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I. 304, in accordance with the national standard 0Cr18Ni9, is a widely used type of steel that possesses good corrosion resistance, heat resistance, strength at low temperatures, and mechanical properties； It has good hot workability for stamping, bending, etc., and shows no hardening due to heat treatment (non-magnetic, operating temperature: -196°C to 800°C). 304L, in accordance with national standards and designated as 00Cr19Ni10, is a low-carbon version of 304 steel. Under normal conditions, its corrosion resistance is similar to that of 304 steel; however, after welding or stress relief, it exhibits excellent resistance to intergranular corrosion. It can also maintain good corrosion resistance even without heat treatment, and its operating temperature range is from -196°C to 800°C. It is used in outdoor machinery in the chemical, coal, and petroleum industries where high resistance to intergranular corrosion is required, as well as in building materials for heat-resistant components and in parts for which heat treatment is difficult. 304H is an austenitic stainless heat-resistant steel that boasts good corrosion resistance and weldability, as well as decent thermal strength. It is primarily used in large boilers, superheaters, reheaters, steam pipelines, and exchangers in the petrochemical industry. 304N, according to national standards and designated as 0Cr19Ni9N, is a nitrogen-containing stainless steel. Compared to 304, it has reduced levels of S and Mn, with nitrogen added to prevent a decrease in plasticity and to enhance the strength of the steel ； Improves resistance to pitting corrosion, crevice corrosion, and intergranular corrosion. Application range: It is the most widely used in stainless steel applications and is suitable for petroleum and chemical equipment. Suitable for manufacturing acid transport pipelines, containers, etc. 304N2 corresponds to the national standard 0Cr19Ni10NbN; it is a high-strength steel intended for structural applications, with N and Nb added compared to 304. Suitable for: components, street lights, water pipes, water storage tanks, etc. 316 is a molybdenum-containing stainless steel grade. Due to the molybdenum in the steel, its overall performance is superior to that of 310 and 304 stainless steels. Under high-temperature conditions, when the sulfuric acid concentration is below 15% or above 85%, 316 stainless steel has a wide range of applications. 316 stainless steel also has good resistance to chloride corrosion, which is why it is commonly used in marine environments. Corrosion resistance: It has better corrosion resistance than 304 stainless steel, and exhibits excellent corrosion resistance during the pulp and paper manufacturing process. Moreover, 316 stainless steel is also resistant to corrosion by marine and aggressive industrial atmospheres. Heat resistance: 316 stainless steel exhibits good oxidation resistance when used intermittently at temperatures below 1600 degrees and continuously at temperatures below 1700 degrees. It is not advisable to expose 316 stainless steel to continuous stress in the range of 800–1575 degrees, but it retains good heat resistance when used continuously outside this temperature range. 316L stainless steel has better resistance to carbide precipitation than 316 stainless steel, and can be used within the aforementioned temperature range. Heat treatment: Annealing is carried out at temperatures ranging from 1850 to 2050 degrees, followed by rapid annealing and then rapid cooling. 316 stainless steel cannot be hardened by heat treatment. Welding: 316 stainless steel has good weldability. All standard welding methods can be used for welding. During welding, stainless steel filler rods or electrodes such as 316Cb, 316L, or 309Cb can be used depending on the application. To achieve the best corrosion resistance, the welded section of 316 stainless steel requires post-weld annealing. If 316L stainless steel is used, no post-weld annealing is required. Typical uses: heat exchangers in pulp and paper manufacturing equipment, dyeing equipment, film developing equipment, pipes, and materials for the exterior of buildings in coastal areas. 316Ti is obtained by adding Ti to SUS316 steel to improve its resistance to intergranular corrosion, and it is used in industries such as petrochemicals, mechanical and electrical hardware, building boiler and gas equipment, food and medical devices, plumbing fixtures, ships, and power plants. 316L: Corresponding to the national standard 00Cr17Ni14Mo2, it is part of the low-C series of 316 steel; in addition to sharing the same properties as 316 steel, it offers better resistance to intergranular corrosion than 316. Applied to: products with special requirements to resist intergranular corrosion in special applications involving 316 steel. 317L (UNS S31726) alloy is a molybdenum-based austenitic stainless steel. Compared to conventional chromium-nickel austenitic stainless steels such as 304 alloy, it possesses greater resistance to chemical corrosion. Furthermore, compared to conventional stainless steel, 317L alloy possesses higher ductility, stress corrosion resistance, compressive strength, and high-temperature resistance. It is of the low-carbon grade or L grade, which possesses resistance to sensitization during welding and heat treatment processes. Standard 321 0Cr18Ni9Ti incorporates titanium to prevent grain boundary corrosion; it is suitable for use at temperatures ranging from 430°C to 900°C, and is applied in aircraft, exhaust pipes, boiler drums, and other similar applications. 347/0Cr18Ni11Nb: This material belongs to the Ni-Cr-Mo type of austenitic stainless steel, and it possesses excellent resistance to grain-oriented corrosion. It exhibits good corrosion resistance in acids, alkalis, and salts, as well as good oxidation resistance and weldability in air at temperatures below 800°C. Stainless steel 347 exhibits excellent properties in terms of stress rupture at high temperatures, as well as creep resistance; its mechanical properties are superior to those of stainless steel 304. This material is widely used in industries such as aviation, power generation, chemistry, petrochemicals, food, and papermaking. 309S: (0Cr23Ni13) Characteristics: It can withstand repeated heating up to 980 ℃, and possesses high strength at high temperatures as well as good oxidation resistance and carburization resistance. Use: Materials for furnaces. 310S: (0Cr25Ni20/0Cr25Ni20Si2); commonly known as 2520 in China. Characteristics: suitable for manufacturing various furnace components; maximum temperature of 1200 ℃, continuous service temperature of 1150 ℃. Uses: Materials for furnaces, materials for automotive purification devices. 15-5PH: Corresponds to the national standard 0Cr15Ni5Cu3Nb; it is a martensitic, precipitation-hardening stainless steel containing chromium, nickel, and copper. It boasts good strength, as well as toughness and ductility. In terms of hardness and corrosion resistance, it compares favorably with 304 stainless steel. It has excellent workability and mechanical properties, and is resistant to ordinary corrosive environments. It can be processed under various conditions, achieving the best service life when processed under H1150M conditions. Application areas: Aerospace, aircraft parts, manufacturing of high-pressure valves in corrosive environments, sockets, fasteners, as well as various equipment and apparatuses. 17-4PH (630) and 0Cr17Ni4Cu4Nb are martensitic precipitation-hardening stainless steels that possess high strength and hardness. These steels can be welded, and they are currently widely used in valves, shafts, and the fiber industry. 17-7PH, which corresponds to the national standard 0Cr17Ni7Al in China and SUS631 in Japan, is a dispersion-hardening stainless steel. It features high strength and hardness, fatigue resistance, as well as good corrosion resistance and formability. It also shows little deformation at high temperatures. This steel has excellent properties and is particularly suitable for use in the aerospace industry; this special alloy is also appropriate for other applications that require high strength and corrosion resistance. Its spring properties remain good even at temperatures up to 316°C. Used in aerospace, chemical engineering, petrochemicals, papermaking, and metal processing industries. 253MA: Properties: 253MA from Avesta Sheffield AB is a heat-resistant austenitic stainless steel, designed for applications that require high creep strength and excellent corrosion resistance. Its operating temperature range is 850~1100 ℃. Purpose: In addition to the alloying elements chromium and nickel, this grade of stainless steel also contains small amounts of rare earth metals, which significantly improves its oxidation resistance. Nitrogen was added to improve creep properties and make this steel fully austenitic. Although the chromium and nickel contents are relatively low, this type of stainless steel exhibits high-temperature properties similar to those of highly alloyed alloy steels and nickel-based alloys in many cases. 904L super austenitic stainless steel: 904L (00Cr20Ni25Mo4.5Cu, UNS: N08904, EN: 1.4539) is a highly alloyed austenitic stainless steel with a very low carbon content. It exhibits excellent corrosion resistance in dilute sulfuric acid and is designed for use in environments with severe corrosive conditions. It has a high chromium content and sufficient nickel content; the addition of copper endows it with strong acid resistance. It exhibits high resistance to chloride intergranular corrosion and stress corrosion cracking, and is less prone to the formation of corrosion spots and cracks. Its pitting resistance is slightly better than that of other steel grades. It also possesses good machinability and weldability, making it suitable for use in pressure vessels. S21800 (Nitronic 60/218 alloy): (Hastalloys 21800) features high strength and excellent corrosion resistance, as well as high ductility. Its yield strength is twice that of 304 and 316 stainless steels, and it remains tough under stress. It offers high resistance to chloride intergranular corrosion and stress corrosion cracking, with a tensile strength exceeding 200 times that of other materials. It is used in applications such as valves, locking systems, roller bearings, pump wells, food processing, the pharmaceutical industry, the automotive sector, aerospace, and nuclear power. II. Duplex stainless steel: Duplex stainless steel refers to a type in which ferritic and austenitic phases are present in equal amounts within its microstructure; generally, the minimum proportion of each phase should be around 30%. Due to the characteristics of the two-phase structure, by properly controlling the chemical composition and heat treatment processes, DSS combines the advantages of ferritic stainless steels and austenitic stainless steels. 1. Compared with austenitic stainless steels, the advantages of duplex stainless steels are as follows: (1) Their yield strength is more than twice that of ordinary austenitic stainless steels, and they possess sufficient plasticity and toughness for shaping. Using duplex stainless steel to manufacture the walls of storage tanks or pressure vessels reduces the wall thickness by 30-50% compared to conventional austenitic steels, which helps to lower costs. (2) It possesses excellent resistance to stress corrosion cracking; even the duplex stainless steels with the lowest alloy content have a higher resistance to stress corrosion cracking than austenitic stainless steels, especially in environments containing chloride ions. Stress corrosion is a prominent problem that is difficult to address in conventional austenitic stainless steels. (3) The corrosion resistance of 2205 duplex stainless steel, which is the most widely used in many media, is superior to that of conventional 316L austenitic stainless steel. Super duplex stainless steel possesses extremely high corrosion resistance; in some media such as acetic acid and formic acid, it can even replace highly alloyed austenitic stainless steels as well as corrosion-resistant alloys. (4) It possesses good resistance to localized corrosion; compared with austenitic stainless steels with similar alloy contents, it exhibits superior performance in terms of wear corrosion and fatigue corrosion resistance. (5) It has a lower linear expansion coefficient than austenitic stainless steels and is close to that of carbon steel, making it suitable for joining with carbon steel; this holds significant engineering importance, such as in the production of composite sheets or linings. (6) Under both dynamic and static loading conditions, austenitic stainless steel possesses a higher energy absorption capacity; this gives duplex stainless steel a clear advantage in enabling structural components to withstand sudden accidents such as collisions and explosions, making it practically useful. Compared to austenitic stainless steels, the disadvantages of duplex stainless steels are as follows: (1) Their versatility and range of applications are lower than those of austenitic stainless steels; for example, their operating temperature must be kept below 250 degrees Celsius. (2) Its plasticity and toughness are lower than those of austenitic stainless steels, and its cold and hot working capabilities as well as formability are inferior to those of austenitic stainless steels. (3) There is a medium-temperature brittleness zone; therefore, the heat treatment and welding procedures must be strictly controlled to prevent the formation of harmful phases that could degrade performance. 2. Compared with ferritic stainless steels, the advantages of duplex stainless steels are as follows: (1) Their comprehensive mechanical properties are better than those of ferritic stainless steels, especially in terms of plasticity and toughness; they are not as sensitive to brittleness as ferritic stainless steels. (2) Except for its resistance to stress corrosion, its resistance to other forms of local corrosion is superior to that of ferritic stainless steels. (3) Its cold working process properties and cold forming properties are far superior to those of ferritic stainless steels. (4) Its weldability is also far superior to that of ferritic stainless steels; generally, no preheating is required before welding, and no heat treatment is needed after welding. (5) Its application range is wider than that of ferritic stainless steels. Compared to ferritic stainless steels, the disadvantages of duplex stainless steels are as follows: they contain high levels of alloying elements, resulting in a relatively high price; whereas typical ferritic steels do not contain nickel. Duplex stainless steels can generally be divided into four categories: The first category is the low-alloy type, represented by the grade UNS S32304 (23Cr-4Ni-0.1N). This steel does not contain molybdenum, and its PREN value is 24–25; it can be used as a substitute for AISI 304 or 316 in terms of resistance to stress corrosion. In the second category are the alloy types; the representative grade is UNS S31803 (22Cr-5Ni-3Mo-0.15N), with a PREN value of 32–33. Its corrosion resistance lies between that of AISI 316L and 6%Mo+N austenitic stainless steels. The third category belongs to the high-alloy type; it generally contains 25% chromium, as well as molybdenum and nitrogen, and some variants also contain copper and tungsten. The standard grade is UNSS32550 (25Cr-6Ni-3Mo-2Cu-0.2N), with a PREN value of 38–39. The corrosion resistance of these steels is higher than that of 22%Cr duplex stainless steels. The fourth category consists of super duplex stainless steels, which contain high levels of molybdenum and nitrogen; the standard grade is UNS S32750 (25Cr-7Ni-3.7Mo-0.3N). Some of these steels also contain tungsten and copper. Their PREN value is greater than 40, allowing them to be used in harsh environmental conditions. They exhibit excellent corrosion resistance as well as mechanical properties, and can compete with super austenitic stainless steels. The three most commonly used types are as follows: S31254 (F44/254SMo): 254SMO (00Cr20Ni18Mo6CuN, UNS S31254, F44) is a super austenitic stainless steel containing 6% molybdenum; it has high PRE values as well as high CPT/CCT values. It is widely used in the marine and desalination industries, seawater treatment, chlorine-containing bleaching equipment, chlorine dioxide-related equipment, and flue gas desulfurization systems. F51(S31803), also known as 2205 or 00Cr22Ni5Mo3N, is a duplex stainless steel composed of 22% chromium, 3% molybdenum, and 5–6% nickel-nitrogen alloy. It possesses high strength, good impact toughness, as well as excellent overall and local resistance to stress corrosion. Compared to 316L and 317L austenitic stainless steels, the 2205 alloy exhibits superior performance in terms of resistance to pitting and cracking. It has high corrosion resistance; compared to austenitic steels, it has a lower coefficient of thermal expansion and higher thermal conductivity. Application areas: pressure vessels, high-pressure storage tanks, high-pressure pipelines, heat exchangers (chemical processing industry). Exchangers and condensers, as well as their accessories, made of petroleum and natural gas pipelines, heat exchanger fittings, etc., that can withstand seawater, high temperatures, and concentrated nitric acid. The SAF2507 (F53/UNS S32750) alloy is composed of 25% chromium, 4% molybdenum, and 7% nickel. It has high strength and corrosion resistance, and is mainly used in chemical processing, petrochemical industries, and underwater equipment. It has strong resistance to chloride corrosion, high thermal conductivity, and a low coefficient of thermal expansion. Its high levels of chromium, molybdenum, and nitrogen confer excellent resistance to pitting, crevice corrosion, and general corrosion. Application areas: Equipment in the oil and gas industry, offshore platforms, heat exchangers, underwater equipment, fire-fighting equipment; the chemical processing industry, as well as the manufacturing of vessels and pipelines; desalination plants, high-pressure RO plants, and submarine pipelines. Mechanical components requiring high strength and corrosion resistance; FGD systems in the energy industry, industrial cleaning systems, and absorption towers. F55/S32760/Zeron 100/00Cr25Ni7Mo3.5WCuN – an ultra-high-strength duplex stainless steel that was first used in harsh underwater oil and gas field conditions involving chlorides, CO2, and H2S. It features high strength, excellent resistance to localized corrosion and stress corrosion caused by chlorides, and is weldable. In terms of mechanical properties, the yield strength of this steel grade is 2 to 3 times that of 316L ； Its corrosion resistance is twice that of 904L. III. Nickel Alloys: Nickel alloys are non-ferrous alloys formed by adding other elements to a nickel matrix. Classified by application: ① Nickel-based superalloys. The main alloying elements include chromium, tungsten, molybdenum, cobalt, aluminum, titanium, boron, zirconium, etc. Chromium plays a role in providing antioxidant and corrosion-resistant properties, while the other elements serve to strengthen the material. At high temperatures of 650–1000°C, they possess high strength as well as excellent oxidation and flame corrosion resistance; they are the most widely used type of superalloy with the highest high-temperature strength. Used to manufacture turbine blades for aero engines, as well as high-temperature components for rocket engines, nuclear reactors, and energy conversion equipment. ②Nickel-based corrosion-resistant alloys. The main alloying elements are copper, chromium, and molybdenum. It possesses excellent comprehensive properties and can resist various acid corrosions as well as stress corrosion. The first material to be used was a nickel-copper alloy, also known as Monel alloy ； In addition, there are nickel-chromium alloys, nickel-molybdenum alloys, nickel-chromium-molybdenum alloys, and so on. Used to manufacture various corrosion-resistant components. ③Nickel-based wear-resistant alloy. The main alloying elements are chromium, molybdenum, and tungsten, with small amounts of niobium, tantalum, and indium as well. In addition to its wear resistance, it also has good oxidation resistance, corrosion resistance, and weldability. It can be used to manufacture wear-resistant components, and it can also serve as a coating material, which is applied to the surface of other base materials through surfacing and spraying processes. ④Nickel-based precision alloys. These include nickel-based soft magnetic alloys, nickel-based precision resistance alloys, and nickel-based electric heating alloys, among others. The most commonly used soft magnetic alloy is Boma alloy, which contains about 80% nickel; it features high maximum and initial permeability as well as low coercivity, making it an important core material in the electronics industry. The main alloying elements of nickel-based precision resistance alloys are chromium, aluminum, and copper. These alloys possess a high resistivity, a low temperature coefficient of resistivity, and good corrosion resistance, and are used to manufacture resistors. Nickel-based electric heating alloys are nickel alloys containing 20% chromium; they possess excellent oxidation and corrosion resistance, and can be used for extended periods at temperatures between 1000 and 1100°C. ⑤Nickel-based shape memory alloys. Nickel alloy containing 50 (at)% titanium. Its recovery temperature is 70°C, and it exhibits good shape memory performance. Slightly altering the ratio of nickel to titanium can vary the recovery temperature within the range of 30–100°C. It is widely used in manufacturing automatically expanding structural components for spacecraft, self-actuating fasteners for the aerospace industry, and artificial heart pumps for biomedical applications. ■High-nickel alloys can be applied in the following industries: 1. Heat treatment industry. Such as furnace rolls, bell-type furnaces, and annealing furnaces, etc. 2. Kiln. It can be used for calcination to produce high-performance corundum, for the calcination of chromite to produce ferrochrome, and for the recovery of nickel used as a catalyst in the petrochemical industry. 3. Chemical and petrochemical industries, which use it to manufacture new steam cracking crude gasoline furnaces for producing hydrogen, etc. 4. Automation devices. Such as catalytic support systems, spark plugs. 5. Cleaning equipment for the nuclear industry, such as nuclear waste removal. 6. Iron and steel industry. Such as the direct reduction of iron ore process to produce sponge titanium. ■Applications in the automotive industry: 1. Valve seals. It possesses excellent properties such as antioxidant effects, high-temperature resistance, and resistance to sulfidation. 2. Spraying material. …… The commonly used variants are as follows: NS143, also known as 20# alloy or Carpenter20Cb3, is a corrosion-resistant alloy with many excellent properties. It offers good resistance to oxidative and moderately reducing corrosion, as well as superior resistance to stress corrosion cracking and local corrosion. It exhibits satisfactory corrosion resistance in various chemical process media, including highly corrosive inorganic acid solutions, chlorine and various chloride-containing media, dry chlorine, formic acid and acetic acid, anhydrides, seawater, and brine. Features include oxidation resistance &mdash ； Corrosion in reducing composite media. It is used in sulfuric acid environments as well as in sulfuric acid solutions containing halide ions and metal ions, such as in hydrometallurgical processes and sulfuric acid industry facilities. NS111 is also known as N08810/Incoloy800; according to national standards it is designated as 0Cr20Ni32AlTi. It is suitable for use under condensing conditions in media containing F-, Cl-, and ammonia; it also exhibits good corrosion resistance in H2SO4, HNO3, and their mixed solutions. It resists pressure corrosion and polyethylene corrosion. It is mainly used in nuclear generators, water heaters, gas coolers, and waste steam boilers. Incoloy800H, X5NiCrAlTi 31.20, German standard 1.4958, Chinese standard 1Cr20Ni32AlTi, and American standard N08810 – also known as NS112 – are alloys with excellent oxidation resistance. They are resistant to corrosion, capable of withstanding high temperatures, and possess high heat strength. These alloys also have good mechanical properties, corrosion resistance, machinability, and weldability, making them versatile alloys with strong resistance to various types of corrosion. Resistant to steam, soft water, steam-air-CO3 mixtures, various acid solutions, salts, and H2S corrosion. Inconel 718 alloy: It exhibits excellent overall performance within the temperature range of –253 to 700°C. Its yield strength below 650°C is the highest among all superalloys that can be deformed at high temperatures. It also boasts good fatigue resistance, radiation resistance, oxidation resistance, and corrosion resistance. In addition, it has good machinability, weldability, and long-term structural stability, allowing it to be used to manufacture components of various complex shapes. It is widely utilized in the aerospace, nuclear energy, and petroleum industries within these temperature ranges. Similar grades: China: GH4169; Germany: W.Nr.2.4668; France: Nc19FeNb, NS322, Hastelloy B-2. These alloys resist corrosion in strongly reducing media and improve resistance to intergranular corrosion; they can be used in environments with hydrochloric acid and sulfuric acid at high temperatures. Other similar grades include NS334, American standard Hastelloy C276, Chinese standards 00Cr15Ni60Mo16W5Fe5, N10276, Inconel 625. These are corrosion-resistant alloys with many excellent properties; they offer good resistance to oxidative and moderately reducing corrosion, as well as excellent resistance to stress corrosion cracking and local corrosion. They exhibit satisfactory corrosion resistance in various chemical process media, including highly corrosive inorganic acid solutions, chlorine and various chloride-containing media, dry chlorine, formic acid and acetic acid, anhydrides, seawater, and saltwater. NS312 Inconel 600 is resistant to corrosion in high-temperature oxide environments; it is used in devices in the heat treatment and chemical processing industries. Inconel 625 is a nickel-chromium-molybdenum alloy with a small amount of niobium added to enhance the alloy’s hardness, allowing it to achieve high strength without the need for heat treatment. This alloy can resist corrosion in various harsh acidic environments, especially pitting and crevice corrosion. It is utilized in chemical processing, the aviation industry, turbine engines, pollution control equipment, and nuclear reaction systems. Grades: NS336, Inconel 625. The GH169 alloy exhibits high yield strength and good plasticity at temperatures below 650°C, along with excellent welding and formability. It also has good corrosion resistance, oxidation resistance, and radiation resistance. Its structural properties remain stable within a temperature range of -253°C to 700°C. The GH145 alloy possesses good strength at temperatures below 980°C, as well as excellent corrosion and oxidation resistance; it also has good performance at low temperatures and good formability, and is primarily used for components in aviation and industrial gas turbines. Inconel X-750, GH132, Japanese standard SUH660, and Chinese standard 0Cr15Ni25Ti2MoAlVB. This alloy exhibits high yield strength as well as good endurance and creep strength at temperatures below 650°C; it also possesses good workability and satisfactory weldability. It maintains high yield strength, endurance, and creep strength at temperatures below 650°C, along with good workability and satisfactory weld properties. Application areas: High-temperature components used at 650°C, turbine discs for the petrochemical, railway, and nuclear industries, as well as screws and bolts in related sectors. IV. Heat-resistant alloy steels such as F5, F9, F11, F22, F91, etc. Our company supplies these materials in the form of round bars, sheets, pipes, wires, forgings, ingots, flanges, and accessories. We can supply Φ8-130 hot-rolled round bars and Φ120-350 forged round bars. Forged round bars with a diameter of less than Φ120 can be produced according to customer requests, as well as forged bars with a maximum diameter of 700. Steel ingots of various specifications are available, including round or angular bars, channel bars, and flat bars. Cold-drawn round bars with diameters ranging from Φ5 to Φ60, as well as turned round bars with diameters from Φ60 to Φ200, are also available. And it also undertakes the forging business for this material. The company has obtained the ISO9001:2000 quality certification from Lloyd’s Register in the UK and CCS in China; it has also received the PED/97/23/EC EU certification for pressure equipment materials from TUV, as well as the AD2000-W0 certification for pressure equipment materials in Germany. In addition, it is compliant with Russia’s GOST quality certification system ； Guobang Steel Industry has many years of experience in manufacturing marine steel pipes. It holds certifications from BV and KR classification societies, as well as from CCS, ABS, GL, NK, DNV, and LR classification societies. The available steel grades include 304, 304L, 304H, 304N, 316L, 316Lmod, 316Ti, 317L, 310S, 321, 321H, 347H, S31803, S32750, 347, 330, 904L, GH800, GH3030, NI99.9, 314, NS312, Monel400, and more. The products are exported to Western Europe, North America, South America and other regions.