Gb T 16270: Pdf ((hot))
Specifically covers high-strength structural steel plates.
Q460 and Q550: Frequently used in large-scale building structures and high-performance bridges.
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
According to the English version of GB/T 16270-2009 , the standard outlines several critical parameters: gb t 16270 pdf
Grades: Includes high-strength grades like Q460, Q500, Q550, Q620, Q690, Q800, Q890, and Q960.
Note: The suffix letters (D, E) denote impact test temperatures: D = -20°C, E = -40°C.
: Grades are often followed by letters (C, D, E, F) indicating impact test temperatures, such as , which requires impact testing at negative 40 raised to the composed with power C Mechanical Properties Specifically covers high-strength structural steel plates
): Ranges from 460 MPa up to 890 MPa or higher depending on the grade. Typically spans from 550 MPa to well over 1000 MPa. Elongation (
(examples): Q460D, Q550D, Q690D, Q890D, Q960D — where the number indicates minimum yield strength (MPa).
Each grade is paired with a quality letter (such as C, D, E, or F) indicating Charpy V-notch impact testing temperatures: Tested at -20∘Cnegative 20 raised to the composed with power C E: Tested at -40∘Cnegative 40 raised to the composed with power C F: Tested at -60∘Cnegative 60 raised to the composed with power C (essential for arctic or deep mining applications) 🏭 Delivery Conditions and Heat Treatment Some research repositories like Scribd may host preview
Once you have the standard, focus on these sections:
: 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
| Quality Grade | Test Temperature | Impact Energy (Akv) Min | | :--- | :--- | :--- | | | 0°C | 34 J (for Q690) | | D | -20°C | 34 J (for Q690) | | E | -40°C | 34 J (for Q690) |