Division of T-section steel mechanical properties and surface quality of hot-rolled H-beam (GB/T 11263-1998)
Introduction
T-section steel is a kind of hot rolled H-section steel with high strength, good stiffness and strong shearing force. Its cross-section, divided by a certain angle obliquely cutting or notching the two planes of the two sides of the web and two sides of the high-speed H-beams, has the characteristics of small section and good weldability. For T-section steel, GB/T11263-1998 is the national standard that specifies the mechanical properties and surface quality of hot-rolled T-section steel. The purpose of this paper is to analyze and understand the contents of GB/T 11263-1998.
Main contents
1. Mechanical properties of T-section steel
According to GB/T 11263-1998, the mechanical properties of hot-rolled H-section steel should meet the following requirements:
(1) The yield strength of H-beam should not be less than 235MPa.
(2) The tensile strength of H-beam shall not be less than 360MPa.
(3) The elongation of H-beam in the cross-section should not be less than 17%.
2. Surface quality requirements of T-section steel
According to GB/T 11263-1998, the surface quality of hot-rolled H-section steel should meet the following requirements:
(1) The surface of the H-beam shall be flat and the surface shall be free of visible defects.
(2) The surface of H-beam shall be free of any serious defects such as pits, cracks, scabs, folds and rolling marks, etc.
(3) The welding of H-beam shall be smooth and firm, with no extra metal or welding scars and burrs.
Conclusion
Summing up all the contents of GB/T 11263-1998, the mechanical properties and surface quality requirements of hot-rolled H-section steel are specified. The paper discusses and explains the technical requirements of the GB/T in detail, including the mechanical properties requirement and the surface quality requirement of the T-section steel. The mechanical properties and surface quality requirements of hot-rolled H-beam stated in the GB/T are necessary for ensuring the quality and usage performance of the hot-rolled H-beam in engineering and machinery manufacturing.
