China S690QL de acero mild carbon steel

The development S690QL de acero of the company comes from the resource advantage, service advantage, logistics advantage and brand advantage established over the years, and it is also inseparable from the full support of new and old customers. We will uphold the support of all sectors of society, actively provide users with S690QL de acero high-quality and efficient services, work together for win-win, and create a better tomorrow!

The carbon S690QL de acero content of the pipeline steel is required to be low, and the strength of the pipeline steel is ensured by increasing the manganese content and adding trace elements such as niobium, titanium, vanadium and molybdenum. For pipeline steel, in addition to the required strength and plasticity index, the requirement for toughness index is an outstanding feature, including the impact energy of pipeline steel plate, impact transition temperature and toughness index of welding heat affected zone and welding metal. In addition, there are requirements for strain aging, weldability, stress corrosion and other indicators.

After quenching and tempering, 40Cr alloy steel plate and S690QL de acero sheet have good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel S690QL de acero is good. It can be hardened to Ф28 ～ 60mm during water quenching and Ф15 ～ 40mm during oil quenching. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is better. When the hardness is HB174 ～ 229, the relative cutting workability is 60%. 40Cr alloy steel is suitable for making medium-sized plastic molds.

TMCP process is an indispensable technology for our production of low alloy high strength wide and S690QL de acero thick steel plates. TMCP process can produce steel with high strength and toughness without adding too many alloy elements and complex subsequent heat treatment. TMCP is a process that can save alloy S690QL de acero and energy and is beneficial to environmental protection. A lot of our shipbuilding steel plates are produced by TMCP process.

"SA572 Grade 55 [380] steel chemical composition(%)Carbon max.: 0.26Manganese max.: 1.35Phosphorus Max.: 0.030Sulfur Max.: 0.030Silicon max.: 0.40S690QL de acero, SA572 Grade 55 [380] steel mechanical propertiesTensile strength min. MPa: 380Yield strength min. MPa: 485Elongation % min. in 200mm : 17Elongation % min. in 50mm : 20"

The results of adopting two-level S690QL de acero service system and implementing standardized management are mainly reflected in the formation of vigorous work style such as quick response and quick action. Our company's customer service center stipulates that employees must be accurate and quick in technical support and S690QL de acero after-sales service. Through the formation of this fast, agile, vigorous style, to provide users with satisfactory service.