... size & big size PC Steel Wire Description:Stress-relieved, low relaxation, high tensile strength, pre-stressing steel wire for pre-cast pre-stressed concrete ... 3, 9.4, 10.0 mm Raw Material: High carbon steel wire rod grade SWRH77B, SWRH82B Standard: ASTM A421, ASTM A648, ... PHC, PPCP etc. History: Because of excellent quality and competitive price, our Daqiang PC steel products had been used in many ...