Gb T 16270 Pdf Site
Title: 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).
GB/T 16270 bridges the gap between high strength and cold formability, enabling lighter, safer, and more durable steel structures. The standard’s PDF document is the definitive reference for anyone specifying, testing, or fabricating quenched and tempered high-strength steels for demanding cold-formed applications.
GB/T 16270 standard is a Chinese national technical specification for high-strength structural steel plates delivered in a quenched and tempered condition. It is primarily used in heavy industry to ensure materials can withstand extreme mechanical stress and low temperatures. Chinese Standard GB/T Core Story of the Standard Purpose & Development
: The standard was developed to unify the technical requirements for high-yield strength steels, specifically those with yield strengths ranging from 420 MPa to 960 MPa . The current version, GB/T 16270-2009
, replaced the older 1996 version and aligned more closely with international standards like ISO 4950.3 EN 10025-6 The "Quenched & Tempered" Method
: The "story" of this steel is its heat treatment. Plates are heated then rapidly cooled (
) to harden them, followed by reheating to a lower temperature ( ) to restore toughness and reduce brittleness. Practical Applications : You will find steel produced under this PDF standard in: Mining Machinery : Such as electric shovels and mine dump trucks. Construction Equipment
: Used for cranes, excavators, and bulldozers that require high load-bearing capacity. Large Infrastructure
: Critical for bridge construction and high-pressure vessels where structural failure is not an option. Chinese Standard GB/T Key Technical Specifications GB/T 16270-2009 English PDF gb t 16270 pdf
GB/T 16270 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 current valid version is GB/T 16270-2009, which replaced the original 1996 standard on April 1, 2010. GB/T 16270-1996 GB/T 16270-2009 Primary Scope Plates and strips Plates only (strips canceled) Max Thickness Up to 100mm Up to 150mm Steel Grades Q420 to Q690 Adds Q800, Q890, Q960; deletes Q420 Quality Grades General grades Adds C and F grades (except for Q460) Delivery State Heat-treated/Controlled rolled Quenched and Tempered (Q+T) Technical Requirements
The standard mandates specific criteria to ensure material integrity and performance:
Designation Naming: Grade names start with "Q" (for qufu, meaning yield), followed by the minimum yield strength (e.g., Q690) and a quality grade letter (C, D, E, or F) indicating impact testing temperature.
Mechanical Properties: Includes tensile strength, elongation, and Charpy pendulum impact testing. For instance, Q690E is a low-temperature grade tested for impact at -40°C.
Surface Quality: The plate must be free of cracks, scabs, and lamination. Minor defects can be cleared if they don't reduce thickness below the minimum tolerance.
Testing: Ultrasonic testing (per GB/T 2970) may be required by contract for internal flaw detection. International Equivalents
GB/T 16270 grades are often compared to European and American standards for global procurement: Title: High strength structural steel plates and strips
Q690E (GB/T 16270) is generally equivalent to EN 10025-6 S690QL.
Higher grades like Q960 are comparable to extreme-high-strength structural steels used in mobile crane booms. How to Access the PDF
Official full-text PDF copies in English or Chinese can be purchased from authorized vendors such as the Chinese Standard Online Store or Code of China. Some research repositories like Scribd may host preview versions. GB/T 16270-2009 English PDF
Understanding the GB/T 16270 Standard: A Guide to High-Strength Steel
In the world of heavy-duty engineering and construction, the materials used can determine the long-term success of a project. One of the most critical standards for high-performance materials in China is GB/T 16270, which outlines the requirements for high-strength structural steel plates in the quenched and tempered condition.
Whether you're an engineer, a steel buyer, or a student, here’s a breakdown of what this standard covers and why it’s vital for modern industry. What is GB/T 16270?
The current valid version, GB/T 16270-2009, was implemented on April 1, 2010, replacing the older 1996 version. It specifies the designations, dimensions, technical requirements, and testing methods for steel plates with a thickness of up to 150mm.
This standard is often used for heavy machinery, mining equipment, and large-scale steel structures where high yield strength and durability are non-negotiable. Key Technical Specifications GB/T 16270 standard is a Chinese national technical
The standard covers several essential areas for ensuring the quality and performance of structural steel:
Steel Designations: Steel is named based on its minimum yield strength. For example, in the grade Q690D, "Q" stands for yield strength, "690" is the minimum yield value in MPa, and "D" represents the quality grade.
Delivery Condition: Plates are delivered in a quenched and tempered (Q+T) state, which provides a unique balance of high strength and excellent toughness.
Mechanical Properties: It defines requirements for tensile strength, elongation, and impact energy (Charpy V-notch test) even at low temperatures, such as -40°C or -60°C for specific grades.
International Alignment: 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
The GB/T 16270 standard includes a wide range of grades to suit different structural needs:
Once you open your GB/T 16270 PDF, pay close attention to three specific tables: