The materials of rectangular tubes and square tubes are generally carbon steel, alloy steel, stainless steel, etc. Among them, carbon steel rectangular tubes and square tubes are the most common, because of their high strength, good corrosion resistance and low cost, they are widely used in construction, machinery manufacturing and other fields.
| Basic size | Area | Weight | ||
| A | B | S | F/cm2 | G/kg·m- |
| mm | ||||
| 36 | 18 | 1.5 | 1.49 | 1.17 |
| 2 | 1.93 | 1.52 | ||
| 2.5 | 2.34 | 1.84 | ||
| 3 | 2.73 | 2.14 | ||
| 3.5 | 3.08 | 2.42 | ||
| 50 | 32 | 2 | 3.05 | 2.4 |
| 2.5 | 3.74 | 2.94 | ||
| 3 | 4.41 | 3.46 | ||
| 70 | 50 | 4 | 8.69 | 6.82 |
| 5 | 10.57 | 8.3 | ||
| 6 | 12.34 | 9.69 | ||
| 7 | 14 | 10.99 | ||
| 80 | 60 | 4 | 10.29 | 8.07 |
| 5 | 12.57 | 9.87 | ||
| 6 | 14.74 | 11.57 | ||
| 7 | 16.8 | 13.19 | ||
| 90 | 60 | 4 | 11.09 | 8.7 |
| 5 | 13.57 | 10.65 | ||
| 6 | 15.94 | 12.52 | ||
| 7 | 18.2 | 14.29 | ||
| 100 | 70 | 5 | 15.57 | 12.22 |
| 6 | 18.34 | 14.4 | ||
| 7 | 21 | 16.48 | ||
| 8 | 23.54 | 18.48 | ||
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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.
