Complete List of Steel Bar Grade Symbols

Release time:

2023-05-18

Medium and low pressure steam boiler pipe is made of steel ingot or solid pipe blank through perforation, and then made by hot rolling, cold rolling or cold drawing. Seamless steel pipe has a tight position in China’s steel pipe industry. According to incomplete statistics, there are about 240 seamless pipe manufacturing enterprises in China, about 250 seamless steel pipe units, and an annual output of about 4.5 million tons. From the perspective of caliber, ＜ φ 76, accounting for 35%, ＜ φ 159-650, accounting for 25%. In terms of types, 1.9 million tons of general purpose pipes, accounting for 54%; 760000 tons of kerosene pipes, accounting for 5.7%; 150000 tons of hydraulic prop and tight pipe, accounting for 4.3%; Stainless pipe, bearing pipe and automobile pipe are 50000 tons, accounting for 1.4%.

Rebar marking in the graphical method of reinforced concrete components:

Generally, the method of using outgoing lines is used, and there are two specific annotation methods:

1。 Number, diameter, and grade of labeled steel bars: 3 Ф 203: represents the number of steel bars

Ф： Denotes the diameter symbol of the steel bar grade

20: Denotes the diameter of the steel bar

2。 Label the grade, diameter, and center distance of adjacent steel bars

Ф 8 @ 200：

Ф： Denotes the diameter symbol of the steel bar grade

8: Denotes the diameter of the steel bar

@: Equal center distance symbol 200: Center distance between adjacent steel bars (≤ 2

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Complete List of Steel Bar Grade Symbols