Organizational Features: Q&P steel comprises ferrite, martensite, and retained austenite, with a retained austenite content ranging from 5% to 10%.
Performance Characteristics: As the martensite serves as the primary matrix phase and residual austenite participates in the deformation process, Q&P steel leverages the TRIP effect to attain a higher work hardening capacity. Consequently, it offers superior plasticity and formability when compared to equivalent ultra-high strength steel.
Main Applications: Q&P steel finds application in automobile safety and structural parts that have intricate geometries.
Ordinary cold rolled Q&P steel
Grade
Mechanical properties
YS(MPa)
TS(MPa)
EL(%)
HC600/980QP
600-850
≥980
≥15
HC600/960QP-EL
600-850
≥980
≥20
HC820/1180QP
820~1100
≥1180
≥8
HC820/1180QP-EL
820~1100
≥1180
≥14
Hot dip galvanized Q&P steel
Grade
Mechanical properties
YS(MPa)
TS(MPa)
EL(%)
HC600/980QPD+Z
600~850
≥980
≥15
HC600/980QP-ELD+Z
550-800
≥980
≥20
HC820/1180QPD+Z
820-1100
≥1180
≥8
HC820/1180QP-ELD+Z
820~1100
≥1180
≥14
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