Drill String Cross-over Sub uses AISI4145H chromium-molybdenum steel, execute API specification.We can produce the same-dia type, reducers type and L-type three types, the screw can be cold thread rolling, copper or phosphate treatment.
S 35 C round bar is one of the h high carbon round bars which under the standard of JIS G 4051. S35C is carbon steel defined for machine structural use. S35 C round bar has excellent weldability and machinability.
ASTM A671 CA55 LSAW steel pipeline,under ASTM specification.ASTM A671 CA55 LSAW steel pipeline used for conveyance of oil, petrifaction, natural gas, town gas, water and coal slurry, also applied in construction, bridge, power engineering, etc.