Steel plate with high strength and low yield ratio
A low-yield ratio, high-strength technology, applied in the field of iron and steel materials, can solve the problems of complex chemical composition, low strength, and increased raw material costs, and achieve the effect of simple production process, low cost, and reduced production costs
Active Publication Date: 2010-03-24
BAOSHAN IRON & STEEL CO LTD
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The present invention provides a steel plate with high strength and low yield ratio, which comprises chemical components as follows: C: 0.15-0.20 wt%, Si: 1.0-2.0 wt%, Mn: 1.8-2.0 wt%, Al<=0.036 wt%,V: 0.05-0.1 wt%, P<=0.01 wt%, S<=0.005 wt%, Cr: 0.8-1.0 wt%, the residual is Fe and other unavoidable impurity. The hot-rolling steel plate with high strength and low yield ratio is obtained by adopting low alloyed processing and traditional TMCP rolling technique, which has a strength reaching to 1200-1500 MPa, simultaneously, has better low temperature impact toughness. The steel plate is suitable for the fields requiring high strength and low yield ratio, such as mechanical manufacture, fuel/gas delivery pipeline, building, bridge, steel rail and pressure vessel, etc.
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