... 82b / 77b Standard: BS5896 GB/T5223-2002 ASTM A421 ASTM A881/A881M Dia:4mm to 10mm Month output: 6000tons prestressed concrete steel wireWe ... steel wire , We can produce 1570Mpa 1670Mpa 1770Mpa 1860Mpa according to ASTM A421 , ASTM A881/881M , BS5896/1980 , GB/T5223 . Single indented ... ribbed PC wire and smooth PC wire .We have exported to Korea, USA, Pakistan, Egypt, South Africa, Southeast Asia, ...