is the Chinese National Standard for High-strength structural steel plates delivered in the quenched and tempered (Q&T) condition. It is specifically used for heavy-duty structural components like mining equipment, cranes, and offshore rigs that require high load-bearing and impact resistance. Key Standard Details (2009 vs. 1996 Version)
The 2009 revision was formulated by referencing international standards like EN 10025-6 and ISO 4950.3 to ensure Chinese steel meets global performance expectations. Common Steel Grades gb t 16270 pdf