304 Stainless Steel Round Bar 1.Standard:AISI,ASTM,GB,JIS 2.Grade: ... ,300,400 series 3.Diameter:6-360mm Stainless Steel Round Bar 1) Grade : 321, 304, 304L, 316, 316L, 317, ... Steel Round Bar1) Outside Diameter: from 3 mm to 240mm2) Main Material: Grade : 321, 304, 304L, 316, 316L, 317, ... our best attention all the time.type stainless steel round bar size3 mm to 240mmgrade321, 304, 304L, 316, 316L, 317 ...