Q195 and Q235 are two commonly used grades of steel in China. Both of them are carbon structural steels and are widely used in various industries.
Q195 is a grade of steel with a carbon content of 0.06-0.12%. It is used in construction, machinery, and automobile industries, among others. It has a yield strength of 195 MPa and a tensile strength of 315-430 MPa. Q195 is generally used in low-stress applications because of its low strength. However, it is known for its good welding performance, forming properties, and ductility.
Q235 is a grade of steel with a carbon content of 0.14-0.22%. It is used in construction, shipbuilding, and machinery industries, among others. It has a yield strength of 235 MPa and a tensile strength of 375-500 MPa. Q235 is known for its good welding performance and high strength. It is commonly used in the manufacture of structural components and mechanical parts.
In terms of their chemical composition, both Q195 and Q235 have similar carbon and manganese content. However, Q235 has a higher content of silicon and sulfur, which leads to better overall performance. Q235 also has a higher overall quality because of its more advanced production process.
When it comes to cost, Q195 is generally less expensive than Q235. The price difference is mostly due to the difference in production processes, with Q235 being the more expensive grade because of its higher quality.
In summary, Q195 and Q235 are both widely used carbon structural steels in China, with similar composition but different properties. Q195 is generally used in low-stress applications, while Q235 is used in structural components and mechanical parts. Q235 is considered the higher quality of the two grades, but it is also more expensive. Understanding the differences between these two grades can help manufacturers choose the right steel for their specific applications.