312 Stainless Steel Flat Bar 1. grade:200 , 300 , 400 series 2. size: 3mm - ... x 25mm - 120mm 3. ISO , BV , GSG 312 Stainless Steel Flat Bar 1. grade: 201 , 202 , 301 , 302 , 303 , 303Cu , 304 ... steel , such as ss round bar , ss angle bar , ss flat bar , ss angle bar , ss channel bar , ss hexagonal bar ...