SHANDONG ZHENGDEMETAL MANUFACTURING CO.,LTD.
Quality first: production and inspection in strict accordance with production standards; Price advantage: discounts based on real market prices; Transaction security: There will be no loss of customer
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Hot rolled seamless api steel pipe deformation process can be summarized as three stages: extension, perforation and finishing. Hot rolled seamless steel pipes is relative to the cold-rolled, cold rolling is below the recrystallization temperature of the rolling and hot rolled is carried out at above the recrystallization temperature of the rolling. Hot rolled seamless steel pipe can damage the refinement of the crystal grains of the steel, cast microstructure of the steel ingot and eliminate the defects of the microstructure so that the the steel organization compacting, improves the mechanical properties. This improvement is reflected in the rolling direction so that the steel is no longer at a certain extent isotropic; pouring the formation of bubbles, cracks and osteoporosis, under high pressure and temperature can also be welded together.
Hot Rolled Steel Pipes (Seamless Tube) in different size, specifications, grades & thickness as per the client's requirements. The range offered by tubes is available as per the international & national standard and can be available from us at affordable prices. These pipes are used in various application industry like shipbuilding, power plants, oil and gas, automotive, sugar mills and distilleries, cement and construction industries etc.
| steel grade | color sign | Yield Strength | Highest | Lowest | Rc | Elongation | API | |
| Psi | MPa | MPa | MPa | (max) | % | scope of application | ||
| H-40 | Black | 40 | 276 | 552 | 414 | 5A | ||
| J-55 | Green | 55 | 379 | 552 | 517 | 22.5 | 5A | |
| K-55 | Green | 55 | 379 | 552 | 665 | 18 | 5A | |
| N-80 | Red | 80 | 552 | 758 | 689 | 17 | 5A | |
| C-75 | Blue | 75 | 517 | 620 | 665 | 18 | 5AC | |
| L-80 | Brown/Red | 80 | 552 | 665 | 665 | 23 | 18 | 5AC |
| C-90 | Purple | 90 | 620 | 725 | 690 | 25.4 | (5AC) | |
| C-95 | Brown | 95 | 665 | 760 | 720 | 25.4 | 16.5 | (5AC) |
| P-110 | White | 110 | 758 | 965 | 865 | A5X | ||
| Q-125 | White | 125 | 861 | 1040 | 930 | 18 | (5AQ) | |
Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
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.