... 4. Standard: JIS/AISI/ASTM/GB,etc Stainless Steel Bright Round Bars And Black Round Bars: 1) Size: 5-300, length: ... 4) Black surface bar (Hot-rolled) 5) Bright Surface Bar (Cold-drawn) Main Description:1) Product name: Stainless Steel Bar( round, flat, angle, ... square, hexagonal bar).2) Standard: AISI,SUS,GB,JIS,ASTM,DIN ...