background

1.We got the Russia customer inquiry for 32.5*8.2mm cold drawn seamless steel steel tube in October  2018,  , the tube material is 35CrMo , quantity is 10tons , length is 7500mm . When we received the inquiry , we found the tube thickness 12.15 mm ,its very thick, and the length is very long , so its very difficult to make , and we believe there is nearly no factory can make it .

As our engineer is very experienced , with more than 20 years production experience in the cold drawn seamless steel tube production ,after details calculation , he told we can try to help customer make the tube , and then we start make test ,firstly we use the cold rolled production method, but after sevel times test ,we found the tube OD size reducing heavily , and the ID diameter size change heavily . So , we have to change the raw material round bar size and make new test again and again , in the mean time we change the core bar again and again ,  In the test stage , we waste lot raw material and time , but finally we make the tube size 32.3*9.4mm successfully ,  the tube size totally satisfy the customer request  . And customer come to make the on-site test , he is very happy with the tube quality .

After the test finish, we arrange shipment to Russia the 10tons cold drawn seamless steel tube .

2.After about half Month , the customer got the 10 tons tube and are very satisfied , he arranged the next order 20tons cold drawn seamless steel tube for same size on 28th, December , 2018.

With last time order experience , we produced more quickly and smoothly , in the mean time , to guarantee the tube size and the mechanical property better , we improved the production method again .We found if we produce by one time cold rolled and two times cold drawn method can make the tube better .  This time we produced 20tons tube only use 25 days and the tube size and mechanical property are more stable .Then We arrange the shipping fastly .

3.When customer get the cold drawn seamless tube , they are totally satisfy with our technique and quality ,they directly arrange us a bigger quantity order , totally about 100 tons . In this order , customer add more request to the tube ,the cold drawn seamless steel tube need do heat Treatment and polishing , the technical request is very high .

To guarantee the quality , we make test again and again , and we sent sample to customer for test .

After testing , the customer inform us to keep going on the large order production , and we plan to make  the first batch order delivery in May .

Cold drawn Precision seamless steel tube order for Russia customer

Cold drawn Precision seamless steel tube order for Russia customer

Cold drawn Precision seamless steel tube order for Russia customer

Cold drawn Precision seamless steel tube order for Russia customerCold drawn Precision seamless steel tube order for Russia customer

Our company aim to be the top one supplier is the cold drawn seamless steel tube field in China, we make the tube size from 4mm-140mm , the tube size tolerance can reach 0.025mm ,Now we have 8 sets cold rolling production line and 8 sets cold drawn production line , from drilling hole process to the finally tube , we have full production line process. The tube delivery state can be BK, NBK,BKS,GBK,BKW ect

Warmly welcome you come to visit us and hope we can do business together happily .