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Basic Info.
Product Description
The 12cr2mo seamless steel pipe is rolled with a solid tube blank after piercing, and the 12cr2mo seamless steel pipe is generally produced on an automatic pipe rolling unit. After checking and removing surface defects, the solid tube blank is cut into the required length, centered on the perforated end face of the tube blank, then sent to the heating furnace for heating, and pierced on the piercing machine.
12cr2mo seamless steel pipes are generally produced on automatic rolling mills. After checking and removing surface defects, the solid tube blank is cut into the required length, centered on the perforated end face of the tube blank, then sent to the heating furnace for heating, and pierced on the piercing machine. Spin and advance the solid blank inside the process of piercing holes under the influence with the roller as well as the end. Then the solid blank is hollow finally, which is called gross pipe. Send to the automatic pipe rolling machine to continue rolling. Finally, the wall thickness is adjusted by the equalizing machine, and the size is sized by the sizing machine to meet the specification requirements. It is a relatively advanced method to produce hot-rolled 12cr2mo seamless steel pipes by using continuous rolling mills.
12cr2mo seamless steel pipe is widely used. General-purpose P91 alloy pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipes or structural parts for conveying fluids.
There are three types of supplies according to different uses: a, supply according to chemical composition and mechanical properties; b, supply according to mechanical properties; c, supply according to hydraulic test. Steel pipes supplied by Types a and b, if used to withstand liquid pressure, are also subject to hydrostatic testing.
12cr2mo seamless steel pipe according to GB/T8162-2008
Specifications: The outer diameter of the hot-rolled tube is 32-630mm. Wall thickness 2.5 ~ 75mm. Cold-rolled (cold-drawn) tube outer diameter 5 ~ 200mm. Wall thickness 2.5 ~ 12mm.
Appearance quality: The inner and outer surfaces of steel pipes must not have cracks, folds, rolling folds, separation layers, hairlines and scarring defects. These defects should be completely removed, and the wall thickness and outer diameter must not exceed the negative deviation after removal.
Both ends of the steel pipe should be cut at right angles and deburred. Steel pipes with a wall thickness greater than 20mm are allowed to be cut by gas cutting and hot sawing. It is not necessary to cut the head after the agreement between the supply and demand parties.
Cold-drawn or cold-rolled precision 12cr2mo seamless steel pipe "surface quality" refers to GB3639-83.
Zhengde hot-rolled seamless steel pipe is a long strip of steel with a hollow section and no joints around it. The steel pipe has a hollow cross-section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes and automobile transmission shafts. , bicycle racks and steel scaffolding used in building construction, etc. The use of seamless steel pipes to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sets, etc., which have been widely used in steel pipes. Hot-rolled seamless steel pipe is also an indispensable material for various conventional weapons. Gun barrels, barrels, etc. must be made of steel pipes.
thick Φ | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 8 | 8.5 | 9 | 10 | 12 |
32 | 2.146 | 2.46 | 2.762 | 3.052 | 3.329 | 3.594 | 3.847 | 4.088 | ||||||
38 | 2.589 | 2.978 | 3.354 | 3.718 | 4.069 | 4.408 | 4.735 | 5.049 | ||||||
42 | 2.885 | 3.323 | 3.749 | 4.162 | 4.562 | 4.951 | 5.327 | 5.691 | ||||||
45 | 3.107 | 3.582 | 4.044 | 4.495 | 4.932 | 5.358 | 5.771 | 6.172 | ||||||
50 | 3.477 | 4.014 | 4.538 | 5.049 | 5.549 | 6.036 | 6.511 | 6.973 | 7.423 | 8.286 | 8.699 | |||
54 | 3.773 | 4.359 | 4.932 | 5.493 | 6.042 | 6.578 | 7.103 | 7.614 | 8.114 | 9.075 | 9.538 | |||
57 | 3.995 | 4.618 | 5.228 | 5.826 | 6.412 | 6.985 | 7.546 | 8.095 | 8.632 | 9.667 | 10.167 | |||
60 | 4.217 | 4.877 | 5.524 | 6.159 | 6.782 | 7.392 | 7.99 | 8.576 | 9.149 | 10.259 | 10.796 | |||
63.5 | 4.476 | 5.179 | 5.869 | 6.548 | 7.214 | 7.867 | 8.508 | 9.137 | 9.754 | 10.95 | 11.529 | |||
68 | 4.809 | 5.567 | 6.313 | 7.047 | 7.768 | 8.477 | 9.174 | 9.858 | 10.53 | 11.838 | 12.473 | |||
70 | 4.957 | 5.74 | 6.511 | 7.269 | 8.015 | 8.749 | 9.47 | 10.179 | 10.876 | 12.232 | 12.892 | 13.539 | 14.797 | 17.164 |
73 | 5.179 | 5.999 | 6.807 | 7.602 | 8.385 | 9.156 | 9.914 | 10.66 | 11.394 | 12.824 | 13.521 | 14.205 | 15.537 | 18.052 |
76 | 5.401 | 6.258 | 7.103 | 7.935 | 8.755 | 9.563 | 10.358 | 11.141 | 11.912 | 13.416 | 14.15 | 14.871 | 16.277 | 18.94 |
89 | 6.363 | 7.38 | 8.385 | 9.378 | 10.358 | 11.326 | 12.281 | 13.225 | 14.156 | 15.981 | 16.875 | 17.756 | 19.483 | 22.787 |
108 | 7.768 | 9.02 | 10.259 | 11.486 | 12.701 | 13.903 | 15.093 | 16.27 | 17.436 | 19.729 | 20.858 | 21.973 | 24.168 | 28.41 |
133 | 11.178 | 12.725 | 14.261 | 15.783 | 17.294 | 18.792 | 20.278 | 21.751 | 24.662 | 26.098 | 27.522 | 30.334 | 35.809 | |
159 | 13.422 | 15.29 | 17.146 | 18.989 | 20.821 | 22.639 | 24.446 | 26.24 | 29.791 | 31.548 | 33.293 | 36.746 | 43.503 | |
219 | 18.601 | 21.209 | 23.805 | 26.388 | 28.959 | 31.517 | 34.064 | 36.598 | 41.629 | 44.126 | 46.61 | 51.543 | 61.259 | |
273 | 23.262 | 26.536 | 29.797 | 33.046 | 36.283 | 39.508 | 42.72 | 45.92 | 52.283 | 55.445 | 58.596 | 64.86 | 77.24 | |
325 | 27.75 | 31.665 | 35.568 | 39.458 | 43.337 | 47.202 | 51.056 | 54.897 | 62.542 | 66.346 | 70.137 | 77.684 | 92.629 | |
355 | 38.897 | 43.158 | 47.406 | 51.641 | 55.865 | 60.076 | 68.46 | 72.634 | 76.796 | 85.082 | 101.507 | |||
377 | 41.339 | 45.871 | 50.39 | 54.897 | 59.391 | 63.873 | 72.801 | 77.246 | 81.679 | 90.508 | 108.018 | |||
426 | 46.777 | 51.913 | 57.036 | 62.147 | 67.246 | 72.332 | 82.468 | 87.518 | 92.555 | 102.592 | 122.519 | |||
450 | 71.093 | 76.475 | 87.203 | 92.549 | 97.882 | 108.511 | 129.621 | |||||||
480 | 75.902 | 81.654 | 93.122 | 98.837 | 104.54 | 115.909 | 138.499 | |||||||
530 | 83.917 | 90.286 | 102.987 | 109.319 | 115.638 | 128.24 | 153.296 | |||||||
630 | 99.947 | 107.549 | 122.716 | 130.281 | 137.833 | 152.902 | 182.89 |
The seamless steel pipe produced by the three-roll mill for hot-rolling seamless steel pipe has high precision. Because of the cross-rolling with the mandrel, the rolling action is repeated many times in one pass, which greatly improves the accuracy of the wall thickness and is not easy to produce. Defects such as scratches, ears, and green lines; the flexibility in production is large, and the pass size can be changed with the help of the clutch of the roll.
Standing inventory of carbon seamless tubes, seamless special-shaped tubes, alloy seamless tubes, precision tubes. Various types of seamless steel pipes with a specification of 5-426*0.5-60mm and a length of 2-16m. The cold-rolled precision bright tubes produced by our factory have smooth appearance, uniform wall thickness, no oxide layer, and high precision. The inner hole of the steel pipe can be divided into round type, spline type, plum blossom type, etc. It is widely used in automobiles, motorcycles, electric power, petrochemicals, ships, aerospace, bearings, pneumatic components, oil cylinders, boiler equipment, medical equipment, fitness equipment and other industries.
No matter how to choose the hot-rolled seamless steel pipe, its quality cannot be ignored. It must be noted that there should be no defects on the surface, such as small cracks or scars, etc., and that the thickness of the pipe wall is the same to ensure uniformity. The physical comparison is still very important. Only after the basic comparison of the physical objects is done, can the steel pipes that meet the needs be selected. The processing technology of each seamless steel pipe is different, which will also affect its application field. Now it is generally processed by cold drawing and hot rolling, and the processing effect of the two and the application of steel pipes will also have certain differences.
Hot-rolled seamless pipes specifically include low and medium pressure boiler steel pipes, high-pressure boiler steel pipes, seamless steel pipes for ships, petroleum cracking steel pipes, seamless steel pipes for high-pressure fertilizer equipment, oil jacket steel pipes, pipeline steel pipes, hollow sucker rods, and ordinary fluid steel pipes. , structural seamless steel pipes and imported alloy steel pipes, etc., with rich varieties and complete specifications, widely used in petroleum, chemical, electric power, boilers, ships, machinery and other industries, and have been sold all over the world.
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.