Who is the most detailed material description of the alloy pipe?

The biggest advantage of alloy pipes is that it can be recovered 100%, which is in line with the national strategy of environmental protection, energy conservation, and resources. National policies encouraged the application field of high -pressure alloy pipes.
The proportion of my country's alloy pipeline consumption accounts for only half of the total steel. The expansion of the use of alloy pipelines provides a broader space for the development of the industry. According to the research of the Alloy Management Branch of the China Special Steel Association, the average demand for high-voltage alloy pipes in my country in the future can increase by 10-12%.
1. Seamless steel pipes
The is divided into two types: hot rolling (squeezing) seamless steel pipes and cold pipes (rolled) seamless steel pipes due to their different manufacturing processes. Cold pull (rolled) tube is divided into two types: circular tube and alien tube.
a. Overview of process flow
The hot rolling (squeezing seamless steel pipe): round tube blank → heating → perforation → three -rolling rolling, continuous rolling or squeezing → fixed diameter (or minus diameter) → cooling → blank → blank Tube → straight → hydraulic test (or detecting) → mark → enter the warehouse.
This cold pull (rolled) seamless steel pipe: round tube blank → heating → perforation → head -off → pickling → oil (copper plating) → multiple cold pull -up (cold rolling) → heat treatment → heat treatment → straight → hydraulic test (exploring) → mark → enter the warehouse.
B. Seamless steel pipes are divided into several varieties due to their different uses:
GB/T8162-1999 (seamless steel pipe). It is mainly used for general structure and mechanical structure. Its representative material (card): carbon steel 20 and 45 steel; alloy steel Q345, 20CR, 40CR, 20CRMO, 30-35CRMO, 42CRMO, etc.
GB/T8163-1999 (seamless steel pipe for transportation). Mainly used to transport fluid pipes on engineering and large equipment. Representative materials (cards) are 20, Q345, etc.
GB3087-1999 (seamless steel pipe for low-mid-pressure boiler). It is mainly used for the pipelines of industrial boilers and life boilers to transport low -medium pressure fluids. The material is No. 10 and 20 steel.
GB5310-1995 (seamless steel pipe for high-pressure boiler). It is mainly used for high -temperature and high -voltage conveying fluids and pipelines on the boiler of power stations and nuclear power stations. The material is 20g, 12Cr1movg, 15CRMOG, etc.
GB5312-1999 (seamless steel pipe for carbon steel and carbon and manganese steel for ships). It is mainly used for the I, II -level pressure resistance tubes of the ship boiler and the heat device. The material is 360, 410, 460 steel, etc.
It is mainly used to transport high -temperature and high -pressure fluid pipes on the fertilizer equipment. The material is 20, 16MN, 12CRMO, 12CR2MO, etc.
GB9948-1988 (seamless steel pipe). It is mainly used for the boiler, heat exchanger and its transportation pipeline of the oil smelter. Its representative materials are 20, 12CRMO, 1Cr5mo, etc.
GB18248-2000 (seamless steel pipe for gas cylinders). It is mainly used to make various gas and hydraulic gas cylinders. Its representative material is 37mn, 34mn2V, 35CRMO, etc.
GB/T17396-1998 (seamless steel pipe with hot rolling pillars). It is mainly used to make coal mine hydraulic stents, cylinders, columns, and other hydraulic cylinders and columns. Its representative material is 20, 45, 27simn, etc.
GB3093-1986 (high-pressure seamless steel pipe for diesel engines). It is mainly used for high -pressure oil pipes for diesel engine jet systems. Its steel pipe is generally cold pipe and its representative material is 20A.
GB/T3639-1983 (cold or cold-rolled precision seamless steel pipe). It is mainly used for mechanical structure, carbon pressure equipment, and steel pipes with high size accuracy and good surface smoothness. It represents material 20, 45 steel, etc.
GB/T3094-1986 (cold pull seamless steel pipe alien steel pipe). It is mainly used to make various structural components and parts, and its material is high -quality carbon structure steel and low alloy structure steel.
GB/T8713-1988 It is mainly used to make cold or cold -rolled seamless steel pipes with precision inner diameter size for hydraulic and pneumatic cylinders. Its representative material is 20, 45 steel, etc.
GB13296-1991 It is mainly used for boilers, heat exchangers, condenser, catalytic pipes, etc. of chemical enterprises. High temperature, high pressure, corrosion -resistant steel pipes used. Its representative material is 0CR18NI9 ....
GB/T14975-1994 (seamless steel pipe for stainless steel). It is mainly used for the resistance, acid corrosion of the general structure (hotel, hotel decoration) and the mechanical structure of chemical enterprises, and have a certain intensity steel pipe. Its representative material is 0-3Cr13, 0CR18NI9, etc.
GB/T14976-1994 (seamless steel pipe for stainless steel for fluid transport). It is mainly used to transport pipelines for corrosive media. The material is 0CR13, 0CR18NI9, etc.
YB/T5035-1993 It is mainly used to make high -quality carbon structural steel and alloy structure steel hot -rolled steel pipes for the high -quality carbon structural steel and alloy structure for driving bridge shells. Its representative materials are 45, 45MN2, 40Cr, 20CRNI3A, etc.
API SPEC5CT-1999 (sleeve and oil pipe specifications), which is the preparation and release of the American Petreleum Instire (API ") in all parts of the world. Among them: sleeve: extend from the ground surface into the drilling, as the tube lined by the well, the tube is connected by the hoop. The main materials are steel grades such as J55, N80, P110, as well as C90 and T95 such as C90 and T95 corroded by sulfide. Its low steel grade (J55, N80) can be welded steel pipes. Oil pipe: inserted into the pipe of the pipe from the surface of the ground to the tube of the oil layer. The effect was so the oil pumping machine transported the oil layer oil to the ground through the oil pipe. The main materials are J55, N80, P110, and C90, which are corroded by hydrogen sulfide, and the United States Petroleum Institute is compiled and published in the world.
This pipeline pipeline: It is to transport the oil, gas or water on the ground to oil and natural gas industry enterprises through pipeline pipes. The pipelines include seamless and welded pipes. The tubes include flat end, threaded end, and laboratory end. The connection method is end welding, connection connection, and inheritance connection. The main material of the tube is B, X42, X56, X65, X70 and other steel grades.
(2) Welding steel pipe
The billet used for welding steel pipes is steel plates or tape steel. Due to the different welding processes, it is divided into furnace welding pipes, electric welding (resistor welding) pipes and automatic arc welded pipes. Due to the difference in welding forms, it is divided into two types: straight welded pipes and spiral welded pipes. Because of its end shape). It is mainly used to transport water, air, air, oil, heating hot water, or steam such as low pressure fluids and other use tube. Its representative material Q235A -grade steel.
GB/T3092-1993 It is mainly used to transport water, air, air, oil, heating hot water, or steam such as low pressure fluids and other use tubes. Its representative material is: Q235A -grade steel.
GB/T14291-1992 It is mainly used for mines to welded steel pipes with straight seams of wind, drainage, and shafts. Its representative material Q235A, B -class steel. GB/T14980-1994 (large diameter welding steel pipe for low-voltage fluid transportation). It is mainly used to transport low -pressure fluids such as water, sewage, gas, air, heating steam and other purposes. Its representative material Q235A -grade steel.
GB/T12770-1991 (stainless steel tube for mechanical structure). It is mainly used for machinery, cars, bicycles, furniture, hotels and restaurants, and other mechanical components and structural parts. Its representative materials 0CR13, 1CR17, 1CR18NI9, etc.
GB/T12771-1991 (stainless steel welding steel pipe for fluid transport). It is mainly used to transport low corrosive media. The material is 0CR13, 0CR19NI9, 00CR17, etc.
16mn alloy tube is: 16MN is called low alloy high-strength structural steel low alloy high-strength structural steel: carbon content is 0.1%-0.25%, add major alloy elements manganese, silicon, 钒, 铌, titanium, etc.; The total amount of alloys u003C3%. Divided into 4 levels such as 300, 350, 400 and 450MPa. There are mainly Q295, Q345, Q390, Q420, Q460. : "Q" is a Chinese pinyin capital header of the word "flexion". After that, the number is the minimum yield point (σs) value of the brand. To low and accompany the changes in carbon and manganese, they are divided into four, B, C, and D. Among them, A and B -class steels are usually called 16MN
The classification of aluminum alloy tubes
1xxx's alloy series dominated by pure aluminum.
2xxx aluminum alloy with copper as the main alloy element
3XXX is aluminum alloy with manganese as the main alloy element
This alloy pipe: Titanium alloy pipe is mainly used for aviation. It is a special alloy pipe for high -hardness and high temperature resistance.
4xxx aluminum alloy with silicon as the main alloy element
5xxx aluminum alloy with magnesium as the main alloy element
6xxx aluminum alloy with magnesium and silicon as the main alloy element
7xxx to use Zinc is an aluminum aluminum aluminum
This alloy tube is both related and different from the seamless tube, and cannot be mixed.
The alloy pipe is defined by the steel pipe according to the production materials (that is, the material). As the name suggests, the seamless pipe is defined by the steel pipe according to the production process (seamless), which is different from the none of the none The sewing tube is a sewing tube, including a straight seam welding pipe and a spiral tube.
The materials of the alloy tube are roughly:
16-50mn, 27simn, 40Cr, 12-42Crmo 1Cr5mo P5 T5
16mn 12cr1mov T91 27SIMO 15CRMO 10CRMO9 Mo3 15CRMOV 35CRMOV 45CRMOV 45CRMOV 45CRMOV 45CRMOV 45CRMOV 45crmoV The use of alloy pipes: The alloy pipe has a hollow section, which is used as a pipeline for transporting fluids, such as the pipelines of petroleum, natural gas, gas, water, and certain solid materials. Compared with solid steel such as alloy steel pipes and round steel, when the bending resistance is the same, the weight is lighter. The alloy steel pipe is an economic section steel that is widely used in manufacturing structures and mechanical parts, such as petroleum drilling rods and automobile transmission. A shaft, bicycle frame, and steel scaffolding used in construction. The use of alloy steel pipes to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing hours, such as rolling bearing circles and jack tops. Alloy steel pipes are also indispensable materials for various conventional weapons, and barrels, cannons, etc. are made of steel pipes. The alloy steel pipe can be divided into round tubes and different types of tubes according to the different shape of the cross -sectional area. Due to the condition of equal perimeter, the circular area is the largest, and more fluids can be transported with circular tubes. In addition, when the ring section is underneath the internal or external radial pressure, the force is evenly stressed. Therefore, most steel pipes are round pipes.

The steel pipe weight calculation formula

[(outer diameter-wall thickness)*wall thickness]*0.02466 = kg/meter (weight per meter) alloy pipe size and allowable deviation deviation
The deviation level
The standardized outer diameter allows deviation

d1
± 1.5%, minimum ± 0.75 mm
nd2
± 1.0% Essence The minimum ± 0.50 mm

d3
± 0.75%. The minimum ± 0.30 mm

d4
± 0.50%. The minimum ± 0.10 mm

The elements and symbolic meanings in the alloy steel
The brand of steel is referred to as steel number. It is the name of each specific steel product. A common language. my country's rigidity representation method generally uses the method of combining Chinese pinyin letters, chemical symbols and Arabic numerals.
It, we will specifically introduce the elements and symbolic meaning in the alloy steel
1. The two -digit number starting with the steel number represents the carbon content of the steel, which is expressed in the average carbon content, such as 40Cr.
2. The main alloy elements in the steel, except for individual micro -alloy elements, are generally represented by a few percent. When the average alloy content is u003C1.5%,
in the steel number generally only marked the element symbol without indicating the content, but in special circumstances, it is easy to cause confusion. ,
, for example, the steel number "12CRMOV" and "12CR1Mov", the former is 0.4-0.6%, the latter is 0.9-1.2%, all of which are the same
At the time of ≥2.5%, ≥3.5%... the content should be marked after the element symbol, which can be represented as 2, 3
, 4 ... and so on. E.g.
3. The alloy elements such as the 钒 v, titanium TI, aluminum AL, boron B, rare earth RE and other alloy elements in the steel are all micro -alloy elements. Essence For example, 20mnvb steel is 0.07-0.12%, and boron is 0.001-0.005%.
4. Advanced high -quality steel should add "A" at the end of the steel number to distinguish the general high -quality steel.
5. Special -purpose alloy structure steel, steel number crown (or suffix) represents the symbol of the steel type. For example, 30CRMNSI steel for rivet rivet,
steel number is represented.
6. For professional low alloy high -strength steel, it should be indicated at the end of the steel number. For example, 16mn steel, special steel for bridge is "16mnq", steam
The special steel species of the bicycle beams are "16mnl", and the special steel species of pressure vessels are "16mnr".
In the above learning, we not only understand the meaning of various symbols in alloy steel, but more importantly, let us understand the inner differences of different material alloy steel.
The properties of alloy: 1 Hardness is large, and the hardness of the alloy is generally greater than the hardness of the metal of the ingredients of the alloy. Light alloys made of aluminum or magnesium are often much greater than aluminum or magnesium. Sometimes after making alloys, the degree of increased hardness is amazing. For example, adding 1 % of the copper alloy in copper, its hardness is 7 times larger than pure copper!
2. The melting point is low, and the melting point of many alloys is lower than the melting point of its ingredient metal. For example, aluminum silicon alloy (in addition to aluminum (aluminum also contains 4.0-13 % silicon, 0.2-1.5 % magnesium, 0.5-8 % copper, and 0.1-0.9 % manganese), the melting point is lower than the melting point of each ingredient metal. Another example is that the melting point of the tin is 231.9 ° C, the melting point of the lead is 327.5 ° C, and the melting point of the tin and lead is 180 ° C according to the alloy melting point of 2: 1, which is lower than the melting point of tin or lead. This alloy is commonly used welded. Another example is the "Wood alloy" for the fuse material. It is a alloy composed of tin, cadres, cadmium, and lead by 1: 4: 1: 2. The melting point is only 67 ° C, which is lower than the boiling point of water. Therefore, when the current on the circuit is too large and the wires are hot to about 70 ° C, the fuse can be melted and automatically cut off the circuit to ensure the safety of electricity consumption. It is also a high -pressure cooker easy melting piece, which is also a low -melting point alloy. When the pressure valve of the high -pressure cooker is blocked, the pressure in the pot increases, and the temperature rises to the melting point of the melting piece, it is easy to melt the melting channel to open, so the inside of the pot is reduced and cooled to ensure the safety of use. However, the melting point of the metal metal that forms the above low -melting point alloys is above two or three Baidu.
The physical and chemical properties of alloys are better than metal single quality, and their use is more widely used.
low alloy 16MN steel pipe knowledge

Q345 seamless steel pipe is a steel pipeline Material. Q represents the yield of this material. The latter 345 refers to the yield value of this material, around 345. It will reduce the yield value as the thickness of the material increases. Similar to the naming method of Q235.
Q345 Seamless steel pipes are made of steel pipes. Q represents the yield of this material. The latter 345 refers to the yield value of this material, around 345. It will reduce the yield value as the thickness of the material increases.