... , 300 series, 400serieS 3. Standard: ASTM, AISI, DIN, JIS, EN, GB 1. Size: (6mm-630mm)*(1mm-45mm)2. Material: 200 series, 300 ... series, 400series3. Standard: ASTM, AISI, DIN, JIS, EN, GB 4. Surface: white acid, annealed, black, bright, or as customers ...