第二章钢筋和混凝土的材料性能 热轧钢筋 Hot ro| ed Steel Reinforcing Bar HPB235级、HRB335级、HRB400级、RRB400级 HPB HRB RRB Bar Bar Bar Plain Rolled Ribbed Hot rolled Hot rolled Rolled 屈服强度∫(标准值=钢材废品限值,保证率9773%) HPB235%: fk=235 N/mm2 HRB335级:uk=335N/mm2 HRB400级、RRB400级:f=400N/m2第二章 钢筋和混凝土的材料性能 热轧钢筋 Hot Rolled Steel Reinforcing Bar HPB235级、HRB335级、HRB400级、RRB400级 HPB Hot rolled Plain Bar HRB Hot rolled Rolled Bar RRB Rolled Ribbed Bar 屈服强度 fyk（标准值=钢材废品限值，保证率97.73%） HPB235级： fyk = 235 N/mm2 HRB335级： fyk = 335 N/mm2 HRB400级、RRB400级： fyk = 400 N/mm2