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Hastelloy C-22: nickel, chromium, molybdenum, tungsten metal alloy, corrosion resistance to many industrial chemicals, excellent weldability. Hastelloy C22 alloy is a versatile nickel-chromium-molybdenum-tungsten alloy with better overall corrosion resistance than other existing nickel-chromium-molybdenum alloys, including Hastelloy C276, C4 alloy and 625 alloy. Hastelloy C22 alloy has good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media, including wet chlorine, nitric acid or mixtures of oxidizing acids containing chloride ions. At the same time, Hastelloy C22 alloy also has the ideal ability to resist the reducing and oxidizing environment encountered in the process. Relying on this versatile performance, it can be used in some troublesome environments, or applied in factories with various production purposes. Hastelloy C22 alloy has exceptional resistance to various chemical environments, including strong oxidizing substances, such as ferric chloride, copper chloride, chlorine, thermally polluted solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, sea water and salt solution etc. Hastelloy C22 alloy has the ability to resist the formation of grain boundary precipitation in the welding heat-affected zone, which makes it suitable for many chemical process applications in the welded state. Hastelloy C22 alloy is suitable for a variety of chemical process industries containing oxidizing and reducing media. The higher content of molybdenum and chromium makes the alloy resistant to the corrosion of chloride ions, and the tungsten element further improves its corrosion resistance. Hastelloy C22 is one of the few materials that can resist the corrosion of moist chlorine, hypochlorite and chlorine dioxide solutions. The alloy has remarkable corrosion resistance to high concentration chloride salt solutions (such as ferric chloride and copper chloride).
Haynes 214: Precipitation hardening nickel alloy with oxidation resistance up to 2000ºF. For furnace parts exposed to chromium carbon, chlorine pollution and chlorinated environment and gas turbine parts.
Haynes230: nickel, chromium, molybdenum, tungsten alloy, has excellent long-term oxidation resistance in environments with temperatures as high as 2100ºF.
Monel400: solid solution and high strength alloy in a wide temperature range, suitable for electronic components and springs. Corrosion and oxidation resistant up to 1000ºF. Monel400 is a corrosion-resistant alloy with the largest amount, the widest application and excellent comprehensive performance. This alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas medium, and also has excellent corrosion resistance to hot concentrated lye. At the same time, it is also resistant to corrosion by neutral solutions, water, sea water, atmosphere, organic compounds, etc. An important feature of this alloy is that it generally does not produce stress corrosion cracks and has good cutting performance. The corrosion resistance of Monel is generally superior to that of nickel copper. It is more resistant to the corrosion of reducing media than pure nickel, and more resistant to corrosion of oxidizing media than pure copper. It has very good corrosion resistance to sulfuric acid, phosphoric acid, and carbon. Especially resistant to hydrochloric acid corrosion, also has excellent corrosion resistance to hot concentrated alkali. Monel400 alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. At the same time, it is more corrosion resistant than copper-based alloys in seawater.
Monel400 is a nickel-copper nickel-based alloy that can be deformed. It has good resistance to seawater corrosion and chemical corrosion, and has strong resistance to chloride stress corrosion cracking. This alloy is one of the few alloys that can be used in fluoride. It has good resistance to oxide stress cracking corrosion in hydrofluoric acid and fluorine gas medium, such as seawater and salt water environment. Monel 400 also has very good corrosion resistance in moderately concentrated alkaline and salt solutions.
Inconel600: high corrosion resistance, and has excellent strength and easy processing characteristics. Mainly used in corrosive environment. Oxidation resistant up to 2150ºF.
Inconel600 is suitable for welding with the same material or other metals by any traditional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal inert gas shielded welding, metal inert gas shielded welding, among which pulse arc Welding is the preferred option. When using manual arc welding, it is recommended to use (Ar+He+H2+CO2) shielding gas mixed with multiple components. The alloy can be strengthened by cold working, and can also be connected by resistance welding, welding or brazing. It is suitable for making anti-oxidation parts that withstand low loads below 1100 °C
1. Has good resistance to reduction, oxidation, and nitriding medium corrosion performance
2. It has good resistance to stress corrosion cracking at room temperature and high temperature
3. It has good corrosion resistance to dry chlorine gas and hydrogen chloride gas
4. It has good mechanical properties at subzero temperature, room temperature and high temperature
Due to the control of carbon content and grain size, it has good creep rupture strength and is recommended for use in working environments above 700°C.
Inconel625: extremely high corrosion resistance and machinability. Suitable for environments ranging from cryogenic temperatures up to 2000ºF.
This alloy has the following properties:
1. Excellent corrosion resistance to various corrosive media in oxidizing and reducing environments
2. Excellent resistance to pitting corrosion and crevice corrosion, and will not produce stress corrosion cracking caused by chlorides
3. Excellent corrosion resistance to inorganic acids, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and mixed acids of sulfuric acid and hydrochloric acid, etc.
4. Excellent resistance to corrosion of various inorganic acid mixed solutions
5. When the temperature reaches 40°C, it can show good corrosion resistance in various concentrations of hydrochloric acid solutions
6. Good processability and weldability, no post-weld cracking sensitivity
7. Manufacturing certification for pressure vessels with a wall temperature of -196 to 450°C
8. Certified by the NACE standard of the American Association of Corrosion Engineers (MR-01-75), it meets the highest standard grade VII for use in sour gas environments
Inconel718: High-strength, corrosion-resistant alloy for 423ºF to 1300ºF temperature environment, used in the nuclear industry.
Inconel718 alloy is a difficult-to-machine material in the field of machining. Precipitation-hardened Inconel718 alloy is very suitable for welding and has no tendency to crack after welding. Weldability, ease of processing, and high strength are several advantages of this material.
Inconel718 is suitable for arc welding, plasma welding, etc. Before welding, the surface of the material should be clean, free of oil, chalk marks, etc., and the shiny metal should be polished within 25mm around the welding seam. Due to its high temperature strength, excellent corrosion resistance and easy processing at 700 °C, it can be widely used in various high-demand occasions.
Inconel X750: Precipitation-hardening nickel-chromium alloy with strength for environments up to 1500ºF. Good corrosion and oxidation resistance.
Incoloy800: Nickel, iron, chromium alloy, has anti-carburization effect at high temperature. Suitable for welding with the same material or other metals by any traditional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal inert gas shielded welding, metal inert gas shielded welding, pulse arc welding is the preferred option. If manual arc welding is used, it is recommended to use (Ar+He+H2+CO2) as the shielding gas. The corrosion resistance is better than that of general austenitic stainless steel, and also better than that of Incolo 600 alloy; in the manufacture of corrosion-resistant stress cracking equipment, it is better than that of Incolo 600 and Monel 400 alloy.
Incoloy825: an alloy resistant to strong corrosion environments, such as sulfuric acid, phosphoric acid and sea water. The high nickel content gives the alloy effective resistance to stress corrosion cracking. Corrosion resistance in various media is very good, such as sulfuric acid, phosphoric acid, nitric acid and organic acids, alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solution. The high comprehensive performance of Incoloy 825 is reflected in nuclear combustion dissolvers with various corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide, which are all processed in the same equipment.
Incoloy 825 is suitable for welding with the same material or other metals by any traditional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal inert gas shielded welding, metal inert gas shielded welding, among which pulse Arc welding is the preferred option. When using manual arc welding, it is recommended to use (Ar+He+H2+CO2) shielding gas mixed with multiple components.
The welding of Incoloy 825 must be carried out in the annealed state, and the stains, dust and various marks should be cleaned with a stainless steel wire brush. When welding at the root of the weld, in order to obtain the best quality of the root weld, the operation must be very careful (argon 99.99), so that no oxides will be produced in the weld after the root is welded. The color produced in the welding heat-affected zone should be brushed off with a stainless steel brush when the weld area is not cooled.
Ni-Span-C902: Nickel, iron, chromium alloy, suitable for precision spring parts in environments with severe temperature changes.
Hastelloy C276: suitable for chemical industry, can be antioxidant. Able to replace HASTELLOY® C2 but with better machinability.
The various corrosion data of Hastelloy C-276 alloy are typical, but they cannot be used as specifications, especially in unknown environments, and materials must be selected after testing. There is not enough Cr in Hastelloy C-276 to resist corrosion in strongly oxidizing environments, such as hot concentrated nitric acid. The production of this alloy is mainly for the chemical process environment, especially in the presence of mixed acid, such as the discharge pipe of the flue gas desulfurization system.
The mechanical properties of Hastelloy alloy are very outstanding. It has the characteristics of high strength and high toughness, so it has certain difficulties in machining, and its tendency to strain hardening is extremely strong. When the deformation rate reaches 15%, it is about 18-8 Twice as much as stainless steel. There is also a medium temperature sensitization zone in Hastelloy alloy, and its sensitization tendency increases with the increase of deformation rate. When the temperature is high, the Hastelloy alloy is easy to absorb harmful elements, which reduces its mechanical properties and corrosion resistance.
Hastelloy C-276 alloy belongs to nickel-molybdenum-chromium-iron-tungsten nickel-based alloy. It is one of the most corrosion-resistant modern metal materials. It is mainly resistant to wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance in low temperature and medium temperature hydrochloric acid. Therefore, in the past three decades, it has been widely used in harsh corrosive environments, such as chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper, environmental protection and other industrial fields.
The various corrosion data of Hastelloy C-276 alloy are typical, but they cannot be used as specifications, especially in unknown environments, and materials must be selected after testing. There is not enough Cr in Hastelloy C-276 to resist corrosion in strongly oxidizing environments, such as hot concentrated nitric acid. The production of this alloy is mainly for the chemical process environment, especially in the presence of mixed acid, such as the discharge pipe of the flue gas desulfurization system.
Hastelloy X: Jet engine components, including afterburners, vanes, tailpipes, honeycombs, bellows and ducts. Good strength and oxidation resistance at temperatures up to 2200ºF. It can be welded by various welding processes, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal inert gas shielded welding, and molten extremely inert gas shielded welding. Priority is given to the use of pulsed arc welding.
Before welding, the material needs to be in a solid solution treatment state to remove scale, oil stains and various marking marks, and the width of about 25mm on both sides of the weld needs to be polished to a bright metal surface. With low heat input, the interlayer temperature does not exceed 100°C. There is no need for pre-weld and post-weld heat treatment, due to its corrosion resistance in various atmospheres at high temperatures and excellent high-temperature strength, HastelloyX has been widely used in various high-temperature environments.
