pipeline steel plates

Chemical composition of pipe line steel plates Grade C Si Mn P S Nb Ti Mo Ni X80 0.09 0.35 2.0 0.015 0.0030 0.090 0.025 0.35 0.30 X70 0.10 0.35 1.70 0.015 0.0040 0.080 0.025 0.30 0.30 X65 0.10 0.35 1.65 0.015 0.0050 0.060 0.025 0.30 0.30 X65MS 0.09 0.35 1.60 0.015 0.0020 0.060 0.025 0.15 0.30 grade Cu Alt V N Cr B Ca Ceq Pcm X80 0.30 0.060 0.060 0.0080 0.30 0.0005 0.0060 0.45 0.25 X70 0.30 0.060 0.060 0.0080 0.30 0.0005 0.0060 0.42 0.21 X65 0.30 0.060 0.060 0.0080 0.30 0.0005 0.0060 0.42 0.21 X65MS 0.30 0.060 0.060 0.0080 0.30 0.0005 0.0060 0.40 0.20 Mechanical properties of pipe line steel plates grade Rt0.5MPa(Min) Rt0.5MPa(Max) Rt(Rt0.5)/Rm A50% Transversal impact HV10 X80 555 660 <0.92 >25 >260 <265 X70 490 660 <0.90 >25 >260 <250 X65 470 580 <0.90 >27 >260 <240 X65MS 470 580 <0.91 >27 >260 <230 Note:1. The impact test condition is: -20 celsius degree, AKv,J. 2. Requirment on DWTT, grain size, inclusion level, band structure and etc. to comply with technical agreement.