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: gb t 16270 pdf
The standard defines steel grades with minimum yield strengths ranging from 460 MPa to 960 MPa, making them ideal for lightweight, load-bearing designs. GB/T 16270 is a Chinese national standard titled
| Parameter | Details | |-----------|---------| | Steel Grades | e.g., Q460E, Q500D, Q550D, Q620D, Q690D, Q890D, Q960D (Q = yield strength in MPa, D/E = impact temperature grade) | | Heat Treatment | Quenched + Tempered (Q&T) | | Yield Strength | 460–960 MPa minimum | | Tensile Strength | Typically 550–1100 MPa depending on grade | | Elongation | Minimum 14–18% (varies by grade) | | Impact Energy | 27 J or 40 J at -20°C, -40°C, or -60°C | | Cold Bending | Mandatory for formability verification | The standard defines steel grades with minimum yield
GB/T 16270-2009 is the Chinese national standard specifying the requirements for high-strength structural steel plates supplied in the quenched and tempered (Q&T) condition. This standard replaces the older 1996 version and aligns closely with international standards such as EN 10025-6 (European) and ASTM A514/A517 (American).
The standard applies to steel plates with a nominal thickness ranging from 3mm to 100mm, primarily used for welded structures in construction, mining machinery, cranes, and bridges.
The steel grade designation follows a specific nomenclature: the letter "Q" followed by the specified minimum yield strength value (in MPa), and a quality suffix regarding impact energy.