Cold rolled steel strips for bicycles (YB/T5067-1993)
Cold rolled steel strips for bicycles (YB/T5067-1993) is the standard that regulates the production process and quality requirements of cold rolled steel strips for bicycles. This standard is applicable to the production and acceptance of cold rolled steel strips for bicycles.
Cold rolled steel strips for bicycles (YB/T5067-1993) have various mechanical properties. The steel strips have a yield strength ranging from not lower than 245MPa to 50PMa. They have a tensile strength of not less than 270MPa to 550MPa and an elongation of not less than 16%. The steel strips also have a bending strength of not less than 505MPa and a cold bending degree of not less than 7%. Moreover, the steel strips have a Vickers Hardness between 160HV5 to 340HV10 and a diameter ranging from 2mm to 25mm.
Cold rolled steel strips for bicycles (YB/T5067-1993) are mostly used for the production of bicycle frame components. Since its flexibility is small and its strength is high, cold rolled steel is particularly suitable for these components. Meanwhile, the plasticity and strength of the cold rolled steel allows for these bicycle parts to be formed into shapes with greater accuracy and consistency.
The quality requirements for cold rolled steel strips for bicycles (YB/T5067-1993) are very strict. The steel strips must be free from any defects such as pores, laps and seams. The surface of the steel strips must be smooth and flat. The intensity of the steel strips must also meets the requirements. Furthermore, chemical test and mechanical test must be done to insure the quality of the steel strips.
The cold rolled steel strips for bicycles (YB/T5067-1993) produced by the following production procedures and quality requirements have high performance and better safety in use.
Firstly, chemical components must meet the requirements of this standard, such as C＜0.22%, Mn＜0.40%, S≤0.020% and P≤0.020%.
Secondly, the surface of the steel strips must be clean and free from oil, scale, welding and corrosion. It is also mandatory that the steel strips must pass a series of tests such as straightness and roundness.
Thirdly, the mechanical properties of the steel strips must meet the requirements of this standard, such as the elongation, tensile strength, and bending strength.
Fourthly, the steel strips must also meet the hardness requirement, with a Vickers Hardness of not less than 160HV5 and not more than 340HV10.
In order to ensure the quality of the cold rolled steel strips for bicycles (YB/T5067-1993), a series of credibility tests are carried out. As the test samples are prepared at random, the test must be conducted twice, and the test results must be in accordance with both test cases. The tests include visual inspection, chemical components test and mechanical property test.
To sum up, cold rolled steel strips for bicycles (YB/T5067-1993) is an industrial standard that helps to regulate the production process and quality requirements of cold rolled steel strips for bicycles. Therefore, the products could be of consistent quality while the application of cold rolled steel strips for bicycles become more and more wide.
