JIS G3302 SGH400 galvanized steel plate and coil under hot rolled. When orders for galvanized steel sheet and coil SGH400,customers need inform us their request for steel plate surface quality.Such as As coated surface (A) which imperfections like small pits,variations in spangle size,dark spots,stripe marks and light passivation stains are permissible.Improved surface(B) which is obtained by skin passing.Best quality surface (C) which is also done skin passing,and the steel surface shall not impair the uniform appearance of a high-class paint finish.The other side shall have at least the characteristics of surface quality B.