Control-rolled Ti-containing type low alloy steel plate at the grade of 345 Mpa and production method of control-rolled Ti-containing type low alloy steel plate

The invention discloses a control-rolled Ti-containing type low alloy steel plate at the grade of 345 Mpa and a production method of the control-rolled Ti-containing type low alloy steel plate. The control-rolled Ti-containing type low alloy steel plate at the grade of 345 Mpa is prepared from, by weight, 0.14-0.17% of C, 0.060-0.080% of Ti, 0.40-0.70% of Mn, smaller than or equal to 0.50% of Si, smaller than or equal to 0.035% of P, smaller than or equal to 0.035% of S, smaller than or equal to 0.007% of Nb, smaller than or equal to 0.15% of V, maller than or equal to 0.30% of Cr, smaller than or equal to 0.50% of Ni, smaller than or equal to 0.30% of Cu, smaller than or equal to 0.012% of N, smaller than or equal to 0.10% of Mo and the balance Fe and inevitable impurities. The design idea of C-Mn-Ti is adopted on the ingredient design of the steel plate, Nb alloy is omitted, Mn alloy is reduced, cost is low, and it is detected that the conventional mechanical properties of the steel plate meet the following requirements that Rp 0.2 is larger than or equal to 360 Mpa, Rm is larger than or equal to 510 Mpa, A is larger than or equal to 22%, and the impact power at minus 20 DEG C in the longitudinal direction is larger than or equal to 100 J. The mechanical properties of the steel plate can completely meet the standard requirement of the low alloy metal plate at the grade of 345 Mpa, and the steep plate has very good market prospects and high profits.