What features do API 5L X42 PSL1 pipeline steel have

What features do API 5L X42 PSL1 pipeline steel have?
(1) High strength. The strength indicators of API 5L X42 PSL1 pipeline steel mainly include tensile strength and yield strength. While high strength is required, the yield strength ratio (ratio of yield strength to tensile strength) of API 5L X42 PSL1 pipeline steel is also proposed, generally in the range of 0.85 to 0.93.

(2) High impact toughness. API 5L X42 PSL1 pipeline steel requires that the material should have a sufficiently high impact toughness (cracking, crack arrest toughness). For the base material, when the toughness value of the material meets the requirements for crack arrest, its toughness can generally meet the requirements for preventing cracking.

(3) Low ductile-brittle transition temperature. Severe geographical and climatic conditions require API 5L X42 PSL1 pipeline steel to have a sufficiently low ductile-brittle transition temperature.

(4) API 5L X42 PSL1 pipeline steel has excellent resistance to hydrogen induced cracking (HIC) and sulfide stress corrosion cracking (SSCC).

(5) Good welding performance. The good weldability of API 5L X42 PSL1 pipeline steel is essential to ensure the integrity of the pipeline and the quality of field welding. One of the most significant characteristics of the development of API 5L X42 PSL1 pipeline steel in modern times is the continuous reduction of carbon content in steel. With the decrease of carbon content, the weldability of steel has been significantly improved. The addition of a small amount of titanium can suppress the decrease of the toughness of the welding affected zone and achieve the purpose of improving the welding performance. The difficulty and focus is high toughness. With the continuous development of oil and natural gas transportation, the performance requirements of Petroleum API 5L X42 PSL1 pipeline steel continue to increase, especially the toughness requirements.