1.Definition and production process
1. definition：Precision rolled seamless steel pipe is a seamless steel pipe produced by precision rolling process. It is made on the basis of solid tube billet through multiple processes such as perforation, tube rolling, sizing, etc., and has high standards in terms of dimensional accuracy and surface quality.
2. Production process：
1. The first step is to prepare the tube billet. The quality of the appropriate billet material has a great influence on the performance of the final steel pipe. Then the tube billet is heated to the appropriate rolling temperature, usually atAbout 1100 - 1250℃. The next step is the perforation process. Common perforation methods include oblique rolling perforation and pressure perforation. The perforated rough pipe enters the pipe rolling process, which is the key step of precision rolling of seamless steel pipes. Through continuous rolling of multi-stand rolling mills, the dimensional accuracy and wall thickness uniformity of the pipes are improved. After pipe rolling, there will be sizing and reducing processes to further accurately control the outer diameter of the steel pipe, and finally the finished product is obtained after cooling, straightening and other treatments.
1. Performance characteristics
1. High dimensional accuracy：The dimensional tolerances of the outer diameter and inner diameter can be controlled within a very small range. For example, the outer diameter tolerance can reach±0.1% - ±0.2%, the inner diameter tolerance can also reach a higher precision standard, which makes the precision rolled seamless steel pipe able to meet the requirements well in some occasions with strict dimensional accuracy requirements, such as aerospace, precision machinery and other fields.
2. Good surface quality: Its surface roughness is low, generallyThe Ra value (surface roughness parameter) can reach about 0.8 - 1.6μm, which is smoother than ordinary seamless steel pipes. This not only makes the steel pipe look good, but also reduces fluid resistance and improves transportation efficiency during use. At the same time, good surface quality is also conducive to subsequent processing, such as electroplating, painting and other surface treatments.
3. Excellent mechanical properties：The strength, toughness and other mechanical properties of precision rolled seamless steel pipes are good. Its yield strength can be achieved according to different materials and processing technology.200 - 800MPa or even higher. In terms of toughness, through appropriate heat treatment and rolling process, the steel pipe can have good impact resistance and be able to withstand certain dynamic loads.
1. Application Areas
1. Automotive Industry。
2. Mechanical Manufacturing。
3. Petrochemical。
The common implementation standards for precision rolled seamless steel pipes are as follows：
1.Q: I have never done business with you before, how can I trust your company?
Answer: Our company has entered Alibaba.com11years, longer than most other suppliers, we have been a gold supplier for many years. What's more, we have a large number of authorization certificates, such asBV，ISO9001，API, Alibaba on-site inspection certificate. I hope the above content can convince you.
2.Q: What is the minimum order quantity?
A: Yes, our company mainly deals in wholesale transactions, but if you insist on buying one piece, or you only need one piece, we will most likely mass produce it for you within the MOQ.
3.Q: How can I get a sample to check your quality? How long can I get the sample?
A: After the price is confirmed, free samples can be provided for your evaluation. After you confirm the sample details, the sample will be3-7days to be ready for delivery and will be sent to you by courier and3-5Arrived within days.
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5.Q: What are your company's shipping terms and delivery time?
Answer: Bulk20-30Days, Inventory5-10working days
6.Q: Do you have any discounts?
A: We will definitely try our best to help you get these with the best price and good service.