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EN S355K2H structural round steel pipe is a structural seamless steel pipe that complies with European standards (EN). Its material is S355K2H. This kind of steel pipe is mainly used for structural parts that bear heavy and dynamic loads, such as bridges, buildings, ships, machinery and other fields.
S355K2H is the grade of steel pipe, where S represents structural steel, 355 represents the yield strength grade of the steel pipe (in MPa), K2 represents the impact toughness grade of the steel pipe, and H represents the welding performance grade of the steel pipe. Specifically, the yield strength of S355K2H steel pipe is not less than 355 MPa, and it also has good impact toughness and welding performance, and can adapt to various complex working environments.
The outer diameter of EN S355K2H seamless structural steel pipes may range from tens of millimeters to several meters, and the wall thickness varies accordingly. The length may vary from a few meters to tens of meters.
Chemical composition percentage of S355K2H steel (1.0576): EN 10219
| Designation | Type of deoxidation | Sub Grop | C % max. Nominal thickness(mm) | Si % max. | Mn % max. | P % max. | S % max. | N % max. | |
|---|---|---|---|---|---|---|---|---|---|
| According to EN10219 | ≤40 | ＞40≤65 | |||||||
| S355K2H | FF | QS | 0.22 | 0.22 | 0.55 | 1.6 | 0.03 | 0.03 | – |
Mechanical properties of S355K2H alloy structural steel pipe
| Steel Grade | Mechanical Properties | Impact Energy (KV J) | ||||
|---|---|---|---|---|---|---|
| Yield Strength | Tensile Strength | Elongation | Test Temperature At Test Temperature of ℃ | |||
| (Mpa) | (Mpa) | (%) | -20 | 0 | 20 | |
| S355K2H | 355 | 510-680 | 22 | 40 | – | – |
Alloy thick wall seamless pipe
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