Friction welding is the process of joining a material that utilizes heat that occurs from the results of friction and pressure in a certain time both surfaces of the material. In the process of joining the brass pipe metal that is often used is by the brazing method. However, this brazing method still has some drawbacks, including: still need filler metal, smoke arises, and takes a long time in the process. As an alternative to cover the deficiencies in the brazing process this method can use friction welding. This study aims to determine the effect of friction time on microstructure, hardness, and tensile strength on joints resulting from welding friction welding of brass pipes. The material used in this study is metal brass pipe with an outer diameter: 22mm, inner diameter: 19mm, thickness: 1.5mm, and length: 75mm. The parameters used in this study is to vary the friction time 2 seconds, 3 seconds, and 4 seconds. The rotation of the friction welding machine that is used is constant at 1000 Rpm. The friction pressure used is 30 MPa and the upset pressure is 50 MPa. Tests carried out in this study are metallographic testing, hardness testing, and tensile strength testing. Based on the result of this research, an increase of friction time resulted in smaller microstructure in the joint area thus increasing the hardness of the area. The hardest of joint area is in the 4 seconds friction time variation which is 106,5 VHN, the hardness of joint area in 2 seconds and 3 seconds friction time variation is 103,0 VHN. The tensile test result showed that 3 seconds friction time variation has the highest tensile strength of 270 MPa, however it is still lower than the material tensile strength of 497 MPa.