: It is primarily used in heavy machinery, building structures, and engineering equipment where weight reduction and high load-bearing capacity are critical. Status and Replacement
Steel plates produced under GB/T 16270 are used in a wide range of high-stress structural and mechanical applications. Common uses include:
): 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 (
Which standard you are comparing it against
The Standardization Administration of China (SAC) operates an official platform at openstd.samr.gov.cn that provides free access to many national standards. As of now, original Chinese standards (非采标) can be downloaded as PDFs, while those adopted from international standards may only be readable online. GB/T 16270 falls under this category.
Added in tiny fractions to refine grain structures during heat treatment.
): The ultimate stress the material can withstand before failing. Ensures the material deforms safely before snapping. Industrial Applications
Rapidly cooled then reheated to maximize hardness and durability.
Properties must meet the minimum values in the transverse direction.
: 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.
The steel grade designation follows a specific nomenclature: the letter followed by the specified minimum yield strength value (in MPa), and a quality suffix regarding impact energy.
) using Charpy V-notch impact tests to ensure the steel will not crack under freezing conditions. 4. Technical Delivery Conditions
The standard enforces a strict chemical blueprint to balance extreme strength with excellent weldability. The steel relies on micro-alloying elements rather than high carbon content. Key Chemical Elements Kept low to maintain welding integrity.
The official GB/T 16270 PDF can be purchased from the Standardization Administration of China (SAC) or authorized resellers like Chinese Standard Bookstore. Be cautious of free "scanned" copies online, as they may be outdated (check for revision year).