... A572/A572M-07GB711-88JB/T1271-2002Hydropower steelS355JO,S355J2, S355NL1,A516Gr55(60,65,70)EN10025-2:2004ASTM A516/A516M-06Boiler vesselP355, P355NH ... , P355NL1, P355NL2P355NL2, A516Gr55(60,65,70)A299A517GrQ(A,B,E,F, H , P,S ... is smooth, the roughness can be controlled as 5mm / m. super thick steel low alloy steel plate S355J2G3