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: Developed by referring to international standards including EN 10025-6:2004 ISO 4950.3-2003 Technical Contents : Defines designations (e.g., Q460, Q690, Q890, Q960

is the Chinese National Standard for "High strength structural steel plates in the quenched and tempered condition."

is the Chinese national quality standard for high-strength low-alloy structural steel plates and strips . It dictates the manufacturing rules, chemical compositions, and mechanical capabilities for steel used in heavy engineering. Engineers, manufacturers, and steel procurement professionals globally reference this standard to ensure structural safety. 🛠️ Purpose and Core Applications

: Mandatory limits and evaluations for Carbon Equivalent Value (CEV) were introduced, along with optional Consultation Carbon Equivalent (CET) frameworks.