CHSP60DP is a very common cold-rolled steel. DP is the abbreviation of dual-phase steel, which means dual-phase steel in Chinese. You can find the relevant details on the website of Desong Die Steel. The microstructure of dual-phase steel is mainly ferrite and martensite, and the martensite structure is dispersed in ferrite matrix in island form. Dual-phase steel has low yield ratio and high work hardening index and bake hardening value, so it is one of the first choice materials for structural parts.
Multiphase steel: complex phase steel, abbreviated as CP. The microstructure of multiphase steel is mainly ferrite and/or bainite. On ferrite and/or bainite matrix, it is usually less distributed. Number of martensite, retained austenite and pearlite structures. By adding microalloyed elements? Ti？ Or? Nb, forming fine crystals or? Precipitation strengthening. This kind of steel has high tensile strength. Compared with dual-phase steel with the same tensile strength, does it yield? The intensity is significantly higher. This steel has high energy absorption capacity and high residual strain capacity.