ASTM A252 Grade 3 Pipes Carbon Steel Pipes for Structural Applications description
Based on the ASTM A252 standard and engineering practice, A252 GR3 structural pipe is a straight seam welded steel pipe specifically designed for heavy-duty pile foundations. Its core positioning and characteristics are as follows:
Essential Definition
Identity: Straight seam submerged arc welded pipe (SAWL) conforming to the ASTM A252 Grade 3 standard
Core Application: As a permanent load-bearing structural component, used in extreme load scenarios such as super high-rise buildings and cross-sea projects
Performance Label: The highest strength grade in the current ASTM A252 standard (superior to GR2/GR1)
ASTM A252 GR3 Mechanical Properties
| STEEL GRADE | Yield strength, min. psi (MPa) | Tensil strength, min. psi (MPa) | Elongation in 2 in., min. % |
| GRADE 3 | 45,000 (310) | 66,000 (455) | 20% |
Thickness of ASTM A252 Grade 3 Steel Line Pipe
Core Performance Advantages of ASTM A252 GR3 (vs. GR2)
| Parameter | GR3 Specification | Improvement vs. GR2 | Engineering Value |
|---|---|---|---|
| Yield Strength | ≥345 MPa | ↑19% | Supports foundations of 100m+ skyscrapers |
| Tensile Strength | ≥485 MPa | ↑17% | Resists deformation from earthquakes/typhoons |
| Low-Temperature Toughness | Passes -20°C Impact Test | New mandatory requirement | Essential for polar/permafrost projects |
| Applicable Pile Depth | 40-100 meters | Double the depth range | Reduces pile quantity, cuts overall costs |
ASTM A252 GR3 Steel Pipe Testing
Hydrostatic Testing: Not specified.
Number of Tests: One tensile test per 200 lengths.
Mechanical Tests: Tensile Test: Either longitudinal or transverse at option of manufacturer
Packaging and shipping
