Q:How the strength grade of the fine-rolled rebar is judged?

Rebar by strength level for end coloring, the provisions are as follows: PSB785 not painted, PSB830 painted white PSB930 painted yellow, PSB1080 painted red. Rebar can be rolled on its surface strength level, diameter and other signs, can also be used to hang the label method, rebar by strength level to PSB785(ASTM A416 Grade 270), PSB830, PSB930, PSB1080, the diameter of millimeters to Arabic numerals. The content of the label is clear and clear, tied firmly. In addition to the above provisions, the packaging, marking and quality certification of steel bars should comply with the relevant provisions of GB/T2101. The standards appearing above are Chinese standards. In the United States, the steel bars of prestressed concrete structures are often specified by ASTM standards. According to some references, the approximate correspondences between PSB785, PSB830, PSB930, and PSB1080 and the American standards are as follows:

PSB785 can roughly correspond to ASTM A416 Grade 250.

PSB830 can roughly correspond to ASTM A416 Grade 270.

PSB930 can roughly correspond to ASTM A416 Grade 300.

PSB1080 can roughly correspond to ASTM A416 Grade 425.

Time：29/05/2023 09:22:08