ASTM A252 Grade B LSAW Pipe
ASTM A252 Grade B LSAW Pipe: Properties, Equivalents & Applications
Comprehensive material data for ASTM A252 Grade B LSAW pipe: chemical composition, mechanical properties, thermal properties, international equivalents, and application guide for steel pipe piles.
LSAW, Hot Rolled Plate Forming, Submerged Arc Welding, Optional Normalizing
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
ASTM A252 Grade B LSAW Pipe Introduction
ASTM A252 Grade B LSAW pipe is a carbon steel pipe pile produced by longitudinal submerged arc welding (LSAW) from hot-rolled plates. It is classified under ASTM A252 standard for welded and seamless steel pipe piles. Grade B (also referenced as Grade 2) offers minimum yield strength of 240 MPa (35 ksi) and minimum tensile strength of 415 MPa (60 ksi), providing a good balance of strength and weldability.
- Commonly used for structural piling, foundation support, and marine structures.
- LSAW manufacturing ensures uniform wall thickness and high dimensional accuracy.
- Non-severe chemical composition limits ensure good toughness and field weldability.
This material is suitable for driving piles into various soil conditions and can withstand dynamic loading during installation. It is supplied in pipes with typical diameters from 16 inches (406.4 mm) to 100 inches (2540 mm) and wall thicknesses up to 1 inch (25.4 mm). The pipe can be delivered as-welded or with normalization heat treatment when specified.
ASTM A252 Grade B LSAW Pipe Chemical Composition
ASTM A252 Grade B (Grade 2) specifies maximum limits for chemical composition to ensure weldability. The actual composition may be adjusted by the manufacturer within these limits.
- Carbon equivalent is not prescribed but typically controlled to meet field welding requirements.
- Other residual elements (Cu, Ni, Cr, Mo) are permitted but total content shall not exceed 0.50%.
| Chemical Element | Standard Value (wt. %) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.26 | Maximum |
| Manganese (Mn) | ≤ 1.35 | Maximum |
| Phosphorus (P) | ≤ 0.035 | Maximum |
| Sulfur (S) | ≤ 0.035 | Maximum |
ASTM A252 Grade B LSAW Pipe Thermal & Electrical Physical Properties
The following physical properties are typical values for carbon steel at room temperature and ambient pressure. They are not specified in ASTM A252 but are provided for design reference.
- Values may vary slightly with exact composition and temperature.
| Property | Typical Value | Unit | Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20°C |
| Modulus of Elasticity (E) | 205 | GPa | Room temperature |
| Shear Modulus (G) | 80 | GPa | Room temperature |
| Poisson's Ratio (ν) | 0.29 | - | Room temperature |
| Thermal Expansion Coefficient (α) | 12.2 | x10⁻⁶/K | 20-100°C |
| Thermal Conductivity (λ) | 50 | W/(m·K) | 20°C |
| Specific Heat Capacity | 460 | J/(kg·K) | 20°C |
| Electrical Resistivity (ρₑ) | 0.15 | µΩ·m | 20°C |
ASTM A252 Grade B LSAW Pipe Mechanical Properties
Mechanical properties for ASTM A252 Grade B are determined on test specimens taken from the pipe wall. Tensile testing is performed in accordance with ASTM A370. Coupon orientation can be longitudinal or transverse. Minimum elongation varies with specimen orientation and wall thickness.
| Property | Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 240 | MPa | Room temperature; any orientation |
| Tensile Strength (Rm) | ≥ 415 | MPa | Room temperature; any orientation |
| Elongation (A) | ≥ 22 | % | Gauge length 50 mm (2 in); longitudinal strip specimen; wall thickness ≤ 7.94 mm (5/16 in) |
| Elongation (A) | ≥ 25 | % | Gauge length 50 mm; longitudinal strip specimen; wall thickness > 7.94 mm |
| Elongation (A) | ≥ 18 | % | Gauge length 50 mm; transverse strip specimen; wall thickness ≤ 7.94 mm (when specified) |
| Elongation (A) | ≥ 22 | % | Gauge length 50 mm; transverse strip specimen; wall thickness > 7.94 mm (when specified) |
| Bend Test (when required) | No cracking | - | 180° bend around pin diameter = 3 x wall thickness; room temperature |
ASTM A252 Grade B LSAW Pipe Exact Equivalent Standards/Substitute Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International | - | - | No direct exact equivalent available. See similar grades for substitution. |
ASTM A252 Grade B LSAW Pipe Application Introduction
ASTM A252 Grade B LSAW pipe is primarily used in deep foundation applications. Its mechanical properties provide reliable load-bearing capacity in soil and marine environments.
- Products include bearing piles, fender piles, and combination wall pipes.
- Industries served: civil engineering, marine construction, bridge building, port and harbor development.
- Components: pile shoes, splices, connectors, pile caps, and bracing elements can be fabricated from the same pipe or attached.
Product Applications: Steel pipe bearing piles, Bridge substructure piles, Retaining wall piles, Dolphin piles, Anchor piles
Processed into products: Pile pipe body, Pile tip (shoe), Pile splice sleeve, Connecting flanges, Cutting shoe, Pile cap reinforcement
Application industries: Civil Engineering, Marine & Offshore Construction, Bridge Foundation, Port & Harbor, Structural Supports
ASTM A252 Grade B LSAW Pipe Similar/Alternative Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International | API 5L (PSL1) | Grade B | Similar yield (~241 MPa) and tensile (414 MPa); intended for line pipe, may substitute for structural piling with caution. |
| Europe | EN 10219-1 | S275J2H | Minimum yield 275 MPa, tensile 410 MPa; cold-formed structural hollow section with impact properties at -20°C. |
| Japan | JIS A5525 | SPP290 | Pipe pile with min. yield 290 MPa; higher strength, weldable; chemistry slightly different. |
| China | GB/T 700 | Q235B | General carbon structural steel with yield ~235 MPa; pipe can be formed for piles but not in standard pipe pile form. |
Notes:
When ordering, specify required length, diameter, wall thickness, end finish, and whether normalization is needed. The pipe may be supplied with mill test certificates (EN 10204 3.1 or 3.2). Surface protection (coating) is not covered by ASTM A252 and should be specified separately.
- Share
