What is Q355 steel
Q355 steel Product Introduction
Q355 is a Chinese structural steel grade that is comparable to Q345 but has better strength. It is sometimes referred to as Q355B or Q355D, based on its chemical makeup and mechanical qualities. Q355 steel is intended to have a minimum yield strength of 355 MPa, which is much greater than the 345 MPa yield strength of Q345 steel.
Q355 steel has increased performance and is often utilized in structural applications that demand more strength. It is used in the construction industry to fabricate beams, columns, and other load-bearing structures. Q355 steel is also appropriate for making equipment components, bridges, and offshore structures.
The equivalent grades of Q355 steel vary depending on the international standards being used for comparison. Here are some commonly used equivalents:
ASTM A572 Gr 50: This is an equivalent grade to Q355 in the American ASTM standards. It has a minimum yield strength of 345 MPa and is commonly used in structural applications.
S355JR: This is an equivalent grade to Q355 in the European EN standards. It has a minimum yield strength of 355 MPa and is widely used in structural and engineering applications.
SM490B or SM490C: These are equivalent grades to Q355 in the Japanese JIS standards. They have minimum yield strengths of 325 MPa and 365 MPa, respectively, and are commonly used in structural applications.
Q355 steel Product Details
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 |
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