Traditional Culture Encyclopedia - Almanac inquiry - What are the four kinds of steel bars used in concrete structures in China?
What are the four kinds of steel bars used in concrete structures in China?
According to China's current code, from 20 10 to now, the steel bars for ordinary concrete are all hot-rolled low carbon steel, and the national standard GB 1499. 1-2008 is hot-rolled round steel bar HPB300；; The national standard GB 1499.2-2007 includes three kinds of hot-rolled ribbed steel bars: HRB335, HRB400 and HRB500, plus four kinds of HPB300*** (graded by strength).
Among them, HRB also includes HRBF335, HRBF400, HRBF500 and RRB400.
What is said upstairs is the' old yellow calendar' nine years ago. Not only the mechanical properties are wrong, but also the chemical composition is different!
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