... ,ASTM, GB, DIN 2. Certification: ISO9001:2000 3. Shape: square Stainless steel square bar:1. Standard: AISI,ASTM, GB,DIN2. Certification: ISO9001 ... : 5mm*5mm-400mm*400mm 5. Various steel square bars can be made as per customer's requirements.6. Main grades: 201,202 ...