Grades: Includes high-strength grades like Q460, Q500, Q550, Q620, Q690, Q800, Q890, and Q960.
| GB/T 16270 | International Equivalent | Notes | | :--- | :--- | :--- | | | S460Q (EN 10025-6), A514 Grade B (ASTM) | Very close match. | | Q550 | S550Q (EN 10025-6) | Direct mechanical equivalence. | | Q690 | S690Q (EN 10025-6), ASTM A514 Grade Q | The most common interchangeable grade. | | Q960 | S960Q (EN 10025-6) | Niche applications; careful of CEV differences. | gb t 16270 pdf
High strength structural steel plates and strips Chinese Name: 高强度结构用调质钢板 Current Status: The active version is GB/T 16270-2009 (Replacing GB/T 16270-1996). Grades: Includes high-strength grades like Q460, Q500, Q550,
If you search for "GB/T 16270 PDF free download," you will find many sketchy websites. | | Q690 | S690Q (EN 10025-6), ASTM