BBN p235gh pipe mechanical properties steel factory

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The sulfur element (S element) comes from the ore and fuel coke of steelmaking. It is a harmful element in P235GH pipe etc. steel. Sulfur exists in steel in the form of iron sulfide (FeS). FeS and Fe form a low melting point (985℃) compound. The hot working temperature of steel is generally above 1150 - 1200℃, so when the steel is hot working, the premature melting of FeS compound causes the workpiece to crack, which is called "hot brittleness". It reduces ductility and toughness of steel and causes cracks during forging and rolling. Sulfur is also detrimental to welding performance and reduces corrosion resistance.

SA299 steel plate is C-Mn-Si steel used as boiler and pressure vessel plate in ASME standard. It is generally used for various welded parts whose working temperature does not exceed 400℃, such as boiler steam drums, pressure vessels, etc. p235gh pipe, SA299 steel is required to have a high medium temperature strength, good plasticity, heat treatment process performance and welding process performance.

In 2020, the National Development and Reform Commission and the Ministry of Justice issued the "Opinions on Accelerating the Establishment of Green Production and Consumption Regulations and Policies", which proposed the implementation of green design, strengthening of industrial clean production, development of industrial circular economy, strengthening of industrial pollution control, promotion of clean energy development, and promotion Green development of agriculture, promotion of green development of service industry, expansion of green product consumption, promotion of green lifestyle, and many other tasks.