| Hastelloy B/B-2(UNS N10665/W.Nr.2.4617) | |||||||||||||
| Chemical Composition Wt.% | % | Ni | Mo | Fe | Cr | Co | C | Mn | V | Si | P | S | |
| Hastelley B | Min | Balance | 26 | 4.0 | 0.2 | ||||||||
| Max | Balance | 30 | 6.0 | 1.0 | 2.5 | 0.05 | 1.0 | 0.4 | 1.0 | 0.04 | 0.03 | ||
| Hastelloy B-2 | Min | Balance | 26 | 2.0 | |||||||||
| Max | Balance | 30 | 7.0 | 1.0 | 1.0 | 0.02 | 1.0 | 0.1 | 0.04 | 0.03 | |||
| Physical Constants | Density.gicm³ | 9.24 g/cm³ | |||||||||||
| Meling Range℃ | 1330-1380℃ | ||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | Brinell Hardness HB | ||||||||
| Solution Treated | 690 | 310 | 40 | _ | |||||||||
| Microstryeture | Hastelloy B-2 features a face-centered cubic (FCC) lattice structure. By controlling the iron and chromium content to minimum levels, processing brittleness is reduced and the precipitation of the Ni4Mo phase between 700°C and 870°C is inhibited. | ||||||||||||
| Characters | 1. The content of iron and chromium is minimized to inhibit the formation of the β-phase Ni4Mo. 2.Excellent corrosion resistance in reducing environments. 3. Outstanding resistance to corrosion by moderately concentrated sulfuric acid and many non- oxidizing acids. 4. Good resistance to chloride-induced stress corrosion cracking (SCC). 5.Excellent resistance to corrosion by a wide range of organic acids. | ||||||||||||
| Corrosion Resistance | The nickel-molybdenum alloy Hastelloy B-2 features extremely low carbon and silicon contents. This minimizes the precipitation of carbides and other impurity phases in the weld heat-affected zone, thereby ensuring that the weld itself maintains sufficient corrosion resistance. Hastelloy B-2 alloy offers excellent corrosion resistance in reducing media, such as hydrochloric acid solutions across a wide range of temperatures and concentrations. It also performs very well in moderately concentrated sulfuric acid solutions, even those containing certain amounts of chloride ions. Additionally, it is suitable for use in acetic and phosphoric acid environments. It is important to note that this alloy material achieves its optimal corrosion resistance only when in the proper metallurgical condition and with a pure crystal structure. | ||||||||||||
| Applications | Hastelloy B-2 alloy finds extensive application in the chemical, petrochemical, energy manufacturing, and pollution control industries, particularly in processes involving sulfuric, hydrochloric, phosphoric, and acetic acids. | ||||||||||||
| Hastelloy B-3 | |||||||||||||||||
| Chemical Composition Wt.% | Alloy | % | Ni | Cr | Fe | Mo | W | Cu | Co | AI | Ti | Mn | C | Si | S | P | V |
| B-3 | Min | 65.0 | 1.0 | 1.0 | 27.0 | ||||||||||||
| Max | 3.0 | 3.0 | 32.0 | 3.0 | 0.2 | 3.0 | 0.5 | 0.2 | 3.0 | 0.01 | 0.1 | 0.0 | 0.03 | 0.20 | |||
| Physical Constants | Density g/cm³ | 9.22 | |||||||||||||||
| Melting Range℃ | 1370-1418℃ | ||||||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Test Temp Test ℃ | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | ||||||||||||
| Annealing treated | Room Temp | 820 | 420 | 53.4 | |||||||||||||
| Process performance and requirement sharacters | 1. The alloy possesses excellent forgeability; the recommended forging heating temperature is 1140°C, with a final forging temperature of 90o°C. 2.Theaveragegrain sizeof the alloyis closelyrelated to the degreeof deformation and the final forging temperature of the forgings. 3. The alloy exhibits satisfactory welding performance. Welding should be performed in the solution-treated state, followed by aging treatment after welding. | ||||||||||||||||
| Microstrycture | Hastelloy B-3 features a face-centered cubic (FCC) lattice structure. By controlling the iron and chromium content to minimum levels, the precipitation of the Ni4Mo phase between 700°C and 800°C is inhibited, thereby reducing the risk of processing embrittlement. | ||||||||||||||||
| Corrosion Resistance | The nickel-molybdenum alloy Hastelloy B-3 features extremely low carbon and silicon content, which minimizes the precipitation of carbides and other impurity phases in the weld heat-affected zone (HAZ); consequently, its weld seams also possess sufficient corrosion resistance. Hastelloy B-2 exhibits excellent corrosion resistance in reducing media, such as hydrochloric acid solutions across a wide range of temperatures and concentrations. It also demonstrates high resistance in medium-concentration sulfuric acid solutions (including those containing specific amounts of chloride ions), as well as in acetic acid and phosphoric acid environments. The alloy materials achieve optimal corrosion resistance only when maintained in an appropriate metallurgical state and a pure crystalline structure. | ||||||||||||||||
| Applications | Hastelloy B-3 alloy is suitable for all applications previously handled by the B-2 alloy. Like the B-2 alloy, B-3 is not recommended for use in environments containing ferric salts or cupric salts, as these salts can rapidly cause corrosive failure. When hydrochloric acid comes into contact with iron and copper, it reacts chemically to produce ferric and cupric salts. | ||||||||||||||||
| Hastelloy C-4(UNS NO6455) | ||||||||||||
| Chemical Composition Wt.% | % | Ni | Cr | Fe | C | Mn | Si | Mo | Al | Ti | P | S |
| min | Balance | 14.5 | 14 | 0.01 | ||||||||
| max | Balance | 17.5 | 3.0 | 0.15 | 1 | 0.05 | 17 | 0.7 | 0.2 | 0.02 | 0.03 | |
| Physical Constants | Density.g/cm³ 8.6 g/cm³ | |||||||||||
| Melting Range℃ 1335-1380℃ | ||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | Brinell Hardness HB | |||||||
| Solution Treated | 690 | 276 | 40 | ≤200 | ||||||||
| Microstrycture | The alloy features a face-centered cubic lattice structure, and its chemical composition ensures metallurgical stability and resistance to sensitization. | |||||||||||
| Characters | It exhibits excellent resistance to combined oxidizing-reducing corrosion in environments containing chloride ions, along with good microstructural stability at elevated temperatures. | |||||||||||
| Process performance | 1. During the heat treatment process, contact with sulfur, phosphorus,lead, and other low-melting-point metals must be avoided, as they can cause the alloy to become brittle.Care should be taken to remove contaminants such as marking paint, temperature- indicating paint, colored crayons,lubricating oils, and fuels. The sulfur content in the fuel should be as low as possible; specifically, the sulfur content in natural gas should be less than O.1%,and in heavy oil, it should be less than 0.5%. Electric furnace heating is the preferred choice because it allows for precise temperature control and provides a clean furnace atmosphere. Gas-fired furnaces are also acceptable provided that the furnace gas is sufficiently pure. 2. The hot working temperature range for this alloy is 108o°C to 9oo°C, followed by water cooling or other rapid cooling methods. To ensure optimal corrosion resistance, solution heat treatment should be performed after hot working. | |||||||||||
| Applications | This alloy is an austenitic low-carbon nickel-molybdenum-chromium alloy. The primary distinction between Nicrofer 6616 hMo and other earlier-developed alloys with similar chemical compositions lies in its low levels of carbon, silicon, iron, and tungsten. This specific chemical composition provides excellent stability within the temperature range of 650–1040°C, enhances resistance to intergranular corrosion, and, under proper manufacturing conditions, can help avoid susceptibility to knife-line attack and corrosion in the weld heat-affected zone. The alloy finds applications in flue gas desulfurization systems, pickling and acid regeneration plants, acetic acid and agricultural chemical production, titanium dioxide production (chloride process), electrolytic plating tanks, and similar demanding environments. | |||||||||||
| Hastelloy C-22(UNS N06022/W.Nr.2.4602) | ||||||||||||||||
| Chemical Composition Wt.% | Alloy | % | Ni | Cr | Mo | Fe | W | Co | C | Mn | Si | V | P | S | ||
| C-22 | Min | Balance | 20.0 | 12.5 | 2 | 2.5 | ||||||||||
| Max | Balance | 22.5 | 14.5 | 6 | 3.5 | 2.5 | 0.015 | 0.5 | 0.08 | 0.35 | 0.02 | 0.02 | ||||
| Physical Constants | Density g/cm³ | 8.9 | Melting Point ℃ | 1325-1370 | ||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Test Temp Test℃ | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | |||||||||||
| Solution Treated | Room Temp | 690 | 283 | 40 | ||||||||||||
| Characters | Hastelloy C-22 alloy is a versatile nickel-chromium-molybdenum-tungsten alloy offering superior overall corrosion resistance compared to many other existing nickel-chromium-molybdenum alloys, including Hastelloy C-276, C-4, and alloy 625. It exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. The alloy possesses outstanding resistance to oxidizing aqueous media, including wet chlorine, nitric acid, or mixed acids containing oxidizing acids with chloride ions. Hastelloy C-22 demonstrates exceptional immunity to a wide range of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, chlorine, hot contaminated solutions (organic and inorganic), formic and acetic acids, acetic anhydride, seawater, and brine solutions. A key advantage of Hastelloy C-22 is its ability to resist the formation of grain boundary precipitates in the weld heat-affected zone. This characteristic allows it to perform reliably in the as-welded condition for numerous chemical process applications. | |||||||||||||||
| Microstrycture | Hastelloy C22 features a Face-Centered Cubic (FCC) lattice structure. | |||||||||||||||
Corrosion Resistance | Hastelloy C22 alloy is suitable for a wide range of chemical process industries involving both oxidizing and reducing media. Its high molybdenum and chromium content enables the alloy to resist chloride ion attack, while the addition of tungsten further enhances its overall corrosion resistance. Hastelloy C22 is one of the few materials capable of withstanding corrosion from wet chlorine gas, hypochlorites, and chlorine dioxide solutions. Furthermore, the alloy exhibits exceptional resistance to high-concentration chloride salt solutions, such as ferric chloride and cupric chloride. | |||||||||||||||
| Applications | Additional Application Areas for Hastelloy C-22: 1.Acetic Acid / Acetic Anhydride; 2. Acid Leaching; 3. Cellophane Manufacturing; 4. Chlorination Systems; 5.Complex Mixed Acids; 6. Electrogalvanizing Tank Rolls; 7. Expansion Bellows; 8.Flue Gas Scrubber Systems; 9.Geothermal Wells; 10. Hydrogen Fluoride Furnace Scrubbe; 11.Incinerator Scrubber Systems;; 12.Nuclear Fuel Reclamation; 13.Pesticide Production; 14.Phosphoric Acid Production; 15.Pickling Systems; 16.Plate Heat Exchangers; 17.Selective Filtration Systems; 18.Sulfur Dioxide Cooling Towers; 19.Sulfonation Systems; 20.Tubular Heat Exchangers; 21.Overlay Welding Valves | |||||||||||||||
| Hastelloy C-276(UNS N10276/W.Nr.2.4819/NS336) | |||||||||||||||||
Chemical Composition Wt.% | Alloy | % | Ni | Cr | Mo | Fe | W | Co | C | Mn | Si | V | P | S | |||
| Hastelloy C | Min | Balance | 14.5 | 15 | 4 | 3 | |||||||||||
| Max | Balance | 16.5 | 17 | 7 | 4.5 | 2.5 | 0.08 | 1 | 1 | 0.35 | 0.04 | 0.03 | |||||
| C276 | Min | Balance | 14.5 | 15 | 4 | 3 | |||||||||||
| Max | Balance | 16.5 | 17 | 7 | 4.5 | 2.5 | 0.01 | 1 | 0.08 | 0.35 | 0.04 | 0.03 | |||||
| Physical Constants | Density.g/cm³ | 8.9 g/cm³ | |||||||||||||||
| Melting Range℃ | 1325-1370℃ | ||||||||||||||||
| Minimum Mechanical Properties at Room Temperature | Typical Mechanical Properties | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 | Elongation A5% | Brinell Hardness HB | ||||||||||||
| Solution Treated | 690 | 283 | 40 | _ | |||||||||||||
| Microstrycture | Hastelloy C276 features a Face-Centered Cubic (FCC) lattice structure. | ||||||||||||||||
| Characters | 1.Excellent corrosion resistance to most corrosive media under both oxidizing and reducing conditions. 2.Outstanding performance in resisting pitting corrosion, crevice corrosion, and stress corrosion cracking (SCC). | ||||||||||||||||
| Applications | Other Application Fields for Hastelloy C-276: 1. Pulp and paper industry, such as digestion and bleaching vessels. 2.FGD (Flue Gas Desulfurization) systems,including scrubbers, reheaters, and wet steam fans. 3.Equipment and components operating in sour gas (acidic gas) environments. 4. Reactors for acetic acid and other acidic products. 5. Sulfuric acid condensers. 6. Production of Methylene Diphenyl Diisocyanate (MDI). 7.Production and processing of impure phosphoric acid. | ||||||||||||||||