HIGH STRENGTH COPPER ALLOY PIPE WITH GOOD WORKABILITY AND MANUFACTURING METHOD THEREOF

The present invention relates to a copper alloy pipe with excellent strength and excellent workability containing copper, iron, and phosphorus and a method for manufacturing the same and more specifically, to a method for manufacturing a smoothing surface copper ally pipe comprising: a copper alloy pipe comprising 0.03-0.15 wt% of iron (Fe), 0.015-0.07 wt% of phosphorus (P), and residues comprising copper (Cu) and unavoidable impurities; a step for casting a billet comprising 0.03-0.15 wt% of iron (Fe), 0.015-0.07 wt% of phosphorus (P), and residues comprising copper (Cu) and unavoidable impurities; a step for obtaining a small pipe by hot extruding the casted billet; a step for obtaining a pipe by cold pipe rolling the obtained small pipe; a step for cold drawing the obtained pipe; a step for level winding the cold drawn pipe in a coil form; and a step for heat treating the pipe winded in a coil form at 450-650°C for 3-6 hours, and a method for manufacturing a copper alloy pipe having a groove in an inside which partially transforms the above method. According to the present invention, the copper alloy pipe has excellent strength and excellent workability at the same time. [Reference numerals] (S100) Casting step; (S200) Hot extruding step; (S300) Cold pipe rolling step; (S400) Cold drawing step; (S500-1) Level winding step; (S600-1) Heat treating step