What is carbon structural steel?

This type of steel mainly ensures its mechanical properties, so its grade reflects its mechanical properties, represented by Q+numbers, where "Q" is the initial Chinese pinyin of the yield point "Qu", and the number represents the yield point value. For example, Q275 represents the yield point of 275MPa. If the letters A, B, C, and D are marked after the grade, it indicates that the quality level of the steel is different, and the amount of S and P decreases in sequence, while the quality of the steel increases in sequence. If the letter "F" is marked after the grade, it is boiling steel; if "b" is semi killed steel; if "F," or "b" is not marked, it is killed steel. For example, Q235-A · F represents A-grade boiling steel with a yield point of 235MPa, and Q235-c represents c-grade killed steel with a yield point of 235MPa.

Carbon structural steel is generally not subjected to heat treatment and is used directly in the supplied state. Usually, Q195, Q215, and Q235 steel have low carbon mass fraction, good welding performance, good plasticity and toughness, and certain strength. They are often rolled into thin plates, steel bars, welded steel pipes, etc. Dalian stainless steel Dalian special steel products Dalian steel products 440C stainless steel is used in structures such as bridges, buildings, and the production of ordinary rivets, screws, nuts, and other parts. Q255 and Q275 steel have a slightly higher quality fraction of carbon, higher strength, better plasticity and toughness, and can be welded. Usually, rolled steel, bar steel, and steel plates are used as structural components and to manufacture simple mechanical parts such as connecting rods, gears, couplings, and pins.

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