittings suitable for moderate and high-temperature service. It is the most commonly used material grade for butt-weld fittings such as elbows, tees, reducers, and bends.
Dimensional Specifications (As per ANSI/ASME B16.9)
- W = Wrought
- P = Pressure
- B = It is a grade (B grade is the most commonly used composition)
Some Standard Bend Dimensions (90° Long Radius Bends)
| Nominal Pipe Size (NB) | Outside Diameter (mm) | Center to End (A) mm | Bend Radius (R) | Wall Thickness (SCH 40) |
|---|---|---|---|---|
| 1″ | 33.4 | 38 | 1.5D (50mm) | 3.38 mm |
| 2″ | 60.3 | 76 | 1.5D (90mm) | 3.91 mm |
| 4″ | 114.3 | 152 | 1.5D (170mm) | 6.02 mm |
| 6″ | 168.3 | 228 | 1.5D (250mm) | 7.11 mm |
| 12″ | 323.9 | 457 | 1.5D (490mm) | 10.31 mm |
More sizes available on request. 3D and 5D radius bends also fabricated.
Chemical Composition – ASTM A234 WPB
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.30 |
| Manganese (Mn) | 0.29 – 1.06 |
| Phosphorus (P) | ≤ 0.05 |
| Sulfur (S) | ≤ 0.05 |
| Silicon (Si) | 0.10 – 0.35 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 20% (in 50 mm gauge length) |
| Hardness (Brinell) | ≤ 197 HBW |
Product Range
- Bend Type: 90°, 45°, 180°, Custom Angles
- Radius: Short Radius (SR), Long Radius (LR), 1.5D, 3D, 5D Bends
- Size Range: ½” NB to 24” NB
- Wall Thickness: SCH 20 / SCH 40 / SCH 80 / SCH 160
- End Type: Beveled Ends (as per ASME B16.25), Plain Ends
Check our pricelist of commercial MS bends here: MS Bends pricelist
Testing & Quality Assurance
- Dimensional & Visual Inspection
- Hydro Testing (on request)
- Ultrasonic / Radiography (for special projects)
- Third-Party Inspection (TPI) available
Applications
- Steam & Thermal Piping
- Oil Refineries & Gas Plants
- Boiler & Power Piping
- Chemical Processing
- Water Treatment & Fabrication