What is the material of EN 10219 S355J2H welded pipe?
EN 10219 S355J2H welded pipe is a high-strength low-alloy fine-grained structure steel welded pipe, mainly used in building structures (such as high-rise buildings, bridges), mechanical manufacturing (such as ships, vehicles), and low-temperature engineering (such as containers, pipelines).
What is the chemical composition of EN 10219 S355J2H welded pipe?
| Composition | Content Range(wt%) |
Key points of control |
|---|---|---|
| C | ≤0.22% |
Balancing strength and weldability to reduce the risk of cold cracking |
| Mn | ≤1.60% |
Improve toughness and strength, optimize hot working properties |
| P | ≤0.025% |
Strictly control impurities to prevent low-temperature brittleness. |
| S | ≤0.025% |
Reduce thermal brittleness and prevent weld cracking |
| Si | ≤0.55% |
Deoxidizer, enhances corrosion resistance |
|
Microalloy |
Nb,V,Ti etc. |
Refine grain size and improve overall performance |
What are the mechanical properties of EN10219-1 S355J2H welded pipes?
|
Parameters |
Requirement Value |
|---|---|
|
Yield strength |
≥355 MPa |
|
Tensile strength |
470–630 MPa |
| Elongation | ≥22%(Gauge length 5.65√S₀) |
| Impact Toughness | -20°C longitudinal impact energy ≥ 27J |
What is en 10219 S355J2H equivalent to?
| Standard | Grade |
Key Differences Explained |
|---|---|---|
| ASTM | ASTM A572 Gr50 |
Yield strength ≥ 345 MPa (slightly lower than S355J2H) |
| API 5L Gr.B |
Focusing on pipeline applications, with similar compositions |
|
| JIS | JIS G3445 STK490 |
Yield strength ≥ 355 MPa, elongation ≥ 17% |
| GB | GB/T 1591 Q355ND |
Slightly wider phosphorus-sulfur control (P/S ≤ 0.030%) |
