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Standards like GB/T 16270 are crucial for ensuring quality, safety, and compatibility across various industries. They provide detailed specifications to manufacturers, suppliers, and buyers to facilitate international trade and protect consumers.
If you're planning to use or reference this standard, ensure you obtain it from a reputable source to guarantee accuracy and compliance with applicable regulations.
GB/T 16270 specifies technical requirements for high-strength structural steel plates . The current version is GB/T 16270-2009 , which replaced the older 1996 version. Code of China Key Features and Scope Material Focus
: Specifically covers high-strength structural steel plates delivered in quenched and tempered (Q+T) conditions. Thickness Limits : Applicable to plates with a thickness not exceeding (extended from 100mm in the previous version). Reference Standards gb t 16270 pdf
: 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
), chemical composition, mechanical properties, dimensions, shape, weight, test methods, and quality certification. Chinese Standard GB/T Specific Requirements Steel Designations
: Composed of the Pinyin letter for yield strength ('Q'), the minimum yield strength value (e.g., 460), and a quality grade (C, D, E, or F). Mechanical Properties
: Includes specifications for yield strength, tensile strength, elongation, and Charpy V-notch impact energy at specific temperatures (e.g., 0°C to -60°C). Quality Grades If you're looking for a PDF version of
: Adds newer quality grades C and F for most designations to align with current industrial needs.
: Includes visual inspection for surface quality and optional ultrasonic testing (UT) if negotiated between buyer and seller. Chinese Standard GB/T Version History Primary Application GB/T 16270-2009 Quenched and tempered high-strength plates up to 150mm. GB/T 16270-1996
Heat-treated or controlled rolled plates and strips up to 100mm.
You can find official English translations and downloadable PDF versions through professional standards platforms like ChineseStandard.net Code of China mechanical property requirements for a particular grade like GB/T 16270-2009 English PDF The standard defines steel grades with minimum yield
Unlike regular structural steel, GB/T 16270 steels are quenched and tempered (Q+T). The PDF specifies that the steel must be heat-treated after rolling to achieve a martensitic or bainitic microstructure.
Steel is typically smelted using oxygen converter or electric furnace methods. It usually undergoes secondary metallurgy (vacuum degassing) to reduce impurities like sulfur and phosphorus, which are detrimental to weldability and toughness.
Note: I assume you want a concise content summary of the GB/T 16270 standard (PDF). Below is a structured overview covering typical sections found in Chinese GB/T steel standards. If you need the exact text or clause-by-clause reproduction, ask and I’ll provide an outline for requesting the official document.
GB/T 16270 is a Chinese national standard titled "High strength structural steel plates and strips for mechanical and general engineering purposes – Quenched and tempered."
The "GB" stands for Guobiao (national standard), and the "/T" indicates it is a recommended (as opposed to mandatory) standard. This specification covers hot-rolled, quenched, and tempered high-strength steel plates and strips primarily used in:
The standard defines steel grades with minimum yield strengths ranging from 460 MPa to 960 MPa, making them ideal for lightweight, load-bearing designs.