The deal which took two years to get off the ground is aimed at creating synergies and reducing overcapacity and will form the continents secondlargest steelmaker after ArcelorMittal PositiveBRUSSELS Germanys Thyssenkrupp and Indias Tata Steel will be warned this week that EU antitrust regulators could veto their planned European steel joint venture unless they offer concessions people familiar with the matter said on Monday