S235JRH Structural Longitudinal Spiral Submerged Arc Welded Pipe
S235JRH Structural Spiral Submerged Arc Welded Pipe Product Introduction
EN 10210 S235JRH (BS EN 10210 S235JRH) is a hot-rolled hollow steel structural pipe with a wall thickness ≤16mm, a minimum yield strength of 235MPa, and a minimum impact strength of 27J at 20℃. Its cross-sectional shapes include circular, square, rectangular, and elliptical. The steel part number is 1.0039.
EN 10210 S235JRH is completely equivalent to BS EN 10210 S235JRH. All the following material requirements apply to both standards.
S235JRH Structural Spiral Welded Pipe Chemical Components
| Chemical composition - Cast analysis for product thickness ≤ 120 mm | ||||||||
| Steel grade | Type of deoxidation a |
% by mass, maximum | ||||||
| C | Si | Mn | P | S | N b c | |||
| Specified thickness (mm) | ||||||||
| ≤40 | >40≤120 | |||||||
| S235JRH | FN | 0.17 | 0.20 | - | 1.40 | 0.040 | 0.040 | 0.009 |
a FN =Rimming steel not permitted
b It is permissible to exceed the specified values provided that for each increase of 0.001 % N the P max. content is also reduced by 0.005 %. The N content of the cast analysis, however, shall not be more than 0.012 %.
c The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0.020 %with a minimum Al/N ratio of 2:1, or if sufficient other N-binding elements are present. The N-binding elements shall be recorded in the inspection Document.
S235JRH Structural Spiral Welded Pipe Impact Requirement
EN 10210 S235JRH may exhibit brittleness at low temperatures, so special care needs to be taken when using it in cold environments to ensure that the material has adequate impact toughness.
| Steel name | Minimum impact energy KV d, J | ||
| At test temperature of | |||
| -20℃ | 0℃ | 20℃ | |
| S235JRH | - | - | 27 |
d For impact properties for reduced section test pieces see 6.6.2.
Manufacturing Process of S235JRH Structural Spiral Submerged Arc Welded Pipe
The S235JRH structural spiral submerged arc welded pipe is formed using hot-rolled steel strip through spiral winding and submerged arc welding. First, the steel strip is continuously rolled at a specific forming angle to form a pipe. Then, full penetration welding is achieved through double-sided submerged arc welding, resulting in a dense metallurgical bond under flux protection. After forming, processes such as sizing and straightening, non-destructive testing, and hydrostatic testing are performed to ensure the dimensional accuracy and structural strength of the pipe, ultimately creating a spiral welded pipe suitable for load-bearing building structures.
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