What is the difference between Q245R steel plate and 20R steel plate?

They are made of different materials:
1. Q245R steel plate material: Q245R steel plate boiler pressure vessel steel is a large class of steel plate - boiler plate.
2. Material of 20R steel plate: 20R steel plate and Q345R is a practical steel plate for container; it belongs to carbon structural steel.

They have different characteristics:
1. Q245R steel plate features: durable, high strength, etc.
2. 20R steel plate features: good comprehensive mechanical properties and process performance. The content of phosphorus and sulfur is slightly lower than that of Q345R(16Mn) steel. In addition to the requirement of higher tensile strength and elongation than Q345 (16Mn) steel, it is also required to ensure the impact toughness. At present, it is the most widely used and the most used special steel plate for pressure vessels in China.

The application of Q245R steel plate and 20R steel plate is different:
1. Application of Q245R steel plate: it is mainly used for pressure vessel. According to the different use, temperature and corrosion resistance, the vessel plate materials should be different.
2. Application of 20R steel plate: it is mainly used for pressure vessel. According to the different use, temperature and corrosion resistance, the material of vessel plate should be different.