What is the yield strength of astm a252 grade 3 steel pipe
The mechanical properties and yield strength of ASTM A252 Gr.3 steel pipe are as follows:
| Wall Thickness t mm |
Tensile Strength σb Mpa |
Yield point σs Mpa |
Elongation or Elongation After Fracture δ % |
|---|---|---|---|
| Seamless welded pipe | ≥455 | ≥310 | |
| Seamless welded pipe;t≥7.9 | ≥20 | ||
| Seamless welded pipe;t=7.1 | ≥19 | ||
| Seamless welded pipe;t=6.4 | ≥18 | ||
| Seamless welded pipe;t=5.6 | ≥17 | ||
| Seamless welded pipe;t=4.8 | ≥16 | ||
| Seamless welded pipe;t=4.4 | ≥15.5 | ||
| Seamless welded pipe;t=4 | ≥15 | ||
| Seamless welded pipe;t=3.6 | ≥14.5 | ||
| Seamless welded pipe;t=3.2 | ≥14 | ||
| Seamless welded pipe;t=2.8 | ≥13.5 |
What is the equivalent material of A252 GR3 steel pipe?
| Standard Type | Grade | Standard | Core matching basis |
|---|---|---|---|
| GB | Q345B | GB/T 1591 | Mechanical properties (yield strength ≥ 345MPa) and weldability match more than 95%, the same as pile foundation structural steel |
| EN | S355J2H | EN 10210 | The tensile strength (470-630MPa) and yield strength (≥355MPa) overlap with the Gr.3 parameters and are suitable for load-bearing structures. |
| JIS | STK490 | JIS G 3444 | Special steel pipe for pile foundation, with a lower limit of tensile strength of 490MPa, covering Gr.3 requirements (420-550MPa) |
Replacement Notes
Certification Differences:
European standard S355J2H must comply with the impact test requirements of EN 10210 (-20℃ Charpy V);
Japanese standard STK490 must meet the flattening test and non-destructive testing clauses of JIS G 3444.
Corrosion Reinforcement:
European standard S355J2H+hot-dip galvanizing combination is preferred in marine environments, and the salt spray resistance life is increased by 40%;
Japanese standard STK490 requires additional coating treatment to match the outdoor durability of Gr.3.
Applications
| Standard Type | Applicable engineering fields | Restrictions |
|---|---|---|
| EN | Nordic bridge pile foundation, offshore platform support structure | For extremely cold conditions (<-40℃), select S355K2H |
| JIS | Pipe piles and earthquake-resistant support systems for high-rise buildings in Japan | Dynamic loading requires supplementary fatigue testing |
| GB | Domestic port terminals, high-speed rail hub load-bearing piles | Corrosive environment requires galvanizing |
