高强度预应力钢筋,铁以外的成分为碳0.28%~0.33%硅0.7%~1.10%、锰0.9%~1.30%、磷≤0.025%、硫≤0.025%、铜≤0.025%、加工工艺为热轧,抗热强度670~740mpa.