What is the role of carbon in carbon steel pipe performance

The role of carbon in carbon steel pipe performance:

Carbon (C): the carbon content in steel, yield point and tensile strength increased but the ductility and impact resistance to reduce carbon content of 0.23% over the deterioration of weldability, so for the welding of low alloy structural steel pipe, the carbon content is generally not more than 0.20%.

The high carbon content also reduces the steel resistant to atmospheric corrosion in the open yard of high-carbon steel is easily corroded; In addition, the carbon can increase the cold brittleness and aging sensitivity of the steel. Ordinary material seamless steel pipe for alloy steel pipe is easy to rust.