Microstructural and mechanical characterizations of steel tubes joined by transient liquid phase bonding using an amorphous Fe–B–Si interlayer

•We joined steel tubes by means of TLPB process using a Fe–B–Si foil as interlayer.•We characterized both microstructure and mechanical properties of the joint.•The microstructure at the joint consists only of ferrite grains.•Evidences of non-epitaxial solidification were found.•Both tensile and hardness tests show the soundness of the joint.