... at different positions is small, which for user-friendly.4.Low-fold organization is dense: Dense, segregation, ... the straight: it can achieve the flatness≤3mm/m, it is ease to cut as production use. ... P355NL2P355NL2, A516Gr55(60,65,70)A299A517GrQ(A,B,E,F, H , P,S,)EN10028-3:2003ASTM A516/A516M-06ASTM A299 ... the roughness can be controlled as 5mm / m. super thick steel low alloy steel plate S355J2G3