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Hot-rolled carbon steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes, etc.Carbon steel straight seam steel pipes are made of carbon steel. Carbon steel is also called carbon steel. It refers to iron-carbon alloys with a carbon content of Wc less than 2.11%. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, phosphorus. Generally, the higher the carbon content of carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity.