Description
ASTM A252 Grade 1 pipe piles are low-carbon steel pipe piles manufactured according to the ASTM A252 standard for welded and seamless steel pipe piles. They are mainly used for building and structural support applications such as the foundations of bridges, buildings, roads, and marine structures where loads are moderate. Grade 1 is the entry-level strength grade, offering excellent weldability and the lowest cost in the A252 family.
Specification
| Parameter | Value |
|---|---|
| Standard | ASTM A252 |
| Type | ERW welded or seamless steel pipe piles |
| Size | NPS 1 to NPS 24, or as required |
| Outside diameter | 33.4 to 609.6 mm |
| Wall thickness | 3 to 12 mm |
| Length | 3 to 18 m, or as required |
| Ends | Plain for small sizes, beveled for large sizes |
| Surface | Bare or black varnish |
Yield Strength and Composition
The minimum yield strength of Grade 1 is 30,000 psi, about 205 MPa, with a minimum tensile strength of 310 MPa. Carbon is limited to 0.26 percent, manganese to 1.60 percent, and phosphorus and sulfur to 0.05 percent each. The low carbon and alloy content give excellent weldability, important for field splicing of piles.
Grade Comparison
Grade 1 has a minimum yield of 205 MPa and tensile of 310 MPa; Grade 2 has 240 MPa and 414 MPa; and Grade 3 has 310 MPa and 455 MPa. Grade 1 is the most economical for light-duty piling, temporary structures, and low-load applications, while Grade 3 is specified for heavy-duty piling and deep foundations where maximum load capacity per pile is required.
Applications
Grade 1 piles are used for light-duty piling supporting small buildings, storage sheds, and residential decks; temporary structures such as formwork support during bridge or building construction; low-load applications such as fence and guardrail posts and highway sign supports; small-scale docks and erosion control in calm water; and agricultural structures such as grain bins and equipment shelters.
Frequently Asked Questions
Q: What is the yield strength of A252 Grade 1?
A: The minimum yield strength is 30,000 psi, about 205 MPa, with a minimum tensile strength of 310 MPa.
Q: What is the difference between Grades 1, 2, and 3?
A: The grades provide increasing yield strength of 205, 240, and 310 MPa respectively for increasing load requirements.
Q: What sizes are available?
A> Outside diameters from 33.4 to 609.6 mm with wall thicknesses from 3 to 12 mm and lengths from 3 to 18 m.
Q: Is Grade 1 weldable?
A: Yes, the low carbon and alloy content give excellent weldability for field splicing.
Q: What is the difference between A252 Gr1 and A139 GrB?
A: A252 Gr1 has lower carbon and no explicit manganese or silicon requirement, while A139 GrB specifies higher manganese and silicon for stronger welded pipe.
Q: When should Grade 1 be chosen?
A: For light loads, temporary structures, and cost-sensitive projects where Grade 2 or 3 strength is not required.
For ASTM A252 Grade 1 pipe pile quotations with your required size and length, contact our sales team.
