... .Grade:200,300,400 series 3.Diameter:6-360mm Stainless Steel Round Bar 1) Grade : 321, 304, 304L, 316, 316L, 317, 317, ... steel round bar size3 mm to 240mmgrade321, 304, 304L, 316, 316L, 317, 317L,310s,904L etc.standard/ASTM/ASME/DIN/JIS and etccertificateISO,SGS,and ... third part inspection. 304 Stainless Steel Round Bar