... ,00Cr19Ni11,Q345,L245 ,1Cr18Ni90Cr18Ni11Nb ,10#,20#,45#,(2) Good credit and quality 2.9mm1620mm(3)Standard:GB/T9711.1-1997,GB ... ,A192,API5L/GR.B-X52,J55,K55 (4) Usage: oil and gas transmission, pipe, pier, Civil Engineering, building works etc. We ...