Q355B material is a low-alloy high-strength structural steel, where "Q" means yield strength, 355 means that the yield strength of this steel is 355MPa, and its yield value will decrease as the thickness of the material increases. Q355B steel plate is widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc.
Chemical composition(%) of Q355B steel
| Material | C max. | Si max. | Mn max. | P max. | S max. | Cr max. | Ni max. | Cu max. | N max. |
| Q355B | 0.20 | 0.55 | 1.60 | 0.030 | 0.030 | 0.30 | 0.30 | 0.40 | 0.012 |
Q355B material heat treatment
The heat treatment process can significantly improve the physical properties of steel, improve the compressive strength, ductility and service life of parts, and improve the hardness and wear resistance. Therefore, critical equipment parts and special tools must be quenched and tempered. The quenching and tempering treatment can also improve the production and processing performance of the product workpiece, thereby improving the production efficiency and production processing quality. Therefore, the Q355B steel quenching and tempering treatment plays a very crucial role in the production of machinery and equipment manufacturing industry.
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