Dual-phase steel

Therefore, the overall behaviour of DP steels is governed by the volume fraction, morphology (size, aspect ratio, interconnectivity, etc.

[3] DP steels have high ultimate tensile strength (UTS, enabled by the martensite) combined with low initial yielding stress (provided by the ferrite phase), high early-stage strain hardening and macroscopically homogeneous plastic flow (enabled through the absence of Lüders effects).

These features render DP steels ideal materials for automotive-related sheet forming operations.

The steel melt is produced in an oxygen top blowing process in the converter, and undergoes an alloy treatment in the secondary metallurgy phase.

The product is aluminium-killed steel, with high tensile strength achieved by the composition with manganese, chromium and silicon.