Carbon steel plate generally refers to carbon structural steel plate. Carbon structural steel plate refers to carbon steel with a carbon content of less than 0.8%. This steel contains less sulfur, phosphorus and non-metallic inclusions than carbon structural steel, and has better mechanical properties.

Carbon structural steel is generally not heat-treated, and is used directly in the supplied state.

Usually Q195, Q215, Q235 steel has low carbon mass fraction, good welding performance, good plasticity and toughness, and certain strength. It is often rolled into thin plate, steel bar, welded steel pipe, etc. Used in bridges, buildings and other structures and in the manufacture of ordinary rivets, screws, nuts and other parts.

The mass fraction of carbon in Q255 and Q275 steel is slightly higher, the strength is higher, the plasticity and toughness are better, and it can be welded. It is usually rolled into section steel, bar steel and steel plate as structural parts and to manufacture connecting rods, gears and couplings of simple machinery. Sections, pins and other parts.

Explanation of carbon structural steel grades:

Carbon structural steel mainly guarantees mechanical properties. Therefore, the grade will reflect its mechanical properties, expressed by Q+ number. Where "Q" is the yield point. The number indicates the value of the yield point, for example, Q275 indicates that the yield point is 275Mpa.

If the letters A, B, C, and D are marked after the grade, it means that the quality grade of the steel is different, the amount of S and P is reduced in turn, and the quality of the steel is increased in turn.

If the letter "F" is marked after the grade, it is a boiling steel; if it is marked with "b", it is a semi-killed steel; if it is not marked with "F" or "b", it is a killed steel. For example, Q235-AF means grade A boiling steel with a yield point of 235MPa, and Q235-C means grade C killed steel with a yield point of 235MPa.