The common high-nickel alloy pipe grades include Nickel 200/201, Monel 400/K500, Inconel 600/625/718, Incoloy 800, and Alloy C-series alloys.
High Nickel Alloy Pipe
We at Zhejiang Xintongda Special Steel are a trusted manufacturer and global supplier of high-nickel alloy seamless pipes based in Songyang, China. We produce these pipes for demanding industrial applications using advanced manufacturing processes in accordance with international standards. The chemical composition of our nickel-based alloys varies by grade and is alloyed with elements such as chromium, molybdenum and niobium. Our alloy composition provides high corrosion resistance, strong mechanical performance, and stability at elevated temperatures in both reducing and oxidising environments. We offer nickel-based alloys that are used in high-temperature applications, such as the oil and gas, chemical processing, aerospace, and power generation industries, as each pipe operates under harsh conditions. As a multiple international certified company, we maintain an annual production capacity of 25,000 tons and extensive global logistics capabilities. We ensure a consistent supply worldwide.
We at Zhejiang Xintongda Special Steel are a trusted manufacturer and global supplier of high-nickel alloy seamless pipes based in Songyang, China. Our nickel-based alloys vary by grade and are alloyed with elements that consist of chemical compositions, including chromium, molybdenum, and niobium. We manufacture these pipes for demanding industrial applications using advanced manufacturing processes in accordance with international standards.
Specifications
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OD Range
6-457 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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Properties and Features of High Nickel Alloy Pipe
High-temperature alloy piping is ideal for harsh environments due to its superior mechanical and physical properties. This metal alloy tubes is corrosion-resistant in aqueous and high-temperature conditions. Nickel alloys retain mechanical strength and stability at elevated temperatures, oxidation resistance, and ductility. This makes the pipes suitable for producing thin tubes. The key properties are as follows:
- Corrosion Resistance: High-performance nickel alloy provides excellent corrosion resistance due to its elevated nickel content, combined with elements like chromium and molybdenum. The above elements form a durable protective coating on the surface that inhibits chemical corrosion, rust, and material degradation. This feature is designed to provide prolonged service life and secure operation in hostile, high-temperature, and corrosive conditions.
- Excellent Toughness: High nickel alloys have exceptional toughness. This allows it to withstand impact and stress without cracking, even at extreme temperatures. The high nickel concentration strengthens the alloy structure and prevents brittle fracture.
- Strong Temperature Strength (High temperature strength): High nickel alloy maintains structural rigidity and resists deformation at high temperatures due to its stable atomic structure and internal hardening particles. This pipe remains strong and performs at temperatures where conventional steels would bend or fail.
- Good Resistance to Hydrofluoric Acid: Many grades of high-nickel alloy pipes offer excellent resistance to hydrofluoric acid due to its elevated nickel content. This forms a stable surface that slows and significantly resists chemical corrosion. This makes them suitable for HF acid use, where most steels fail rapidly.
- Oxidation Resistance: High-nickel alloy pipe is resistant to oxidation at high temperatures, as nickel forms a durable protective oxide layer that prevents surface deterioration. This ensures long-term strength and reliability in severe, high-temperature environments.
- Creep Resistance: This property arises from the increased nickel content and alloying elements, which stabilize the metal's structure and prevent deformation. It ensures safe and reliable performance in high-temperature environments.
Nickel-Based Alloy Comparison Table
This table outlines 15 popular nickel-based alloys by composition, core strengths, and typical applications for fast material selection in pipes facing corrosion, heat, or acids.
| NO. | Alloy | Main composition | Core Strengths / Performance | Typical Applications |
| 1 | Monel® 400 — Nickel-Copper Alloy (UNS N04400) | Ni–Cu (~67% Ni) | Excellent resistance to seawater & brines; good mechanical strength | Marine/offshore, seawater piping, valves, pumps. |
| 2 | Monel® K-500 — Precipitation-Hardened Nickel-Copper Alloy (UNS N05500) | Ni–Cu + Al, Ti (age-hardenable) | Much higher strength than 400; retains corrosion resistance | High-strength shafts, fasteners, pump parts in marine/oil-field service. |
| 3 | Nickel 200 — Commercially Pure Nickel (UNS N02200) | ≥99% Ni | High ductility, conductivity & caustic corrosion resistance | Caustic handling, chemical process, food, synthetic fibre equipment. |
| 4 | Nickel 201 — Low-Carbon Commercial-Purity Nickel (UNS N02201) | ≥99% Ni, low Carbon C ≤0.02% | Same benefits as 200 with improved high-temp stability | High-temperature caustic service, heat exchangers, chemical process equipment. |
| 5 | Inconel® 600 — Nickel-Chromium-Iron Alloy (UNS N06600) | ~72% Ni, 14–17% Cr, Fe | Strong oxidation & carburization resistance at elevated temperatures | Furnace parts, heat-treating, chemical processing. |
| 6 | Inconel® 601 — Nickel-Chromium-Aluminium Alloy (UNS N06601) | Ni-Cr with Al | Outstanding high-temp oxidation resistance; protective oxide scale | Thermal processing, hot-gas environments, industrial furnaces. |
| 7 | Inconel® 625 — Nickel-Chromium-Molybdenum-Niobium Alloy (UNS N06625) | Ni-Cr-Mo-Nb | Excellent pitting/SCC resistance; very high strength • ranges from cryogenic to elevated temp | Subsea, chemical processing, pollution control, high-temp structural parts. |
| 8 | Inconel® 718 — Precipitation-Hardened Nickel-Chromium-Niobium-Molybdenum Alloy (UNS N07718) | Ni-Cr-Nb-Mo (age-hardenable) | Exceptional high-temperature strength + superior weldability | Aerospace components, turbines, high-pressure/high-temp fasteners. |
| 9 | Incoloy® 800 — Nickel-Iron-Chromium Heat-Resistant Alloy (UNS N08800 / 800H / 800HT) | Ni-Fe-Cr | Excellent oxidation & carburization resistance; creep stability | Petrochemical heaters, reformer tubes, steam/boiler components. |
| 10 | Alloy® C-276 — Nickel-Molybdenum-Chromium-Tungsten Alloy (UNS N10276) | Ni-Mo-Cr-W | Top-tier corrosion resistance in oxidising + reducing media | Chemical reactors, chloride-contaminated acids, process industry. |
| 11 | Alloy® C-22 — Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06022) | Ni-Cr-Mo-W | Superior protection in mixed acids & chloride environments | Aggressive mixed-acid processes, pharmaceutical, chemical manufacture. |
| 12 | Alloy® C-2000 — Nickel-Chromium-Molybdenum-Copper Alloy (UNS N06200) | Ni-Cr-Mo-Cu | Broad-spectrum corrosion resistance, improved sulfuric acid performance | Sulfuric acid, mixed acid environments requiring both oxidizing & reducing resistance. |
| 13 | Alloy® B-2 — Nickel-Molybdenum Alloy (UNS N10665) | Ni-Mo | Exceptional resistance to reducing acids (especially HCl) | Equipment for hydrochloric / strong reducing acid service, pickling, acid reactors. |
| 14 | Alloy® B-3 — Nickel-Molybdenum Alloy (UNS N10675) | Ni-Mo (Improved version of B-2) | Same reducing-acid resistance with improved thermal stability | High-purity acid processing & chemical plants |
| 15 | Alloy® C-4 — Nickel-Chromium-Molybdenum Alloy (UNS N06455) | Ni-Mo-Cr-Ti | High-temperature stability + acid corrosion resistance | High-temperature chemical processing, flue gas desulfurization, pickling baths. |
High-Temperature Nickel Alloy Grades
High-temperature nickel alloy grades cover nickel alloy material grade types from commercially pure nickel, like 200/201 for caustics and electronics, Cu-Ni cupronickels for marine desalination, Ni-Cr/Mo corrosion alloys like 600/625/C-276 for chemical acids, precipitation-strengthened superalloys for turbine blades, to functional Ni-Ti shape-memory and Invar-type options for cryogenics and instruments. These deliver purity, seawater stability, acid/chloride resistance, extreme heat efficiency, and specialised properties.
Nickel Pipe
Nickel pipe is a tubular product made from nickel-dominant alloys or commercially pure nickel. This pipe is available in seamless forms. It is used in caustics, foods, and high-purity processes, as it resists rust due to its corrosion resistance. Nickel 200 (UNS N02200) is 99.6% Ni with low impurities for ductility and conductivity up to 600°F. Nickel 201 (UNS N02201) has the same purity but contains ≤0.02% carbon to prevent embrittlement over 600°F for cold forming. Both fulfil ASTM B161/B829 specifications in schedules 10-160 for chemical and electrical applications.
- Nickel 200 Pipe
Nickel 200 pipe (UNS N02200 or W.Nr. 2.4066) is a commercially pure (99.6%) wrought nickel with excellent mechanical qualities. This material is resistant to corrosion and works well in food processing equipment to maintain foods, synthetic fibers, and alkalis. High nickel concentration (≥99%) improves thermal, electrical, and magnetostrictive properties. Low impurities improve ductility.
- Nickel 201 Pipe
Nickel 201 pipe (UNS N02201 / DIN 2.4068) is equal to Nickel 200 but has a carbon content of less than 0.02%. This prevents embrittlement above 600°F (315°C) and enables cold forming. Key elements include pure nickel (99.6%), which ensures corrosion resistance. This low carbon improves formability during fabrication.
Monel Pipe
Monel pipe consists of nickel-copper alloy, which is known for its high corrosion resistance in seawater, acids and alkalis. Monel 400 pipe (UNS N04400) has a solid-solution base with 67% Ni and 28-33% Cu. This provides 550 MPa tensile strength in marine pumps and heat exchangers. Monel K500 pipe (UNS N05500) has Al/Ti for precipitation hardening, increasing strength to 1100 MPa (160 ksi).
- Monel 400 Pipe
Monel 400 pipe (UNS N04400 / 2.4360, NiCu30Fe) is a nickel-copper alloy with high strength. It resists seawater, hydrofluoric acid, sulfuric acid, and alkalies in marine engineering, valves, pumps, and heat exchangers. Key elements include approximately 67% Ni, which improves corrosion resistance, while Cu adds strength.
- Monel K500 Pipe
Monel K500 pipe (UNS N05500 / 2.4375) is a precipitation-hardenable nickel-copper alloy. It matches Monel 400’s corrosion resistance with higher strength, low permeability, and nonmagnetic traits to -150°F (-101°C). Suitable for pump shafts, oil-well equipment, springs, and marine engines. Key components comprise a Ni-Cu base, with Al and Ti enabling age-hardening.
Inconel Pipe
Inconel pipes are nickel-chromium superalloys (about 58–72% Ni, 14–23% Cr) designed for extreme corrosion, oxidation, and heat resistance up to 2000°F. Common grades include Inconel 600 (furnace service), 601 (oxidation scaling), 625 (chemical pitting), 800/Incoloy 800 (creep in petrochemicals), and 718 (aerospace turbines). Available as seamless or welded pipes to ASTM B167/B444, these are widely used in reactors, heat exchangers, and gas turbines.
- Inconel 600 Pipe
Inconel 600 pipe (UNS N06600 / 2.4816, NiCr15Fe) is a nickel-chromium-iron superalloy. It resists high-temperature oxidation, chloride stress-corrosion cracking, and caustic corrosion in furnaces, chemical processing, and nuclear engineering. Key elements: 72% Ni for base; 14-17% Cr for oxidation resistance.
- Inconel 601 Pipe
Inconel 601 pipe (UNS N06601 / 2.4851) is a nickel-chromium-iron alloy with aluminium. It excels in high-temperature oxidation and mechanical properties for furnaces, heat-treating gear, and gas-turbine parts. Key elements: Ni-Cr base; Al forms protective oxide scale.
- Inconel 625 Pipe
Inconel 625 pipe is a nickel-chromium-molybdenum-niobium alloy (UNS N06625 / 2.4856). Niobium and molybdenum stiffen the matrix for high strength without heat treatment, resisting pitting in chemical, aerospace, and nuclear uses. Key elements: Ni majority; Cr-Mo-Nb for corrosion and strength.
- Inconel 800 Pipe
Incoloy 800 pipes (800H / 800HT, UNS N08800 / 1.4876) are nickel-chromium-iron alloy pipes known for exceptional strength, corrosion resistance, and high-temperature stability. Nickel resists corrosion, chromium protects against oxidation, and iron maintains structural strength, while carbon in 800H/800HT improves creep resistance. This makes these pipes perfect for chemical, petrochemical, and power plant applications.
- Inconel 718 Pipe
Inconel 718 pipe (UNS N07718 / 2.4668) is precipitation-hardenable nickel-chromium alloy. It offers creep-rupture strength to 1300°F (700°C), weldability, and corrosion resistance in gas turbines, rocket motors, and nuclear reactors. Key elements: Ni-Cr base; Nb-Mo-Al-Ti for hardening.
Alloy Pipe
Alloy pipes are nickel-based superalloys (50–60% Ni with Mo, Cr, W) built for strong acid corrosion resistance at elevated temperatures, depending on grade. Common grades include C276, C22, C4, B2/B3, and C2000. Available in seamless or welded ASTM B622 forms, these pipes are used in chemical reactors, flue gas systems, and pharmaceutical plants.
- Alloy C276 Pipe
Alloy C276 pipe (UNS N10276 / 2.4819) is a high performance nickel-chromium-molybdenum alloy. It resists oxidising and reducing media in chemical reactors and flue gas systems. Key elements: Ni-Mo-Cr-W for broad corrosion protection.
- Alloy C22 Pipe
Alloy C22 pipe (UNS N06022 / 2.4602) is a nickel, chromium, molybdenum and tungsten superalloy. It provides protection against combined acids and chlorides for the production of chemicals and pharmaceuticals. Ni-Cr-Mo-W is a key elements that provides exceptional acid resistance.
- Alloy C4 Pipe
Alloy C4 pipe (UNS N06455 / 2.4610) is a wrought nickel, chromium, and molybdenum alloy. In chemical processing and pickling, it provides excellent temperature stability as well as acid corrosion resistance. Ni-Mo-Cr-Ti is a key element for thermal and corrosion strength.
- Alloy B2 Pipe
Alloy B2 pipe (UNS N10665 / 2.4617) is a solid solution strengthened (Ni-Mo) alloy. It excels in reducing acids like HCl in pickling and acid reactors. Key elements include Ni-Mo for reducing acid resistance.
- Alloy B3 Pipe
Alloy B3 pipe (UNS N10675) has better thermal stability than B2. It handles hydrochloric and strong reducing acids in high-purity plants. The alloy consists mainly of nickel and molybdenum (Ni-Mo), with controlled amounts of iron and chromium, along with other elements to improve overall performance.
- Alloy C2000 Pipe
Alloy C2000 pipe (UNS N06200 / 2.4675) is a nickel-chromium-molybdenum alloy with copper. It offers high corrosion resistance, particularly in sulfuric acid. Ni-Cr-Mo-Cu is a key element for oxidising and reducing media.
Advantages of Using High-Nickel Alloy Pipe Over Stainless Steel
High-nickel alloy offers better resistance to saltwater, acids and chlorides than conventional stainless steels. It maintains strength up to 1300°F (700°C) and offers better creep resistance. Certain high-nickel alloys exhibit lower thermal expansion than standard austenitic stainless steels, depending on composition, such as 304. High ductility enables easier processing, such as cutting. It ensures long-term durability, despite the increase in cost, and provides a net advantage of nickel alloy over stainless steel in harsh conditions and high temperatures exceeding 1000°F (538°C). The applications involve demanding chemicals; in contrast, stainless steel is sufficient for less rigorous conditions.
Applications of High Nickel Alloy Pipes
High-nickel alloy pipe is used where heat, pressure, and corrosion would quickly damage standard metals. Its strength and stability make it reliable across demanding industrial systems.
Oil & Gas
Used in sour gas lines, separators, and downhole tubing. It handles high pressure, hydrogen sulfide and chloride attacks in deep wells and offshore service.
Chemical Processing
This is used for acid transfer, reactor lines, and alkali pipes. It is resistant to strong acids and bases, which can cause rapid metal loss.
Marine
Used in seawater intake and discharge systems. Exposure to saltwater prevents pitting and crevice corrosion.
Aerospace
Used in fuel lines and turbine support piping. It maintains strength under high heat and vibration.
Power Plants
Used in superheater piping and heat recovery units. It is capable of withstanding continuous temperature fluctuations and corrosive gases.
Pollution Control
Used in scrubbers and stack liners. It resists acidic condensates and flue gas corrosion.
Pharmaceutical & Food Processing
Used for high-purity transport lines. It prevents contamination and ensures sanitation.
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
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Frequently Asked Questions
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What are the common grades of high nickel alloy pipes?
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Are high nickel alloy pipes suitable for acidic environments?Yes. High-nickel alloy pipes are suitable for acidic environments due to their resistance to corrosion against sulfuric and hydrochloric acids.
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Are seamless and welded high nickel alloy pipes available?Yes. At Xintongda, we offer high-quality seamless high nickel alloy pipes only.