國產(chǎn)普通鋼筋按其屈服強(qiáng)度標(biāo)準(zhǔn)值的高低,分為4個強(qiáng)度等級:300 MPa,335 MPa,400 MPa,500 MPa。國產(chǎn)普通鋼筋現(xiàn)有8個牌號。牌號HPB300是熱軋光圓鋼筋,屈服強(qiáng)度標(biāo)準(zhǔn)值為300 MPa,符號φ;HRB335是熱軋帶肋鋼筋, 屈服強(qiáng)度標(biāo)準(zhǔn)值是335 MPa, 用符號&9038;表 (共 301 字) [閱讀本文] >>