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Steel is tested for yield strength, tensile strength, elongation, and impact energy. For example, must maintain specific impact toughness at Chinese Standard GB/T Common Steel Grades
The standard underwent a major technical overhaul when the updated version was implemented on April 1, 2010. The following table summarizes the primary differences between the historic 1996 edition and the active 2009 standard: Feature/Specification GB/T 16270-1996 GB/T 16270-2009
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% .
: Large bridges, high-pressure vessels, and power plant equipment. Where to Find the GB/T 16270 PDF gb t 16270 pdf
The materials must be supplied in the quenched and tempered (Q&T) state.
When using GB/T 16270, also refer to:
: Canceled specifications for flexural property testing in favor of updated mechanical performance indexes. 4. Purchasing and Accessing the PDF Steel is tested for yield strength, tensile strength,
: The applicable maximum thickness of steel plates was extended from 100mm to 150mm .
When reviewing a GB/T 16270 PDF, engineers and procurement specialists must focus on three primary data areas: chemical composition, mechanical properties, and delivery conditions. 1. Chemical Composition
The standard is applicable to steel plates with a thickness not exceeding 150 mm . Where to Find the GB/T 16270 PDF The
The standard categorizes steel using designations based on their minimum yield strength. Common grades often include designations such as , Q890 , or Q960 , where the "Q" stands for the Chinese pinyin for yield point ( Qufu dian ), and the number represents the minimum yield strength in megapascals (MPa).
: Added high-performance grades Q800, Q890, and Q960 , while deleting the Q420 grade.
The standard classifies steel plates based on their minimum yield strength. The naming convention uses the letter "Q" (for qing , meaning yield) followed by the strength value in Megapascals (MPa). Common Grades: Minimum yield strength of 460 MPa. Q500: Minimum yield strength of 500 MPa. Q550: Minimum yield strength of 550 MPa. Q620: Minimum yield strength of 620 MPa. Q690: Minimum yield strength of 690 MPa. Quality Series (Impact Toughness):