Rebar is the common name for hot rolled ribbed steel bars. The grade of ordinary hot-rolled steel bar is composed of HRB and the minimum yield point of the grade. H, R, and B are the first letters of the three words Hotrolled, Ribbed, and Bars respectively.
Hot-rolled ribbed steel bars are divided into three grades: Grade II HRB335 (the old grade is 20MnSi), Grade III HRB400 (the old grades are 20MnSiV, 20MnSiNb, 20Mnti), and Grade IV HRB500.
The nominal diameter of the rebar is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, and 40 mm. Steel grades: 20MnSi, 20MnV, 25MnSi, BS20MnSi. Reinforcing bars are mainly subjected to tensile stress in concrete. Due to the action of ribs, deformed steel bars have greater bonding ability with concrete, so they can better withstand the action of external forces. Steel bars are widely used in various building structures. Especially large, heavy, light thin-walled and high-rise building structures.
d mm | weight kg/m | 4.25d mm | cm2 | Rebar type/d | |||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
10 | 0.616 | 43 | 0.785 | 1.570 | 2.355 | 3.140 | 3.925 | 4.710 | 5.495 | 6.280 | 7.065 | 7.850 | HRB335/10 |
12 | 0.888 | 51 | 1.131 | 2.262 | 3.393 | 4.524 | 5.655 | 6.786 | 7.917 | 9.048 | 10.179 | 11.310 | HRB335/12 |
14 | 1.208 | 60 | 1.539 | 3.078 | 4.617 | 6.156 | 7.695 | 9.234 | 10.773 | 12.312 | 13.851 | 15.390 | HRB335/14 |
16 | 1.578 | 68 | 2.011 | 4.022 | 6.033 | 8.044 | 10.055 | 12.066 | 14.077 | 16.088 | 18.099 | 20.110 | HRB335/16 |
18 | 1.998 | 77 | 2.545 | 5.090 | 7.635 | 10.180 | 12.725 | 15.270 | 17.815 | 20.360 | 22.905 | 25.450 | HRB335/18 |
20 | 2.466 | 85 | 3.142 | 6.284 | 9.426 | 12.568 | 15.710 | 18.852 | 21.994 | 25.136 | 28.278 | 31.420 | HRB335/20 |
22 | 2.984 | 94 | 3.801 | 7.602 | 11.403 | 15.204 | 19.005 | 22.806 | 26.607 | 30.408 | 34.209 | 38.010 | HRB335/22 |
25 | 3.853 | 106 | 4.909 | 9.818 | 14.727 | 19.636 | 24.545 | 29.454 | 34.363 | 39.272 | 44.181 | 49.090 | HRB335/25 |
28 | 4.834 | 119 | 6.158 | 12.316 | 18.474 | 24.632 | 30.790 | 36.948 | 43.106 | 49.264 | 55.422 | 61.580 | HRB335/28 |
32 | 6.313 | 136 | 8.042 | 16.084 | 24.126 | 32.168 | 40.210 | 48.252 | 56.294 | 64.336 | 72.378 | 80.420 | HRB335/32 |
36 | 7.990 | 153 | 10.179 | 20.358 | 30.537 | 40.716 | 50.895 | 61.074 | 71.253 | 81.432 | 91.611 | 101.790 | HRB335/36 |
40 | 9.865 | 170 | 12.566 | 25.132 | 37.698 | 50.264 | 62.830 | 75.396 | 87.962 | 100.528 | 113.094 | 125.660 | HRB335/40 |
45 | 12.485 | 191 | 15.904 | 31.808 | 47.712 | 63.616 | 79.520 | 95.424 | 111.328 | 127.232 | 143.136 | 159.040 | HRB335/45 |
50 | 15.413 | 213 | 19.635 | 39.270 | 58.905 | 78.540 | 98.175 | 117.810 | 137.445 | 157.080 | 176.715 | 196.350 | HRB335/50 |
55 | 18.652 | 234 | 23.758 | 47.516 | 71.274 | 95.032 | 118.790 | 142.548 | 166.306 | 190.064 | 213.822 | 237.580 | HRB335/55 |
60 | 22.192 | 255 | 28.274 | 56.548 | 84.822 | 113.096 | 141.370 | 169.644 | 197.918 | 226.192 | 254.466 | 282.740 | HRB335/60 |
70 | 30.206 | 298 | 38.485 | 76.970 | 115.455 | 153.940 | 192.425 | 230.910 | 269.395 | 307.880 | 346.365 | 384.850 | HRB335/70 |
80 | 39.462 | 340 | 50.265 | 100.530 | 150.795 | 201.060 | 251.325 | 301.590 | 351.855 | 402.120 | 452.385 | 502.650 | HRB335/80 |
90 | 49.942 | 383 | 63.617 | 127.234 | 190.851 | 254.468 | 318.085 | 381.702 | 445.319 | 508.936 | 572.553 | 636.170 | HRB335/90 |
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Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.