Abstract: The present invention corresponds to a machine for testing mechanical properties of hollow cylinders. The machine comprises an open container in which the hollow cylinder is arranged. Inside the hollow cylinder there is an expanding cylindrical membrane, which is connected to a pressure unit that supplies a pressurized fluid to the expanding membrane. A valve and a pressure sensor are located between the pressure unit and the expanding cylindrical membrane. A control and data capture system is connected to the pressure unit, the valve and the pressure sensor. The machine performs tensile and compression tests on hollow cylinders.