Classification of Carbon Steel Elbows

　　ANSI B16.9 Sch40 A234 Wpb Bw Pipe Fitting CS Elbow can be divided into open-hearth steel, converter steel and electric furnace steel according to smelting method; boiling steel, killed steel, semi-killed steel and special killed steel according to deoxidization method; carbon steel can be divided into low-carbon steel, medium-carbon steel and high-carbon steel according to carbon content; carbon steel can be divided into ordinary carbon steel, high-quality carbon steel and high-quality steel according to phosphorus and sulfur content.

　　Generally, the higher the carbon content in carbon steel, the higher the hardness and strength, but the lower the plasticity. Mainly refers to the mechanical properties depend on the carbon content in the steel, and generally do not add a large number of alloy elements in the steel, sometimes also known as plain carbon steel or carbon steel. Carbon steel, also known as carbon steel, refers to iron-carbon alloys with carbon content less than 2%.