| 摘要 |
The invention relates to a steel having a high mechanical strength at ambient temperature and at temperatures up to 130°C, high toughness, resistance to corrosion in the base metal and resistance to cracks in the heat-affected zone (HAZ) once the tube is welded. More specifically, the invention relates to a seamless steel tube comprising a thick wall and having high mechanical strength, high toughness and resistance to corrosion, which is known as a guide pipe with a catenary configuration. The invention is advantageous in relation to prior art in that it provides a chemical composition for steel which is used to produce a thick seamless steel tube having high mechanical resistance, good toughness, good HAZ fracture toughness and good resistance to corrosion, and a production method that can be used to produce same The aforementioned advantages are based on the use of a composition that contains basically Pe and a specific chemical composition. |
