What kind of steel does high quality non-alloy steel include?

What kind of steel does high quality non-alloy steel include?

1. High quality carbon steel for mechanical structure, such as the high quality carbon steel specified in GB 699.

2. Carbon steel for engineering structure, such as grade C and grade D steel as stipulated in GB 700.

3. Low-carbon structural steel for stamping sheet, such as high-quality carbon steel for production of sheet steel specified in GB 5213 and GB 3276.

4. Carbon steel for coating plate and strip, such as carbon steel for production of tin, galvanized, aluminum plate and thick plate specified in GB 2518, GB 2520, GB 4174, GB 5065 and GB 5066.

5. Carbon steel for boilers and pressure vessels, such as carbon steel for the production of carbon steel plates, steel strips and steel tubes as stipulated in GB 713, GB 3087, GB6653 and GB 6654.

6. Carbon steel for shipbuilding, such as those used in the production of carbon steel plates, steel tubes and sections as specified in GB 712, GB 5312 and GB 9945.

7. Carbon steel of high quality for railway, such as that stipulated in GB 2585 for heavy rail production；etc.