Din high precision cold-drawn/cold rolled  seamless steel tube(polished)
Synopsis of process routing:quality carbon steel-coled drawn-heat treatment without oxidization (NBK status)-nondestructive testing.In the wall honing and inside flushing under the high pressure-.Antirust oiling outside surface-plastic capping on both ends.
Main features:high precision,excellent brightness,no oxidization on the outer and inner walls after heat treatment,high cleanness of inside wall.The steel tube is able to withstand high pressure.No deformation after cold bending,no crack after flaring and flattening.The complicated geometrical forming and machining can be realized.Color of tube:gray with white.
Main application:to be used in hydraulic system,automobile and in the occasion where the high precision,brightness,cleaness and mechanical properties of the tube are required.
Standard:DIN 2391,EN 10305 (GB/T 3639-2009)
Businee philosophy:quality coes first,creditable and high reputation,customer needs centered forever.
Main products:DIN 2391 high precision seamless steel tube,hydraulic system steel tube,auto and motorcycle steel pipe,gas spring steel tube as well.
Application:widely used in automobiles,motorcycles,gas springs,hydraulic machinery and refrigeration industry.
The main raw material used include:applied standard:St37.4(10#),St45(20#),Ck45(45#),St52.4(16Mn),20Mn,25Mn and 30CrMo.