GB 5310 15CrMoG high pressure seamless boiler tubes

GB 5310 15CrMoG high pressure seamless boiler tubes are designed and manufactured to meet the technical requirements of high-pressure boilers in various industrial settings.

GB 5310 15CrMoG high pressure seamless boiler tubes

GB 5310 15CrMoG high pressure seamless boiler tubes are a type of seamless steel tubes or pipes designed and manufactured according to the Chinese national standard GB/T 5310.

15CrMoG is a type of pearlitic steel with high creep resistance and excellent mechanical properties at high temperatures. It is commonly used as the material for high-temperature boilers in power plants which require ultra-supercritical steam parameters.

The high-pressure seamless production process ensures the tubes have tight dimensional tolerance and excellent surface finish. The tubes can come in various lengths, outer diameters, wall thicknesses, and end types such as plain end, beveled end, or threaded ends.

GB 5310 15CrMoG high-pressure seamless boiler tubes are widely used in various industrial applications such as power generation, manufacturing, and petrochemicals, among others, as they aim to ensure the safety and reliability of high-pressure boilers by meeting strict standards for the production and use of seamless steel tubes and pipes.

15CrMoG High Pressure Seamless Boiler Tubes is GB 5310-95 steel grade (equivalent to 13CrMo44 of Federal Germany; corresponding to 1Cr-1 / 2Mo and 1 1 / 4cr-1 / 2mo-si steel widely used in various countries in the world)

15CrMoG is GB 5310-95 steel grade (equivalent to 13CrMo44 of Federal Germany; corresponding to 1Cr-1 / 2Mo and 1 1 / 4cr-1 / 2mo-si steel widely used in various countries in the world). Its chromium content is higher than 12CrMo steel, so it has higher thermal strength at 500-550 ℃. When the temperature is higher than 550 ℃, the thermal strength of 15CrMoG steel is significantly reduced. When it runs at 500-550ec for a long time, it does not produce graphitization, but it will produce carbide spheroidization and redistribution of alloy elements, which all lead to the decrease of the thermal strength of steel. 15CrMoG steel has good relaxation resistance at 450 ℃. Its pipe making and welding process performance is good.

15CrMoG alloy pipe is inspected by third party

15CrMoG alloy pipe
15CrMoG alloy pipe
15CrMoG alloy pipe
15CrMoG alloy pipe
15CrMoG alloy pipe
15CrMoG alloy pipe

15CrMoG alloy pipe for High Pressure Boiler description

Standard: GB 5310

Relative grades: 20G, 20MnG, 15MoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG. After consultation, can also supply other grades of steel.

15CrMoG Alloy steel pipe is a seamless steel tube, its performance is much higher than the general seamless steel pipe, because the inside of this tube contains CR more, its alloy steel tube high temperature, low-temperature, corrosion resistance of other seamless steel tubes, so the alloy tube in the petroleum, chemical, electric power, boiler and other industries are more widely used.

Mechanical properties of 15CrMoG

Grade Tensile strength(MPa) Yield strength(MPa) Elongation(%)
Vertical Longitudinal
15CrMoG 440-640 295 min. 21 min. 19 min.

Chemical composition of 15CrMoG alloy pipe

C Si Mn P S Cr Mo
0.12-0.18 0.17-0.37 0.40-0.70 0.025 max. 0.015 max. 0.80-1.10 0.40-0.55

15CrMoG alloy pipe heat treatment: Normalizing and tempering

PMI test for 15CrMoG alloy pipe

To perform a PMI test on a 15CrMoG alloy pipe, you typically use handheld or portable X-ray fluorescence (XRF) analyzers or optical emission spectrometers.

PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe
PMI test for 15CrMoG alloy pipe

The W.T. tolerance of 15CrMoG alloy pipe

W.T.(S) Tolerance of W.T.
<3.5  +15%(+0.48mm min)
 -10%(+0.32mm min)
3.5-20 +15%,-10%
>20 D<219 ±10%
D≥219 +12.5%,-10%

The principle of purifying hydrogen from 15CrMoG alloy pipe is that, at 300-500 ℃, hydrogen is adsorbed on the side of the 15CrMoG alloy steel tube, and the hydrogen is absorbed on the 1515CrMoG alloy steel pipe wall, because of the lack of two electrons in the 4d electron layer of palladium, It can produce unstable chemical bonds with hydrogen (this reaction of palladium and hydrogen is reversible), under the action of Palladium, hydrogen is ionized to proton its radius is 1.5x1015m, and the lattice constant of palladium is 3.88x10-10m (20 ℃), so it can pass 15CrMoG alloy steel pipe, Under the action of Palladium, protons are combined with electrons to form hydrogen molecules, escaping from the other side of the 15CrMoG alloy steel tube.

Application

For high-pressure boiler (working pressure 9.8MPa or more generally, the working temperature between 450℃-650℃) of heating surface tubes, header, economizer, superheater, reheater and so on.

Classification, code
a) Hot rolled steel pipe, codenamed WH;
b) Cold drawn steel pipe, codenamed WC.

Delivery status

The steel tubes shall be delivered in a heat treated condition.

Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; 12000mm; and so on.

Max length: 16000mm, also U bending can be offered.

Note:

This inventory is part of the inventory, demand and other models in stock or order materials, please contact us.

15CrMoG alloy pipe

Related GB 5310 15CrMoG high pressure seamless boiler tubes

GB 5310 is a standard for seamless tubes used in high-pressure steam boilers and pipelines. The main application for GB 5310 tubes is as high-pressure pipeline tubes in boiler projects. These tubes can be used for superheaters, reheaters, and windpipes.

The GB 5310 standard applies to tubes made from materials such as:

The long-term use temperature for GB 5310 20G seamless steel pipes used as headers and steam pipes is ≤ 425 ° C.

Chemical Compositions(%) of GB 5310

Steel Grade C Si Mn S P Cr Mo V Ti B W Ni Al Nb N
20G 0.17-0.23 0.17-0.37 0.35-0.65 0.015 0.025                    
20 MnG 0.17-0.24 0.17-0.37 0.70-1.00 0.015 0.025                    
25MnG 0.22-0.27 0.17-0.37 0.70-1.00 0.015 0.025                    
15MoG 0.12-0.20 0.17-0.37 0.40-0.80 0.015 0.025   0.25-0.35                
20MnG 0.15-0.25 0.17-0.37 0.40-0.80 0.015 0.025   0.44-0.65                
12CrMoG 0.08-0.15 0.17-0.37 0.40-0.70 0.015 0.025 0.40-0.70 0.40-0.55                
15CrMoG 0.12-0.18 0.17-0.37 0.40-0.70 0.015 0.025 0.80-1.10 0.40-0.55                
12Cr2MoG 0.08-0.15 ≤0.60 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                
12Cr1MoVG 0.08-0.15 0.17-0.37 0.40-0.70 0.010 0.025 0.90-1.20 0.25-0.35 0.15-0.30              
12Cr2MoWVTiB 0.08-0.15 0.45-0.75 0.45-0.65 0.015 0.025 1.60-2.10 0.50-0.65 0.28-0.42 0.08-0.18 0.002-0.008 0.30-0.55        
10Cr9Mo1VNbN 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.040 ≤0.040 0.06-0.10 0.03-0.07

Manufacturing methods

Steel smelting method
High-quality carbon structural steel and alloy structural steel shall be smelted by electric furnace plus furnace refining, oxygen converter plus furnace refining or electroslag remelting method, and steel refined outside the furnace shall be subjected to vacuum degassing treatment.

10Cr9Mo1VNbN, 10Cr9MoW2VNbBN, 10Cr11MoW2VNbCu1BN, 11Cr9Mo1W1VNbBN and stainless (heat-resistant) steel should be smelted by electric furnace plus furnace refining or electroslag remelting. The steel refined outside the furnace should be vacuum degassed.

After consultation between the supplier and the buyer, and indicating in the contract, other higher-required smelting methods may be adopted. When the purchaser specifies a certain smelting method, it should be indicated in the contract.

Manufacturing methods and requirements for tube blanks
The tube blank can be produced by continuous casting, die casting or hot rolling (forging).
Continuous casting tube blanks shall comply with the provisions of YB/T 4149, in which the level of low-fold structural defects shall not exceed 1; the hot-rolled (forged) tube blanks shall comply with the provisions of YB/T ××××; It is carried out in accordance with the regulations for hot-rolled (forged) tube blanks.

Manufacturing method of steel pipe
Steel pipes shall be manufactured by hot rolling (extrusion, expansion) or cold drawing (rolling). Steel pipes of grade 08Cr18Ni11NbFG shall be manufactured by cold drawing (rolling) seamless method.

Delivery status

The steel pipe shall be delivered in a heat treated condition. The heat treatment system for steel pipes shall comply with the requirements of Table 4. The heat treatment system for steel pipes should be filled in the quality certificate.

Heat treatment system for steel pipes

 No. Steel Pipe Heat treatment
1 12Ga、20Ga 880 ℃~940 ℃,Normalizing
2 20MnGa、25MnGa 880 ℃~940 ℃,Normalizing
3 15MoGa、20MoGa 890 ℃~950 ℃,Normalizing
4 12CrMoGa 900 ℃~960 ℃,Normalizing;650 ℃~730 ℃,Tempering
5 15CrMoGa 900 ℃~960 ℃,Normalizing;660 ℃~730 ℃,Tempering
6 12Cr2MoGa 900 ℃~960 ℃,Normalizing;700 ℃~750 ℃,Tempering
It can also be heated to 900 °C ~ 960 °C, and the furnace is cooled to 700 °C for more than 1 h, and air-cooled.
7 12Cr1MoVGa 980 ℃~1 020 ℃,Normalizing,980 °C ~ 1 020 °C normalizing, when the wall thickness is greater than 30 mm, forced cooling; 720 °C ~ 760 °C tempering.
8 12Cr2MoWVTiB 1 000 ℃~1 035 ℃,Normalizing;760 ℃~790 ℃,Tempering
9 07Cr2MoW2VNbB ≥1 040 ℃,Normalizing,≥730 ℃,Tempering
10 08Cr2Mo1W2VTiB ≥980 ℃,Normalizing,≥730 ℃,Tempering
11 12Cr3MoVSiTiB 1 040 ℃~1 060 ℃,Normalizing;720 ℃~770 ℃,Tempering
12 09Ni1MnMoNbCu 880 ℃~980 ℃,Normalizing,580 ℃~680 ℃,Tempering
13 10Cr9Mo1VNbN ≥1 040 ℃,Normalizing,≥730 ℃,Tempering
14 10Cr9MoW2VNbBN ≥1 040 ℃,Normalizing,≥730 ℃,Tempering
15 10Cr11MoW2VNbCu1BN ≥1 040 ℃,Normalizing,≥730 ℃,Tempering
16 11Cr9Mo1W1VNbBN 1 040 ℃~1 080 ℃,Normalizing,740 ℃~780 ℃,Tempering
17 15Cr18Ni9b Solution treatment: solution temperature ≥1 040 °C.
18 10Cr18Ni9NbCu3BNb Solution treatment: solution temperature ≥ 1 100 °C.
19 07Cr25Ni21NbNcd Separate solution treatment: solution temperature ≥ 1 100 °C.
20 08Cr18Ni11Nbbd Solution treatment: solution temperature ≥1 040 °C.
21 07Cr18Ni11Nbcd Separate solution treatment: hot rolling (extrusion, expansion) steel tube solid solution temperature ≥ 1 050 °C, cold drawn (rolled) steel tube solid solution temperature ≥ 1100 °C.
22 08Cr18Ni10NbFG Softening heat treatment before cold working: softening heat treatment temperature should be at least 50 °C higher than solution heat treatment temperature; solution treatment after final cold working: solution temperature ≥1 180 °C
a. The finishing temperature of the hot-rolled steel pipe is at the critical temperature of the phase transition Ar3 to the upper limit of the temperature specified in the table, and when the steel pipe is air-cooled, the steel pipe is considered to be normalized.

b. The finishing temperature of the hot-rolled steel pipe meets the solid solution temperature specified in the table. As an alternative to the solid solution treatment method, the steel pipe can be separately quenched by water or cooled by other fast enough methods.

c, the solution treatment should be a separate heat treatment, and the heat treatment in the process is not allowed to replace the separate solution treatment.

d. According to the requirements of the purchaser, the steel pipes of the grades 07Cr25Ni21NbN, 08Cr19Ni10Nb and 07Cr18Ni11Nb may be subjected to a stabilization heat treatment lower than the initial solution treatment temperature after the solution treatment, and the temperature of the stabilization heat treatment is negotiated between the supplier and the purchaser.

Mechanical Properties of GB5310

Grade Tensile strength
(Mpa)
Yield point(Mpa)
not less than
Elongation(%)
not less than
Impact(J)
not less than
20G 410-550 245 24/22 40/27
25MnG 485-640 275 20/18 40/27
15MoG 450-600 270 22/20 40/27
20MnG 415-665 220 22/20 40/27
12CrMoG 410-560 205 21/19 40/27
12Cr2MoG 450-600 280 22/20 40/27
12Cr1MoVG 470-640 255 21/19 40/27
12Cr2MoWVTiB 540-735 345 18 40/27
10Cr9Mo1VNb ≥585 415 20 40
1Cr18Ni9 ≥520 206 35  
1Cr19Ni11Nb ≥520 206 35  

Additional Condition

GB 5310 High pressure boiler tube Application

Boiler tubing is used in these industries:

Seamless tube processing

With years of expertise, we provide a diverse array of steel tube processing options. From sawing and machining tube blanks to intricate bending and upsetting operations, we actively assist you throughout your projects.

Our capabilities extend to eccentricity reduction and concentricity enhancement through turning and grinding. We excel in creating complex geometries using processes like rotary swaging and axial forming. Additionally, we offer property modifications via partial heat treatment, ensuring tailored solutions for your specific needs.

Variable wall thicknesses

Variable wall thicknesses

Drilling / stamping / lasering

Drilling / stamping / lasering

Peeling / roller burnishing

Peeling / roller burnishing

Cold forming

Cold forming

Cutting

Cutting

Beveling

Beveling

Deburring

Deburring

Thread rolling / threading

Thread rolling / threading

Partial hardening

Partial hardening

Turning / milling / grinding

Turning / milling / grinding

Reducing / expanding

Reducing / expanding

Machining

Machining

application

Application

Alloy steel pipes are ideally suitable for chemical, petrochemicals, and other energy-related applications.

The alloy steel pipe adopts high quality carbon steel, alloy structural steel and stainless & heat resisting steel as raw material through hot rolling or cold drawn to be made.

Alloy steel can be used in process area where carbon steel has limitation such as

As an important element of steel products, alloy steel pipe can be divided into seamless steel pipe and welded steel pipe according to the manufacturing technique and tube billet shape.

Here you can see the common alloy steel grade that you will come across.

Why the application of alloy steel pipe is wider than others

There are many kinds of materials used for transport in industrial production. Specifically we will have more choices and it is not limited to the use of alloy steel pipe. But even in the face of more choices, many people tend to choose alloy steel pipe. People make their own choices will have their own reasons. This means the alloy steel pipe application has its own advantages. Compared with transmission lines made of other materials, after it meets the basic application requirements, its quantity is lighter. Then in the practical application of alloy steel pipe, it will have more advantages because of this. Besides its physical characteristic advantage, it also has economic advantages. The wide application of alloy steel pipe is with kinds of reasons. So in practical usage, we can exploit the advantages to the full, in this way can we get more profits in these applications of alloy steel pipe.

What requirements should alloy steel pipe application meet

The transportation of kinds of gases or liquids in production needs to rely on alloy steel pipe. This shows that the actual role of alloy steel pipe application is important. High temperature resistant and low temperature resistant is the tolerance of temperature. In the practical application of alloy steel pipe, there will be many materials need to be transported. However their temperatures are not the same. So this can be the basic requirement to alloy steel pipe. It needs more corrosion resistance. Corrosion resistant material is the best material during transporting, because it is corrosion resistant. So it can be used in more occasions. And it is definitely very convenient for users.

The biggest advantages of alloy steel pipe

Can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy steel pipe total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy steel pipe to provide a wider space for the development of the industry. The future needs of the average annual growth of China’s high-pressure alloy steel pipe long products up to 10-12%.

Specification, standard and identification of alloy steel pipes

Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous.

Industries We Serve

Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.

The biggest advantages of alloy steel pipe can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy tube total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy tube to provide a wider space for the development of the industry. According to the Chinese Special Steel Association alloy pipe Branch Expert Group, the future needs of the average annual growth of China’s high-pressure alloy pipe long products up to 10-12%.

Q&A

Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.

The most important and desired changes in alloy steel are

Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change.

Alloying Elements & Their Effects

Pipes, Tubes and Hollow Sections

Norms

Grade

Alloying Elements

Commonly used alloying elements and their effects are listed in the table given below.

Alloying Elements Effect on the Properties
Chromium Increases Resistance to corrosion   and oxidation. Increases hardenability and wear resistance. Increases high   temperature strength.
Nickel Increases hardenability. Improves   toughness. Increases impact strength at low temperatures.
Molybdenum Increases hardenability, high   temperature hardness, and wear resistance. Enhances the effects of other   alloying elements. Eliminate temper brittleness in steels. Increases high   temperature strength.
Manganese Increases hardenability. Combines   with sulfur to reduce its adverse effects.
Vanadium Increases hardenability, high   temperature hardness, and wear resistance. Improves fatigue resistance.
Titanium Strongest carbide former. Added to   stainless steel to prevent precipitation of chromium carbide.
Silicon Removes oxygen in steel making.   Improves toughness. Increases hardness ability
Boron Increases hardenability. Produces   fine grain size.
Aluminum Forms nitride in nitriding steels.   Produces fine grain size in casting. Removes oxygen in steel melting.
Cobalt Increases heat and wear   resistance.
Tungsten Increases hardness at elevated   temperatures. Refines grain size.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes
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