GB/T 16270 is a standard related to the "Hot-rolled and forged alloy structural steel plates." This standard specifies the requirements, test methods, inspection rules, and marking, packaging, storage, and transportation for hot-rolled and forged alloy structural steel plates.
Free or Open Access: In some cases, standards might be available for free or open access, but this is less common for national standards like GB/T 16270. Open access might be through national library services or certain academic databases. gb t 16270 pdf
Steel Designations: Steel is named based on its minimum yield strength. For example, in the grade Q690D, "Q" stands for yield strength, "690" is the minimum yield value in MPa, and "D" represents the quality grade. What is GB/T 16270
| Grade | Yield Strength (MPa) Min | Tensile Strength (MPa) | Elongation (%) Min | | :--- | :--- | :--- | :--- | | Q460 | 460 | 550 - 720 | 17 | | Q500 | 500 | 590 - 770 | 17 | | Q550 | 550 | 670 - 830 | 16 | | Q620 | 620 | 710 - 880 | 15 | | Q690 | 690 | 770 - 940 | 14 | Open access might be through national library services