Wuxi Duorunde Steel Tube Co., Ltd (My Answer); ? Precision rolled precision steel tubes and cold-drawn seamless precision steel tubes are both a kind of precision steel tubes, and they have certain differences in manufacturing process, accuracy, performance and application. Here are their differences:
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1. Manufacturing process: Precision rolled precision steel tubes are precision machined from strip steel by means of a finishing mill in order to obtain a high precision outer diameter and wall thickness. In contrast, cold-drawn seamless precision steel tubes are made by cold-drawing process, which passes the steel billet through multiple drawing mold holes to obtain high-precision outer diameter and wall thickness. As a result, fine-rolled precision steel tubes are manufactured without the use of die holes, whereas cold-drawn seamless precision steel tubes require the use of die holes.?
2. Precision: precision rolled precision steel tubes are more accurate, and the accuracy of their outer diameter and wall thickness can reach about ±0.05mm. Cold drawn seamless precision steel tube precision is also higher, but relative to the precision rolled precision steel tube is slightly lower, its outer diameter and wall thickness of the accuracy can usually reach ± 0.1mm or so.
3. Performance: The surface quality of precision rolled steel tubes is better, with no obvious defects such as scratches, burrs and oxidized skin. In addition, because of its manufacturing process does not use the drawing mold hole, so its inner wall is smoother, less fluid resistance. And the surface quality of cold-drawn seamless precision steel tubes is also better, but there may be some minor defects such as scratches and oxidized skin. Due to the use of drawn mold holes in its manufacturing process, its inner wall may be rougher and the fluid resistance is higher.
4. Application: Precision rolled precision steel tubes are widely used in petroleum, chemical, food, pharmaceutical and other fields, as well as in the manufacture of a variety of high-precision mechanical parts. Due to its high precision and good surface quality, precision tubes can play an outstanding role in these fields. On the other hand, cold-drawn seamless precision steel tubes are mainly used in the fields of construction and pipeline, which do not require high precision and pay more attention to the strength and durability of the material. There are some differences between the fine-rolled precision steel tubes and cold-drawn seamless precision steel tubes in terms of manufacturing process, precision, performance and application. Precision rolled precision steel tubes have higher precision and better surface quality, and are suitable for the manufacture of high-precision mechanical parts and the use of a variety of industrial fields; while cold-drawn seamless precision steel tubes are mainly used in construction, pipelines and other fields of use. When choosing to use, you need to choose the right type according to the actual needs and application scenarios.