... .Grade:410,420,202,301,304,321,316,310s7.High quality ,competitive price ,fast delivery. Grade20#,45#,16Mn,St372 ... standard or according to client's requirement306 Stainless steel channel steel Hot-rolled stainless steel common channel steel (GB707-88) main use: common ... 10-40 specifications #. Main application: construction and steel structure, etc High Quanlity 306 Stainless Steel Channel Steel