Originally Posted by ultraman6970

To me looks like that thing had been broken for a while, did not snap out of the blue and just after months of years just gave up.

A lot of heat, drop the old parts, and BRAZE the new one in. Done.

No idea what bike is but if its an old touring frame will be cheaper to get a new one because those dont worth time or money unless was used by EM, it is a one of a kind frame or maybe your grandma used it in the war and there is a sentimental attachment with the frame.

Good luck.