Hastelloy G3 Hastelloy
Hastelloy G3
Quantity:
Hastelloy G3
Data grade: Hastelloy G3 Hastelloy
1. Overview of Hastelloy G3 Hastelloy:
Hastelloy G3 Hastelloy is a nickel-based high-temperature alloy composed of nickel, chromium, molybdenum, cobalt and other elements, with a nickel content of about 44%. Hastelloy G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. It belongs to the Ni-Cr-Fe system containing Mo and Cu. It has excellent anti-oxidation and atmospheric corrosion and stress corrosion cracking capabilities, and has relatively good High resistance to local corrosion (pit corrosion, crevice corrosion). Because the alloy contains high Fe, it has the characteristics of low cost compared to other nickel-based corrosion-resistant alloys. G3 alloy is often used in flue gas desulfurization systems, papermaking, phosphoric acid production steam generators and heat exchangers. The oil well pipe made of this alloy has excellent anti-H2S, CO2, and Cl-corrosion performance, and is the best choice for oil well pipes in acid gas fields.
2. Chemical composition of Hastelloy G3 Hastelloy: %
Data grade: Hastelloy G3 Hastelloy
1. Overview of Hastelloy G3 Hastelloy:
Hastelloy G3 Hastelloy is a nickel-based high-temperature alloy composed of nickel, chromium, molybdenum, cobalt and other elements, with a nickel content of about 44%. Hastelloy G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. It belongs to the Ni-Cr-Fe system containing Mo and Cu. It has excellent anti-oxidation and atmospheric corrosion and stress corrosion cracking capabilities, and has relatively good High resistance to local corrosion (pit corrosion, crevice corrosion). Because the alloy contains high Fe, it has the characteristics of low cost compared to other nickel-based corrosion-resistant alloys. G3 alloy is often used in flue gas desulfurization systems, papermaking, phosphoric acid production steam generators and heat exchangers. The oil well pipe made of this alloy has excellent anti-H2S, CO2, and Cl-corrosion performance, and is the best choice for oil well pipes in acid gas fields.
2. Chemical composition of Hastelloy G3 Hastelloy: %
| C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | CR ≥ | Ni≥ | Mo ≥ | CU ≤ |
| 0.015 | 0.40 | 0.80 | 0.035 | 0.030 | 21.0-23.0 | 44.0 | 6.0-8.0 | 1.50-2.50 |
| other | N≤ | Al≤ | TI ≤ | FE ≤ | CO ≤ | V ≤ | W ≤ | Nb ≤ |
| - | - | - | 18.0-21.0 | 5.00 | - | 1.50 | - |
3. Hastelloy G3 Hastelloy alloy production process:
Hastelloy G3 alloy pipe production technology: 1. Hot rolling molding, 2. Hot extrusion molding. G3 alloy has poor high temperature plasticity, narrow thermoforming temperature range, and large deformation resistance. When it is around 1150℃ to 1220℃, the alloy has the best thermoplasticity. In the production of this G-3 alloy pipe, it mainly uses the hot extrusion process to mold. Thermal deformation of the blank in the extrusion cylinder is a key technology in hot extrusion molding and is also a bottleneck in the production of G-3 alloy pipes.
4. The development history and main characteristics of Hastelloy G3 Hastelloy:
Hastelloy G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. Among the cold-worked reinforced nickel-based corrosion-resistant alloys, Hastelloy G3 alloy has better corrosion resistance than alloys 825 and 028. Hastelloy G3 alloy has a temperature of 220℃, pH=3.3, and a Cl ion concentration of 15.175%. H2S and CO: In a corrosion environment with a partial pressure of 2.1 MPa, it still shows good corrosion resistance.
In addition, the effect of G-3 alloy grain size on its resistance to stress corrosion cracking and intergranular corrosion in a Gulf of Mexico analog acidic solution (25%NaC! +1.03 MPaH2S +1.03 MPa C02, temperature 218°C). The results of the slow strain rate corrosion test show that the cross-sectional shrinkage and elongation of G-3 alloy are both greater than 92%, and there are no secondary cracks. G-3 alloy shows good stress corrosion cracking resistance. When the grain size changes from level 6-7.5 to level 4-5.5, the impact on its stress corrosion cracking resistance is very small. Intergranular corrosion tests show that the corrosion rate of G-3 alloy is about 0.27~0.36 mm/a, which is significantly lower than the maximum allowable corrosion rate in chemical process (0.61 mm/a), and the influence of grain size on intergranular corrosion is also very small. Thompson et al. used the loop potential scanning method to study the pitting behavior of G-3 alloy in an acidic solution with a C1 ion concentration of 100 g/L and a temperature of 50°C. The results show that the pitting potential of G-3 alloy is 0.59 V. When the potential exceeds this value, the corrosion current increases rapidly and the corrosion resistance is greatly reduced.
5. Application fields of Hastelloy G3 Hastelloy:
G series nickel-based alloys (G3, G30, G35) are mainly used in petrochemical industries such as oil well pipes, evaporators used in wet phosphoric acid production, nuclear fuel regeneration equipment in the nuclear industry, and steel plant pickling equipment. C series alloys (C276, C22, C4) are one of the most used corrosion-resistant alloys, and have good corrosion resistance in oxidation or reduction environments. This is widely used in various places with complex corrosion environments, such as the nuclear industry, pharmaceutical industry, etc. 690 alloy is a very important nuclear data, an irreplaceable data of nuclear power generation steam pipes in nuclear power plants. It is a core component and has a good resistance to stress corrosion and cracking.
When drilling and mining petroleum and gas, in addition to drilling machinery and equipment, special pipe materials are also required, namely drilling strings, casings, oil pipes, etc., collectively known as"oil well pipes". Among the total steel used in the oil and gas industry, oil well pipes account for about 40%, which is an important part of oil and gas mining. According to the particularity of China's oil and gas mining environment, experts believe that ultra-high strength oil casing, high-extrusion casing, acid-resistant environmental corrosion-resistant oil pipes and special threaded oil well pipes are the high-performance oil well pipes that China urgently needs today and in the future.
For a long time, China's oil well pipe material selection mainly includes 13Cr, 22Cr, 25Cr, 316 stainless steel, etc. These stainless steels have high strength and contain a high Cr content. It is easy to form a dense cr2o3 passivation film on the surface of the alloy, which can effectively resist CO and corrosion. With the addition of Cr content, it is resistant to CO2 corrosion. The ability to gradually increase oil. However, with the gradual discovery and exploitation of highly acidic oil and gas fields buried deep, the content of H2S, CO2, S, and C1 in the mining environment is very high, and the commonly used stainless steel pipes can no longer meet the mining needs. In this way, highly alloyed nickel-based corrosion-resistant alloys (600, 825, G-3, 2550, 050, 625, C276) are gradually applied in oil well pipes. G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. It belongs to the Ni-Cr-Fe system containing Mo and Cu, and it has excellent anti-oxidation, atmospheric corrosion and stress corrosion cracking capabilities. Because the alloy contains high Fe, it has the characteristics of low cost compared to other nickel-based corrosion-resistant alloys. The oil well pipe made of this alloy has excellent corrosion resistance of H2S, CO2 and Cl, and is the best choice for oil well pipes in acid gas fields. With the gradual development of acidic oil and gas fields, the demand for nickel-based alloy oil well pipes continues to rise. Related products have been made by a few foreign manufacturers that have not yet fully mastered the manufacturing technology of nickel-based corrosion-resistant alloy pipes, which seriously threatens the country's energy security. In this way, domestic nickel-based alloy pipes are imperative.
Alloy G3 is an improved type of alloy G. This alloy also has excellent corrosion resistance, but it has stronger corrosion resistance and good welding properties. The lower carbon content of the alloy can delay the precipitation kinetic behavior of carbides. Its slightly higher aluminum content provides excellent resistance to local corrosion. G3 alloy has replaced G alloy in almost all industrial applications. At the same time, 825 alloy is also replaced in many applications that require resistance to local corrosion. Commonly used underground oil pipe materials are 825, G3, G50, C276 and 028 alloys. According to the fluid properties of highly acidic gas fields in Sichuan and Chongqing, the material must meet the following three requirements: high temperature resistance, high pressure resistance, and strong corrosion resistance.
6. Hastelloy G3 Hastelloy alloy varieties and supply status:
Shanghai Disheng Special Alloy can produce Hastelloy G3 seamless pipes, Hastelloy G3 welded pipes, Hastelloy G3 plates, Hastelloy G3 bars, Hastelloy G3 forgings, Hastelloy G3 rings, Hastelloy G3 silk and supporting welding materials of various specifications.
Hastelloy G3 alloy pipe production technology: 1. Hot rolling molding, 2. Hot extrusion molding. G3 alloy has poor high temperature plasticity, narrow thermoforming temperature range, and large deformation resistance. When it is around 1150℃ to 1220℃, the alloy has the best thermoplasticity. In the production of this G-3 alloy pipe, it mainly uses the hot extrusion process to mold. Thermal deformation of the blank in the extrusion cylinder is a key technology in hot extrusion molding and is also a bottleneck in the production of G-3 alloy pipes.
4. The development history and main characteristics of Hastelloy G3 Hastelloy:
Hastelloy G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. Among the cold-worked reinforced nickel-based corrosion-resistant alloys, Hastelloy G3 alloy has better corrosion resistance than alloys 825 and 028. Hastelloy G3 alloy has a temperature of 220℃, pH=3.3, and a Cl ion concentration of 15.175%. H2S and CO: In a corrosion environment with a partial pressure of 2.1 MPa, it still shows good corrosion resistance.
In addition, the effect of G-3 alloy grain size on its resistance to stress corrosion cracking and intergranular corrosion in a Gulf of Mexico analog acidic solution (25%NaC! +1.03 MPaH2S +1.03 MPa C02, temperature 218°C). The results of the slow strain rate corrosion test show that the cross-sectional shrinkage and elongation of G-3 alloy are both greater than 92%, and there are no secondary cracks. G-3 alloy shows good stress corrosion cracking resistance. When the grain size changes from level 6-7.5 to level 4-5.5, the impact on its stress corrosion cracking resistance is very small. Intergranular corrosion tests show that the corrosion rate of G-3 alloy is about 0.27~0.36 mm/a, which is significantly lower than the maximum allowable corrosion rate in chemical process (0.61 mm/a), and the influence of grain size on intergranular corrosion is also very small. Thompson et al. used the loop potential scanning method to study the pitting behavior of G-3 alloy in an acidic solution with a C1 ion concentration of 100 g/L and a temperature of 50°C. The results show that the pitting potential of G-3 alloy is 0.59 V. When the potential exceeds this value, the corrosion current increases rapidly and the corrosion resistance is greatly reduced.
5. Application fields of Hastelloy G3 Hastelloy:
G series nickel-based alloys (G3, G30, G35) are mainly used in petrochemical industries such as oil well pipes, evaporators used in wet phosphoric acid production, nuclear fuel regeneration equipment in the nuclear industry, and steel plant pickling equipment. C series alloys (C276, C22, C4) are one of the most used corrosion-resistant alloys, and have good corrosion resistance in oxidation or reduction environments. This is widely used in various places with complex corrosion environments, such as the nuclear industry, pharmaceutical industry, etc. 690 alloy is a very important nuclear data, an irreplaceable data of nuclear power generation steam pipes in nuclear power plants. It is a core component and has a good resistance to stress corrosion and cracking.
When drilling and mining petroleum and gas, in addition to drilling machinery and equipment, special pipe materials are also required, namely drilling strings, casings, oil pipes, etc., collectively known as"oil well pipes". Among the total steel used in the oil and gas industry, oil well pipes account for about 40%, which is an important part of oil and gas mining. According to the particularity of China's oil and gas mining environment, experts believe that ultra-high strength oil casing, high-extrusion casing, acid-resistant environmental corrosion-resistant oil pipes and special threaded oil well pipes are the high-performance oil well pipes that China urgently needs today and in the future.
For a long time, China's oil well pipe material selection mainly includes 13Cr, 22Cr, 25Cr, 316 stainless steel, etc. These stainless steels have high strength and contain a high Cr content. It is easy to form a dense cr2o3 passivation film on the surface of the alloy, which can effectively resist CO and corrosion. With the addition of Cr content, it is resistant to CO2 corrosion. The ability to gradually increase oil. However, with the gradual discovery and exploitation of highly acidic oil and gas fields buried deep, the content of H2S, CO2, S, and C1 in the mining environment is very high, and the commonly used stainless steel pipes can no longer meet the mining needs. In this way, highly alloyed nickel-based corrosion-resistant alloys (600, 825, G-3, 2550, 050, 625, C276) are gradually applied in oil well pipes. G3 alloy is a nickel-based corrosion-resistant alloy with superior performance. It belongs to the Ni-Cr-Fe system containing Mo and Cu, and it has excellent anti-oxidation, atmospheric corrosion and stress corrosion cracking capabilities. Because the alloy contains high Fe, it has the characteristics of low cost compared to other nickel-based corrosion-resistant alloys. The oil well pipe made of this alloy has excellent corrosion resistance of H2S, CO2 and Cl, and is the best choice for oil well pipes in acid gas fields. With the gradual development of acidic oil and gas fields, the demand for nickel-based alloy oil well pipes continues to rise. Related products have been made by a few foreign manufacturers that have not yet fully mastered the manufacturing technology of nickel-based corrosion-resistant alloy pipes, which seriously threatens the country's energy security. In this way, domestic nickel-based alloy pipes are imperative.
Alloy G3 is an improved type of alloy G. This alloy also has excellent corrosion resistance, but it has stronger corrosion resistance and good welding properties. The lower carbon content of the alloy can delay the precipitation kinetic behavior of carbides. Its slightly higher aluminum content provides excellent resistance to local corrosion. G3 alloy has replaced G alloy in almost all industrial applications. At the same time, 825 alloy is also replaced in many applications that require resistance to local corrosion. Commonly used underground oil pipe materials are 825, G3, G50, C276 and 028 alloys. According to the fluid properties of highly acidic gas fields in Sichuan and Chongqing, the material must meet the following three requirements: high temperature resistance, high pressure resistance, and strong corrosion resistance.
6. Hastelloy G3 Hastelloy alloy varieties and supply status:
Shanghai Disheng Special Alloy can produce Hastelloy G3 seamless pipes, Hastelloy G3 welded pipes, Hastelloy G3 plates, Hastelloy G3 bars, Hastelloy G3 forgings, Hastelloy G3 rings, Hastelloy G3 silk and supporting welding materials of various specifications.
| Variety classification | Delivery status | |||||||
| Seamless tube | Soluble+acid white, the length can be fixed | |||||||
| Plate | Soluble, pickled, cut edges | |||||||
| Welding pipe | Solid -soluble acid white+RT%probe | |||||||
| Forged | Antuction+car light | |||||||
| Macaron | Forging rolling state, surface polishing or car light | |||||||
| Band material | Cold rolling, solid -soluble soft state, de -oxide leather delivery | |||||||
| Silk material | Solid -soluble acid dishwashing or straight strip -shaped, solid -soluble straight strip fine polishing state delivery | |||||||
