Q235 is a common carbon structural steel. The main components of Q235 include carbon, manganese, silicon, sulfur and phosphorus. Its carbon content is usually between 0.10% and 0.20%, and its manganese content is between 0.30% and 0.70%, while the sulfur and phosphorus content should be controlled at a low level to ensure the toughness and weldability of the steel.
In terms of physical properties, the yield strength of Q235 is usually around 235 megapascals (MPa), hence the name "Q235". Its tensile strength is generally between 370 and 500 MPa, and its elongation is above 20%. These properties enable Q235 to maintain good deformation capacity when subjected to loads, making it suitable for the manufacture of load-bearing components. The hardness of Q235 is relatively low, making it easy to process and form.

Q235 steel can be processed in a variety of ways, including hot rolling, cold rolling, forging, etc.

When the content of alloy elements in the steel is uneven or the distribution of alloy elements is uneven, it will affect the chemical composition of the steel. If the carbon content in the steel is uneven or the distribution of other alloy elements is unbalanced, it will cause cracking at the end of the round steel.

The causes of round steel cracks may include uneven heating temperature, too fast heating speed, and low rolling temperature.

Stainless steel industrial plate usually refers to the product obtained from the steel mill after hot rolling. The surface of this plate is relatively rough and not shiny, and it is often called No. 1 surface.
Stainless steel 2B plate is a cold-rolled plate that has been further processed. On the basis of No. 1 plate, a series of processes such as cold rolling, annealing and pickling are used to make the surface of the plate present an appropriate glossiness, which is neither mirror nor completely matte, which is what we usually call 2B surface.

The main difference between them:
Surface glossiness:
The surface of stainless steel industrial plate is relatively rough and matte, while stainless steel 2B plate is further processed, and the surface has a certain glossiness and is more beautiful. This is the most intuitive difference between the two.
Toughness and flatness:
Because 2B plate has undergone more processing and treatment, it performs better in toughness and surface flatness. This makes 2B plate more advantageous in some application scenarios with high requirements for material performance.
Price:
Stainless steel industrial plate has a shorter processing process and relatively lower cost, so the market price is more affordable. The 2B plate has undergone more processing and has a higher cost, so the price is relatively high.
Thickness:
The thickness range of stainless steel industrial plates is large and can usually be customized within a wide range. The thickness of 2B plates is relatively precise and is usually selected within a certain range.