Torn wire at the drawing through sigma-phase - 1.4462
The sigma-phase is a brittle, intermetallic phase with high hardness. The sigma-phase is very brittle and has a bad impact strength. For this reason material with sigma phase can be usually bad or not processed. In this case it came to demolitions at the drawing.
Rod wire 5,50 mm round - solution annealed
following drawn at 1,50 mm