ASTM A333GR6 STEEL PIPE

Standard definition
ASTM A333/A333M is a standard developed by the American Society for Materials and Testing (ASTM) for seamless and welded steel pipes for cryogenic service. GR6 (Grade 6) is one of the grades in this standard, and this steel pipe is mainly designed for fluid transport in low temperature environments.
Chemical composition
Its chemical composition mainly includes carbon (C), manganese (Mn), phosphorus (P), sulfur (S) and other elements. The carbon content is generally low, about 0.30% or less, which helps to reduce the brittleness of the steel pipe and make it more suitable for low temperature environment. Moderate manganese content can improve the strength and toughness of the steel pipe. At the same time, there are strict limits on the content of phosphorus and sulfur to prevent hot brittle and cold brittle phenomena, and the content of phosphorus is usually not more than 0.025% and the content of sulfur is not more than 0.025%.
Mechanical property
Tensile strength: The tensile strength requirements of ASTM A333GR6 steel pipe vary according to the size of the steel pipe and other factors, generally between 415-585MPa. This ensures that the steel pipe has sufficient strength to resist breaking when it is subjected to tensile forces.
Yield strength: The minimum yield strength is about 240MPa. The yield strength is the critical stress for plastic deformation of the material, and this value ensures that the steel pipe will not be excessively deformed under a certain pressure.
Elongation: elongation is not less than 30% (standard distance length is 50mm). The higher elongation indicates that the steel pipe has good toughness when subjected to external force at low temperature, and can withstand a certain degree of deformation without brittle fracture.