What is the specification of SS400 pipe?
SS400 is a Japanese standard carbon structural steel pipe with a tensile strength of 400 MPa. Due to its moderate carbon content, it has good overall performance, with a good balance of strength, plasticity, and weldability, making it the most widely used steel. SS400 steel plate itself possesses a comprehensive range of excellent properties, including high strength, high toughness, fatigue resistance, impact resistance, wear resistance, corrosion resistance, weldability, and ease of processing.
Chemical Composition of SS400 Steel
The chemical composition of SS400 steel pipe mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P). Specific contents are as follows:
The carbon (C) content typically does not exceed 0.22%, and carbon is the main factor affecting the performance of the steel plate.
The silicon (Si) content generally does not exceed 0.35%.
The manganese (Mn) content is approximately between 1.40% and 1.75%. Silicon and manganese can improve the strength and toughness of the steel plate.
Sulfur (S) and phosphorus (P) are impurity elements, and their contents need to be controlled within certain ranges. Typically, the sulfur content does not exceed 0.05%, and the phosphorus content does not exceed 0.045% to ensure the performance of the steel plate.
Mechanical Properties of SS400
The mechanical properties of SS400 are mainly reflected in its yield strength and tensile strength.
Yield strength measures a material's ability to resist plastic deformation under external force. For SS400 steel, the yield strength varies depending on the steel thickness. Specifically, when the steel thickness 'a' is less than 16 mm, the yield strength should be greater than or equal to 245 MPa; when the steel thickness is between 16 mm and 40 mm, the yield strength should be greater than or equal to 235 MPa; and when the steel thickness exceeds 40 mm, the yield strength should be greater than or equal to 215 MPa.
Tensile strength reflects the maximum force a material can withstand during tension. For SS400 steel pipes, the tensile strength range is typically between 400 and 510 MPa. Higher tensile strength indicates a stronger ability to resist failure under tensile force.
Furthermore, SS400 steel pipes also exhibit good elongation and impact energy. Elongation indicates a material's ability to undergo plastic deformation under tensile force, while impact energy reflects a material's resistance to impact loads. These performance indicators together ensure that SS400 steel pipes have good stability and reliability when subjected to certain loads and impact forces.
SS400 Structural Tube factory
