The mechanical properties of 35# seamless steel pipe are as follows:
1. Tensile strength: Not less than 530 MPa. This indicator reflects the maximum stress the steel pipe can withstand during tension, demonstrating its resistance to deformation and fracture.
2. Yield strength: Not less than 315 MPa. Yield strength is the stress value at which significant plastic deformation begins to occur in the seamless steel pipe. It is crucial for assessing the load-bearing capacity and safety of the seamless steel pipe in practical use.
3. Elongation: Not less than 20%. Elongation represents the percentage of total deformation in the gauge length section relative to the original gauge length after tensile fracture, reflecting the seamless steel pipe’s plastic deformation capacity.
4. Reduction of area (RIA) of 35# seamless steel pipe: Not less than 45%. RIA is the percentage reduction in cross-sectional area after tensile fracture, relative to the original cross-sectional area. It is an important indicator for evaluating the plasticity of seamless steel pipes.
5. Impact energy of 35# seamless steel pipe: Not less than 55 J. Impact energy reflects the fracture resistance of seamless steel pipes under impact loads and is valuable for evaluating their performance under dynamic loads.
6. Impact toughness of 35# seamless steel pipe: Not less than 69 J/cm². Impact toughness further quantifies the toughness of seamless steel pipes under impact loads.
7. Hardness of 35# seamless steel pipe: In the untreated state, the hardness should not exceed 197 HB. Hardness reflects the ability of seamless steel pipes to resist localized plastic deformation and is a valuable reference for evaluating their wear resistance and service life.
Post time: Jan-16-2026