Cooler for vehicle

A cooler apparatus for a vehicle, which is configured so that a tube forming an exhaust gas passage is mounted in a cooler housing forming a coolant passage and a cooling fin is inosculated in the tube with a predetermined pattern such that the exhaust gas passage is partitioned, comprising:

• the tube formed in a clad metal configured such that brazing layers are formed at first and second external surfaces of diffusion preventing layers which are A1000 series in a state of forming the diffusion preventing layers at first and second surfaces of a main layer including aluminum alloy,
• wherein the tubes are disposed apart from each other as a predetermined gap with respect to a vertical direction in the cooler housing and are inosculated to the cooler housing,
• wherein the main layer includes aluminum alloy including manganese,
• wherein the main layer includes an A3000 series material,
• wherein the brazing layers include an A4000 series material for brazing inosculating the tube with the cooling fin, and
• wherein a thickness of the brazing layers and a thickness of the diffusion preventing layers are predetermined in 5-10% ranges of an entire thickness of the clad metal.