Read:2387 Author:admin Publish Time: 03-05-2019
Seamless cold drawn steel tube has the characteristics of high size accuracy, high strength, excellent machinability and uniform compared to hot-rolled steel pipe products. WAN Steel manufactures and supplies many types of seamless cold drawn steel pipe available for mechanical and hydraulic applications.
Our Russia customer sent us an inquiry for 32.5*8.2mm cold drawn seamless steel pipe in October 2018. The cold drawn seamless tube material he required was 35CrMo. The order quantity was more than10tons, and the length for each piece cold drawn seamless tube he required was 7500mm, the inside tolerance was plus or minus 0.2mm max. When we firstly received the inquiry, we found the 12.15mm thickness of the seamless cold drawn steel tube thickness was very thick, and the length was extremely long. According to the customer’s detailed specifications, it was very difficult to manufacture, and we believed that there were nearly no such cold drawn seamless tubes manufacturers in china who have the production and development capability to produce this kind of cold drawn seamless tube.
After about half a Month, the customer got the 10 tons seamless cold drawn steel tube in Russia and he was very satisfied and arranged the next 20tons order with the same specification of seamless cold drawn steel pipe on 28th December, 2018.
We produced the second order more quickly and smoothly with the help of the experiences of first order. In the mean time, we improved the production process to guarantee the size precision of the seamless cold drawn steel tube and kept the mechanical property better. We found that if we processed with the method of one time cold rolled and two times cold drawn, we could manufacture the cold drawn seamless tube better with specified mechanical property and in shorter production cycle. This time we produced 20 tons seamless cold drawn steel pipe within 25 days. New production process made the cold drawn seamless pipe size more uniform for the whole length and mechanical property more stable. Then we arranged the shipping for this batch of seamless cold drawn steel tube as soon as possible.
When Russia customer got the seamless tube produced with improved processes, he was totally satisfied with our seamless cold drawn steel tube quality and production technique. Thus a bigger quantity order totally about 100 tons was directly arranged to us. In the third order, Russia customer added more and higher technical requests including heat treatment and final polishing, which made production of seamless cold drawn steel pipe much more complex and difficult. To guarantee good physical and chemical properties, we conducted tests again and again. We sent the final sample to customer for confirmation. After customer’s testing on the sample, we were informed to keep going on with the large order production. The first batch of this 100tons seamless cold drawn steel pipe was estimated to be delivered in May, 2019.
Wan steel is working harder to be the first brand for the cold drawn seamless steel tube in China. We supply seamless cold drawn steel tube sizes that range from 4mm to 140mm, tolerance can reach 0.025mm. Our precision cold drawn seamless tube scan be arranged at delivery state BK, NBK, BKS, GBK, or BKW etc. Now we have 8 sets of cold rolling production lines, 8 sets of cold drawn production lines, and full production process line from drilling hole process to the finished products.
Warmly welcome you to visit us and hope we can build good and long term business cooperation together happily.
