Q235 ordinary carbon structural steel

　　Q235 ordinary carbon structural steel, also known as A3 board.
　　Ordinary carbon structural steel - Pu plate is a kind of steel material.
　　Basic introduction
　　Q is representative of the yield limit of this material, followed by 235, refers to the yield value of this material, in the 235MPa or so. And with the increase of the thickness of the material and the yield value decreased (thickness / diameter less than or equal to 16mm, yield strength is 235MPa; 16mm< thickness / diameter less than or equal to 40mm, yield strength is 225MPa; 40mm< thickness / diameter less than or equal to 60mm, yield strength is 215MPa; 60mm< thickness / diameter less than or equal to 100mm, yield strength 205MPa; 100mm< thickness / diameter less than or equal to 150mm, yield strength is 195MPa; 150mm< thickness / diameter less than or equal to 200mm, yield strength is 185MPa). Due to moderate carbon, better comprehensive performance, strength, plasticity and welding and other properties have been better coordination, the most widely used.
　　By the Q+ number + quality grade symbol + the method of symbol composition. The steel dubbed "Q", representing the yield point of steel, behind the digital representation of the yield point value, in units of MPa such as Q235 said the yield stress (s) for carbon steel 235 MPa.
　　The necessary grades can be marked behind said deoxidation methods of quality grades and symbols. The quality grade symbols are A, B, C, D. The method symbol: F said that the boiling steel; B said semi killed steel: Z said killed steel; TZ said special calm steel, calm steel can not mark, that is, TZ and Z are not standard. Q235-AF, for example, is a class of boiling steel.

　　For special purposes, such as steel, marine steel bridge, basically adopt carbon steel structure representation, but added that the final use of steel letters.