Gb T 16270 Pdf Here

The exact you are evaluating (e.g., Q690D, Q460E) The thickness of your required steel plate

The table below summarizes the typical chemical composition limits for different grades under GB/T 16270. Based on the latest available data, here is a comparison of the maximum chemical element content for different steel grades (values in wt.%):

Once you open your , pay close attention to three specific tables: gb t 16270 pdf

The 2009 update represents a significant modernization of the standard. The previous version, GB/T 16270-1996, covered a different range of steel grades and processing states (including normalized and controlled-rolled products). The 2009 version focuses exclusively on the quenched and tempered condition, reflecting advances in steelmaking technology and the industry's demand for higher performance.

Even with the official in hand, professionals make errors. Avoid these pitfalls: The exact you are evaluating (e

is a Chinese national standard titled "High strength structural steel plates and strips for mechanical and general engineering purposes – Quenched and tempered."

Engineering teams leverage the official text of this standard to ensure heavy-duty equipment handles maximum structural loads safely. Standard Evolution: GB/T 16270-1996 vs. GB/T 16270-2009 The 2009 version focuses exclusively on the quenched

These elements are controlled to ensure proper hardenability, strength, and weldability. For instance, adding grain-refining elements such as vanadium (V), niobium (Nb), and titanium (Ti) helps improve toughness. The total content of these elements must not exceed 0.10%, 0.06%, and 0.20%, respectively, unless aluminum (Al) is added at a minimum of 0.015% .

GB/T 16270-2009 is a vital document for anyone involved in specifying, manufacturing, or using high-strength quenched and tempered steel plates in China.

The standard is supervised by the China Iron and Steel Association and is under the jurisdiction of the National Technical Committee for Steel Standardization. Its current status is , meaning the 2009 version is the one you must follow. This standard applies to quenched and tempered (Q+T) steel plates with a maximum thickness of 150 mm , designed for use as high-strength structural components.

For example, a steel plate (often supplied by distributors in the Moscow region) has a minimum yield strength of 690 MPa. Technical Delivery Conditions