304 Stainless Steel Round Bar 1.Standard:AISI,ASTM,GB,JIS 2.Grade:200,300,400 series 3.Diameter:6-360mm Stainless Steel Round Bar 1) Grade : ... 321, 304, 304L, 316, 316L, 317, 317,310S 2) ... of our best attention all the time.type stainless steel round bar size3 mm to 240mmgrade321, 304, 304L, 316, 316L, 317, 317L,310s, ...