Hastelloy B3
Hastelloy B3
Quantity:
Hastelloy B3
Information grade: Hastelloy B3
US grade: UNS N10675
Information grade: Hastelloy B3
US grade: UNS N10675
1. Overview of Hastelloy B3 (N10675) Hastelloy:
Hastelloy B3 (N10675) is a nickel-based high-temperature alloy composed of nickel, molybdenum, cobalt and other elements, with a nickel content of approximately 65%. Hastelloy B3 (N10675) nickel-based alloy material is a new material improved on the basis of Hastelloy B2. It improves the thermal stability of the material, thereby improving the corrosion resistance. At the same time, it improves the hot forming and cold forming performance. In recent years, it has been increasingly used in the production and manufacturing of chemical equipment.
2. Chemical composition of Hastelloy B3 (N10675) Hastelloy: %
Hastelloy B3 (N10675) is a nickel-based high-temperature alloy composed of nickel, molybdenum, cobalt and other elements, with a nickel content of approximately 65%. Hastelloy B3 (N10675) nickel-based alloy material is a new material improved on the basis of Hastelloy B2. It improves the thermal stability of the material, thereby improving the corrosion resistance. At the same time, it improves the hot forming and cold forming performance. In recent years, it has been increasingly used in the production and manufacturing of chemical equipment.
2. Chemical composition of Hastelloy B3 (N10675) Hastelloy: %
| C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Mo≥ | Cu≤ |
| 0.01 | 0.10 | 3.00 | 0.030 | 0.010 | 1.00-3.00 | 65.0 | 27.0-32.0 | 0.20 |
| Nb/Ta≤ | Al≤ | Ti≤ | Fe≤ | Co≤ | V≤ | W≤ | Ni+Mo | Nb≤ |
| 0.20 | 0.50 | 0.20 | 1.00-3.00 | 3.00 | 0.20 | 3.00 | 94.0-98.0 | 0.20 |
3. Main characteristics, welding and processing of Hastelloy B3 (N10675) Hastelloy:
1. Data analysis: Mechanical properties of Hastelloy B3 (N10675) Hastelloy plate in solid solution state:
1. Data analysis: Mechanical properties of Hastelloy B3 (N10675) Hastelloy plate in solid solution state:
As the heating temperature increases, its tensile strength, yield strength, and elastic modulus will decrease, while the elongation, thermal expansion coefficient, thermal conductivity, and specific heat will increase slightly; with the increase in cold deformation rate, its hardness, resistance The tensile strength and yield strength are increased, and the elongation is reduced.
2. Forming processing characteristics: After analysis, the main forming processing characteristics of Hastelloy B3 are:
(1) The elongation of Hastelloy B3 material is relatively high, which creates favorable conditions for cold forming.
(2) Hastelloy B3 material is harder than austenitic stainless steel and has a more obvious work hardening tendency, so greater pressure is required during cold forming, or step-by-step forming.
(3) When the cold forming deformation rate of Hastelloy B3 material is less than 10%, it will not affect the corrosion resistance of the workpiece. However, during the welding process, the presence of residual stress may cause hot cracks in the weld. Therefore, for workpieces that need to be welded later, the influence of residual stress should be eliminated as much as possible.
(4) Cold forming with severe deformation will increase the yield ratio of Hastelloy B3 material and increase the susceptibility to stress corrosion and cracks. Intermediate and final heat treatment processes are often used.
(5) Hastelloy B3 material is very sensitive to oxidizing media and sulfur, phosphorus, lead and other low melting point gold at high temperatures.
(6) In the 600~800°C range, if the heating time is too long, Hastelloy B3 alloy will produce a brittle phase, resulting in reduced elongation. Moreover, when external force or deformation is limited in this temperature range, hot cracks are prone to occur. Therefore, when using hot forming, the temperature must be controlled above 900℃.
(7) Before processing and pressing Hastelloy B3 material, the surface of the mold in contact with the workpiece should be cleaned; during cold working, lubrication method can be used, and it must be degreased or cleaned immediately after forming.
(8) After the workpiece comes out of the furnace and is water-cooled, the oxide film on the surface is thick and should be fully pickled. If there is an oxide film remaining, cracks may occur during the next pressing; if necessary, sandblasting can be performed before pickling.
3. Welding and forming:
(1) Before forming and processing, if the raw blank needs to be welded, it is best to choose gas tungsten arc welding (GTAW) welding method, so as to better protect the weld from oxidation. If manual arc welding is used, It is easy to cause the middle weld bead to be oxidized. Even if each layer is polished and cleaned, it is difficult to ensure that the cleaning is complete. There is a fine oxide layer remaining, which may also affect the forming and processing efficiency of the weld. Before welding the workpiece, attachments and oxide layers on the surface of the groove and the base metal must be removed, because the presence of oxide films and impurities will affect the performance of the weld and heat-affected zone. It is best to use a small current for welding, avoid too slow speed, no swing, control the interlayer temperature below 100°C, and use gas protection on the front and back sides to avoid high-temperature oxidation and burning of alloy elements. Before pressing, the weld surface should be polished smooth, the thick oxide layer on the weld surface should be removed and pickled. Because the oxidation cloud in the weld of Hastelloy B3 material is very hard and difficult to remove by direct pickling, it is easy to produce fine cracks during the press forming process, which will affect the performance of the weld.
(2) The advantage of hot forming is that it can be formed at one time and work hardening can be avoided. If the forming temperature can be controlled well, heat treatment can be eliminated. However, the temperature changes greatly during the hot forming process, and each area is different. Even the surface in direct contact with the mold may be much lower than the temperature inside the metal, which is difficult to measure and control. Once local data enters during the processing Defects such as microcracks occur in sensitive temperature areas, which are difficult to eliminate in the later solid solution heat treatment. Drawing on the experience of the processing plant, the cold forming process was chosen. The pressing method is preferably molding. When spinning is necessary, cold spinning or warm spinning with a temperature not exceeding 400°C is used.
(3) During the cold forming process, when the deformation rate is large, the step-by-step forming process should be used. Intermediate heat treatment is required for step-by-step forming. Solution heat treatment should be used and the temperature should be controlled above 1000°C. Choose the solution heat treatment process and the temperature reaches 1060~1080℃. After the workpiece is finally pressed and formed, it must undergo a solid solution heat treatment to eliminate residual stress and avoid affecting the subsequent welding quality."
4. Heat treatment:
Hastelloy B3 (N10675) It is important to keep the workpiece clean and free of contamination at all times before and during heat treatment. During the heating process, the workpiece must not come into contact with sulfur, phosphorus, lead and other low melting point metals, otherwise it will damage the performance of the alloy and make the alloy brittle. The heating furnace is preferably an electric furnace. If a gas or oil furnace is used, the lower the sulfur content in the fuel, the better. According to the recommendation of the data manufacturer, the total sulfur content in gas and liquefied petroleum gas should not be greater than 0.1% (V). In urban areas The sulfur content in gas should not be greater than 0.25g/m3, and the sulfur content in fuel oil should be less than 0.5% (W) is better.
The furnace gas must be clean and slightly reducing. Fluctuations between oxidizing and reducing properties of the furnace gas should be avoided. The heating flame cannot directly contact the workpiece. The workpiece must be supported before entering the furnace to avoid adverse deformation at high temperatures. The workpiece should heat up as quickly as possible, and the workpiece must wait until the furnace temperature reaches the heat treatment temperature before it can be put into the furnace. After coming out of the oven, it should be cooled quickly with water, and should be immersed or sprayed evenly over the entire area. Water pipe pouring is strictly prohibited to prevent uneven cooling and heating, which may lead to abnormal deformation or tearing.
4. Hastelloy B3 (N10675) Hastelloy variety specifications and supply status:
Shanghai Disheng Special Alloy can produce various specifications of Hastelloy B3 seamless pipes, Hastelloy B3 steel plates, Hastelloy B3 round bars, Hastelloy B3 forgings, Hastelloy B3 flanges, Hastelloy B3 rings, Hastelloy B3 welded pipes, Hastelloy B3 steel strips, Hastelloy B3 wire and supporting welding materials.
2. Forming processing characteristics: After analysis, the main forming processing characteristics of Hastelloy B3 are:
(1) The elongation of Hastelloy B3 material is relatively high, which creates favorable conditions for cold forming.
(2) Hastelloy B3 material is harder than austenitic stainless steel and has a more obvious work hardening tendency, so greater pressure is required during cold forming, or step-by-step forming.
(3) When the cold forming deformation rate of Hastelloy B3 material is less than 10%, it will not affect the corrosion resistance of the workpiece. However, during the welding process, the presence of residual stress may cause hot cracks in the weld. Therefore, for workpieces that need to be welded later, the influence of residual stress should be eliminated as much as possible.
(4) Cold forming with severe deformation will increase the yield ratio of Hastelloy B3 material and increase the susceptibility to stress corrosion and cracks. Intermediate and final heat treatment processes are often used.
(5) Hastelloy B3 material is very sensitive to oxidizing media and sulfur, phosphorus, lead and other low melting point gold at high temperatures.
(6) In the 600~800°C range, if the heating time is too long, Hastelloy B3 alloy will produce a brittle phase, resulting in reduced elongation. Moreover, when external force or deformation is limited in this temperature range, hot cracks are prone to occur. Therefore, when using hot forming, the temperature must be controlled above 900℃.
(7) Before processing and pressing Hastelloy B3 material, the surface of the mold in contact with the workpiece should be cleaned; during cold working, lubrication method can be used, and it must be degreased or cleaned immediately after forming.
(8) After the workpiece comes out of the furnace and is water-cooled, the oxide film on the surface is thick and should be fully pickled. If there is an oxide film remaining, cracks may occur during the next pressing; if necessary, sandblasting can be performed before pickling.
3. Welding and forming:
(1) Before forming and processing, if the raw blank needs to be welded, it is best to choose gas tungsten arc welding (GTAW) welding method, so as to better protect the weld from oxidation. If manual arc welding is used, It is easy to cause the middle weld bead to be oxidized. Even if each layer is polished and cleaned, it is difficult to ensure that the cleaning is complete. There is a fine oxide layer remaining, which may also affect the forming and processing efficiency of the weld. Before welding the workpiece, attachments and oxide layers on the surface of the groove and the base metal must be removed, because the presence of oxide films and impurities will affect the performance of the weld and heat-affected zone. It is best to use a small current for welding, avoid too slow speed, no swing, control the interlayer temperature below 100°C, and use gas protection on the front and back sides to avoid high-temperature oxidation and burning of alloy elements. Before pressing, the weld surface should be polished smooth, the thick oxide layer on the weld surface should be removed and pickled. Because the oxidation cloud in the weld of Hastelloy B3 material is very hard and difficult to remove by direct pickling, it is easy to produce fine cracks during the press forming process, which will affect the performance of the weld.
(2) The advantage of hot forming is that it can be formed at one time and work hardening can be avoided. If the forming temperature can be controlled well, heat treatment can be eliminated. However, the temperature changes greatly during the hot forming process, and each area is different. Even the surface in direct contact with the mold may be much lower than the temperature inside the metal, which is difficult to measure and control. Once local data enters during the processing Defects such as microcracks occur in sensitive temperature areas, which are difficult to eliminate in the later solid solution heat treatment. Drawing on the experience of the processing plant, the cold forming process was chosen. The pressing method is preferably molding. When spinning is necessary, cold spinning or warm spinning with a temperature not exceeding 400°C is used.
(3) During the cold forming process, when the deformation rate is large, the step-by-step forming process should be used. Intermediate heat treatment is required for step-by-step forming. Solution heat treatment should be used and the temperature should be controlled above 1000°C. Choose the solution heat treatment process and the temperature reaches 1060~1080℃. After the workpiece is finally pressed and formed, it must undergo a solid solution heat treatment to eliminate residual stress and avoid affecting the subsequent welding quality."
4. Heat treatment:
Hastelloy B3 (N10675) It is important to keep the workpiece clean and free of contamination at all times before and during heat treatment. During the heating process, the workpiece must not come into contact with sulfur, phosphorus, lead and other low melting point metals, otherwise it will damage the performance of the alloy and make the alloy brittle. The heating furnace is preferably an electric furnace. If a gas or oil furnace is used, the lower the sulfur content in the fuel, the better. According to the recommendation of the data manufacturer, the total sulfur content in gas and liquefied petroleum gas should not be greater than 0.1% (V). In urban areas The sulfur content in gas should not be greater than 0.25g/m3, and the sulfur content in fuel oil should be less than 0.5% (W) is better.
The furnace gas must be clean and slightly reducing. Fluctuations between oxidizing and reducing properties of the furnace gas should be avoided. The heating flame cannot directly contact the workpiece. The workpiece must be supported before entering the furnace to avoid adverse deformation at high temperatures. The workpiece should heat up as quickly as possible, and the workpiece must wait until the furnace temperature reaches the heat treatment temperature before it can be put into the furnace. After coming out of the oven, it should be cooled quickly with water, and should be immersed or sprayed evenly over the entire area. Water pipe pouring is strictly prohibited to prevent uneven cooling and heating, which may lead to abnormal deformation or tearing.
4. Hastelloy B3 (N10675) Hastelloy variety specifications and supply status:
Shanghai Disheng Special Alloy can produce various specifications of Hastelloy B3 seamless pipes, Hastelloy B3 steel plates, Hastelloy B3 round bars, Hastelloy B3 forgings, Hastelloy B3 flanges, Hastelloy B3 rings, Hastelloy B3 welded pipes, Hastelloy B3 steel strips, Hastelloy B3 wire and supporting welding materials.
| Variety classification | delivery status | |||||||
| Seamless tube | Solid solution + acid white, length can be customized | |||||||
| plate | Solid solution, pickling, trimming | |||||||
| welded pipe | Solid solution acid whitening + RT% flaw detection | |||||||
| Forgings | Annealing + polishing | |||||||
| Rod | Forged state, surface polished or polished | |||||||
| strip | Cold rolled, solid solution soft state, descaled delivery | |||||||
| wire material | Delivered in solid solution pickled disc shape or straight strip shape, solid solution straight strip in fine polished state | |||||||
