News of the indicative bid for Thyssenkrupp Steel Europe (TKSE) - Germany's largest steelmaker that made 10.7 billion euros ($12.6 billion) in sales in the past fiscal year - sent shares in the German conglomerate up 5.3% by 1334 GMT.
Thyssenkrupp said it would closely examine the offer "particularly with regard to economic sustainability, the continuation of the green transformation and employment at our steel sites".
It did not provide any financial details about the bid, which comes as the German industrial group is seeking to partially divest most of its businesses in a bid to become leaner and more focused.
A sale to Jindal Steel International would be a success for Thyssenkrupp after unsuccessful attempts by the submarines-to-car parts group to sell TKSE in recent years, with several billion euros in pension liabilities remaining a key issue.
Jindal Steel International, in a separate statement, said its offer would secure steel production in Germany, include the completion of a green steel production site by TKSE in Duisburg, and a more than 2 billion euro commitment to establish additional electric arc furnace capacity.
"Our goal is to preserve and grow Thyssenkrupp's 200-year industrial legacy and help transform it into Europe's largest integrated low emission steelmaker," Narendra Misra, director of European Operations at Jindal, said.
Thyssenkrupp last year sold a 20% stake in TKSE to Czech billionaire Daniel Kretinsky, with the aim of eventually selling a further 30% stake to eventually create a 50-50 joint venture.
Powerful labour union IG Metall has criticised the move, saying Kretinsky had not provided information about his strategic plans as a co-shareholder.
Kretinsky's EPCG division declined to comment.
Thyssenkrupp's deputy supervisory board chairman and senior IG Metall member Juergen Kerner said news about the offer was good and that deeper discussions should start as soon as possible.
($1 = 0.8468 euros)
