This is a localized high-strength steel that provides multiple areas of different strengths in a single steel piece through utilizing localized quenching, one of the characteristics of induction quenching.
(Patented)
- Multiple areas of different strengths within a single steel bar
Neturen has achieved steel processed with varying strengths, such as 1,400 MPa in a high-strength area and 700 MPa in an ordinary-strength area.

Localized high-strength rebar, Double StarkⓇ can help to save weight and reduce construction costs since it reduces the size and number of rebars through placement of high-strength areas in the joints of columns and beams, on which strong forces act during earthquakes.

