Nickel Alloy Boiler Tubes Manufacturer in India
Nickel Alloy Boiler Tubes Manufacturer in India
Sachiya Steel International is a leading Nickel Alloy Boiler Tubes Manufacturer in India, supplying tubes for demanding boiler and heat-recovery applications since 2005. Our facility near Mumbai and export office in Mumbai support requirements for superheaters, reheaters, waste heat boilers, and other high-temperature equipment used in power generation, petrochemical, fertiliser, waste-to-energy, and process industries.
We supply nickel alloy boiler tubes in grades such as UNS N06600, N06625, N08810, and N08825, with different sizes, outside diameters, wall thicknesses, and lengths based on project requirements. Nickel alloys offer useful resistance to high-temperature oxidation, scaling, corrosion, and thermal cycling where conventional materials may not be suitable. EN 10204 3.1 certification is supplied with every order, while 3.2 certification and third-party inspection are available on request. Our credentials include ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, PED 2014/68/EU, and TUV approvals. Popular sizes may be available from ready stock, subject to availability, and shipments are made to 85+ countries.
What Are Nickel Alloy Boiler Tubes?
Nickel Alloy Boiler Tubes are seamless or welded tubes made from nickel-based alloys and designed for boiler, heat-recovery, and high-temperature heat-transfer service. They combine good strength at elevated temperatures with resistance to oxidation, scaling, and corrosive gases, making them suitable where conventional carbon or low-alloy steel tubes may face faster degradation.
These tubes are commonly used in superheaters, reheaters, waste heat boilers, heat recovery systems, and high-temperature process equipment. Depending on the grade, nickel alloy tubes can withstand demanding environments containing steam, sulphur compounds, chlorides, and other corrosive elements.
Common grades include Nickel 200, Nickel 201, Inconel 600, Inconel 625, Incoloy 800, Incoloy 800H, Incoloy 800HT, and Incoloy 825. The correct grade depends on operating temperature, pressure, heat-transfer conditions, corrosion exposure, and the applicable material standard.
Nickel Alloy Boiler Tubes
High-quality nickel alloy boiler tubes manufactured for demanding applications across chemical, petrochemical, power generation, oil and gas, marine, construction and engineering industries. Available in multiple grades, sizes, wall thicknesses and manufacturing specifications.
Types of Nickel Alloy Boiler Tubes
Our range of Nickel Alloy Boiler Tubes covers different alloys, boiler sections and finishes for power and process boilers. We supply the following types:
- Inconel Boiler Tubes: Inconel 600, 601, 625 and 690 for hot, corrosive flue gas and high-temperature oxidation.
- Incoloy Boiler Tubes: Incoloy 800, 800H, 800HT and 825 for creep service and acid dew-point conditions.
- Monel Boiler Tubes: Monel 400 for feedwater heaters and seawater-cooled units.
- Hastelloy Boiler Tubes: C276 and C22 for waste heat boilers and scrubber-side heat recovery.
- Superheater Tubes: tubes that heat saturated steam to final temperature.
- Reheater Tubes: tubes that reheat steam between turbine stages.
- Feedwater Heater Tubes: tubes in high-pressure heaters on the feedwater line.
- Waste Heat Boiler Tubes: tubes that recover heat from hot process gas.
- Cold-Drawn Seamless Tubes: close dimensional control and a smooth surface.
- Solution-Annealed Tubes: heat treated to restore corrosion and creep properties.
- Coarse-Grain Tubes: 800H and 800HT supplied with a controlled coarse grain size for creep strength.
- Pickled Tubes: annealed and pickled for a clean, scale-free surface.
As a Nickel Alloy Boiler Tubes Manufacturer, we supply these types in the required alloy, OD, wall and length.
Inconel, Incoloy, Monel and Hastelloy Nickel Alloy Boiler Tubes Manufacturers and Suppliers in India
We manufacture and supply Nickel Alloy Boiler Tubes in Inconel, Incoloy, Monel and Hastelloy grades. The right grade depends on the metal temperature, the steam pressure and what is in the flue gas.
- UNS N08810 / N08811 (Incoloy 800H / 800HT): the usual picks for creep service in superheaters and reheaters, with a controlled coarse grain.
- UNS N08800 (Incoloy 800): iron-rich alloy for steam generators and process heaters at moderate temperature.
- UNS N06600 (Inconel 600): nickel-chromium-iron alloy for chloride-bearing gas and high-temperature service.
- UNS N06601 (Inconel 601): aluminium-bearing alloy for strong scale resistance in hot gas.
- UNS N06690 (Inconel 690): high-chromium alloy for sulphur- and ash-laden flue gas and steam service.
- UNS N06625 (Inconel 625): high strength with strong resistance to pitting and corrosion in aggressive condensates.
- UNS N08825 (Incoloy 825): copper and molybdenum alloy for acid dew-point and economiser duty.
- UNS N04400 (Monel 400): nickel-copper alloy for feedwater heaters and seawater-cooled condensing.
- UNS N10276 / N06022 (Hastelloy C276 / C22): for waste heat recovery in corrosive gas and flue gas desulphurisation.
These grades are available in different ODs, walls and lengths according to the required specification.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
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Copper Nickel Alloy Pipe
→Get Certified Nickel Alloy Boiler Tubes at Competitive Factory Prices
Nickel Alloy Boiler Tubes Specification
The table sets out the working specification.
| Item | Detail |
|---|---|
| Product | Nickel Alloy Boiler Tubes |
| Process | Seamless, pierced and cold drawn, then heat treated |
| Grades | Monel 400, Inconel 600, 601, 625, 690, Incoloy 800, 800H, 800HT, 825, Hastelloy C276, C22 |
| Tube standards | ASTM B163, B167, B407, B423, B444, B622 / ASME SB equivalents |
| European grades | EN 10216-5 for 1.4876, 1.4958 and 1.4959 |
| General requirements | ASTM B829 |
| Size reference | OD 38.1 to 88.9 mm in the tables, other sizes on request |
| Wall thickness | Minimum or average wall in mm, as per drawing |
| Length | Fixed, random or cut length to the boiler drawing |
| Ends | Plain, cut square and deburred |
| Heat treatment | Annealed or solution annealed; 800H and 800HT with grain size ASTM No. 5 or coarser |
| Surface | Pickled, or bright annealed on request |
| Tests | Chemical analysis, tensile, flattening, flaring, hydrostatic or eddy current test, grain size for 800H and 800HT |
| Certificate | EN 10204 3.1 with every order, 3.2 on request |
| Inspection | Third-party inspection on request |
Nickel Alloy Boiler Tubes Standards and Specifications
Boiler tubes are bought to an alloy standard, with the boiler design code and test methods behind it. The table links each one to its job.
| Standard | Scope | Where it applies |
|---|---|---|
| ASTM B163 / ASME SB-163 | Seamless nickel and nickel alloy condenser and heat-exchanger tube | Monel 400, Inconel 600, 601, 690, Incoloy 800, 800H, 800HT, 825 |
| ASTM B167 / ASME SB-167 | Seamless nickel-chromium-iron alloy pipe and tube | Inconel 600, 601, 690 |
| ASTM B407 / ASME SB-407 | Seamless nickel-iron-chromium alloy pipe and tube | Incoloy 800, 800H, 800HT |
| ASTM B423 / ASME SB-423 | Seamless nickel-iron-chromium-molybdenum-copper alloy pipe and tube | Incoloy 825 |
| ASTM B444 / ASME SB-444 | Seamless nickel-chromium-molybdenum-columbium alloy pipe and tube | Inconel 625 |
| ASTM B622 / ASME SB-622 | Seamless nickel and nickel-cobalt alloy pipe and tube | Hastelloy C276, C22 |
| ASTM B829 | General requirements for seamless nickel and nickel alloy pipe and tube | Tolerances and test rules |
| EN 10216-5 | Seamless stainless steel tubes for pressure purposes | European grades 1.4876, 1.4958, 1.4959 |
| ASME Section I | Rules for power boiler construction | Boiler design |
| ASME Section II, Part D | Allowable stress values by temperature | Wall thickness calculation |
| ASTM E213, E426 | Ultrasonic and eddy current examination of tubing | Non-destructive testing |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Nickel Alloy Boiler Tubes Material and Grades
Pick the grade by metal temperature, steam pressure and flue gas chemistry. The table lists the common grades with their UNS and EN numbers.
| Grade | UNS | EN number | Name | Standard | Typical use |
|---|---|---|---|---|---|
| Monel 400 | N04400 | 2.4360 | Nickel-copper | B163 | Feedwater heaters |
| Inconel 600 | N06600 | 2.4816 | Nickel-chromium-iron | B167, B163 | Hot, chloride-bearing gas |
| Inconel 601 | N06601 | 2.4851 | Nickel-chromium-aluminium | B167, B163 | High-temperature oxidation |
| Inconel 625 | N06625 | 2.4856 | Nickel-chromium-molybdenum | B444 | Aggressive condensate and gas |
| Inconel 690 | N06690 | 2.4642 | High-chromium nickel alloy | B167, B163 | Sulphur and ash-laden flue gas |
| Incoloy 800 | N08800 | 1.4876 | Nickel-iron-chromium | B407, B163 | Steam generators, heaters |
| Incoloy 800H | N08810 | 1.4958 | Nickel-iron-chromium | B407, B163 | Superheaters, creep service |
| Incoloy 800HT | N08811 | 1.4959 | Nickel-iron-chromium | B407, B163 | Higher-temperature creep service |
| Incoloy 825 | N08825 | 2.4858 | Nickel-iron-chromium-molybdenum-copper | B423, B163 | Economisers, acid dew-point duty |
| Hastelloy C276 | N10276 | 2.4819 | Nickel-molybdenum-chromium | B622 | Waste heat recovery, scrubbers |
| Hastelloy C22 | N06022 | 2.4602 | Nickel-chromium-molybdenum | B622 | Oxidising and reducing gas |
What Is the Difference Between Nickel Alloy Boiler Tubes and Stainless Steel Boiler Tubes?
The short answer: stainless steel boiler tubes (such as TP304H and TP347H) cost less and serve well up to moderate temperatures, while nickel alloy boiler tubes keep their strength and resist corrosion at higher temperature and in dirtier gas. Use stainless where it lasts, and step up to nickel alloy when creep, scaling or chloride and sulphur attack shorten tube life.
| Point | Nickel Alloy Boiler Tubes | Stainless Steel Boiler Tubes |
|---|---|---|
| Base metal | Nickel, about 30–99% | Iron with 16–26% chromium |
| Creep strength | High; 800H and 800HT are built for it | Good at moderate temperatures |
| Oxidation | Tight, stable oxide skin | Good, but scale can flake in cycling |
| Chloride and sulphur attack | Strong resistance | Weaker; stress cracking can occur |
| Density | 7.94–8.89 g/cm³ | About 7.9–8.0 g/cm³ |
| Cost | Higher | Lower |
| Common standards | ASTM B163, B167, B407 | ASTM A213 (TP304H, TP347H) |
| Typical use | Superheaters, reheaters, waste heat boilers, severe flue gas | General boiler and power plant tubing |
Nickel Alloy Boiler Tubes Chemical Composition
Chemistry gives each alloy its creep strength and corrosion resistance. The tables show the ASTM limits, one element per row. Values are percentage by weight, maximum unless shown as a range or marked "min".
Monel and Inconel
| Element | Monel 400 | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 690 |
|---|---|---|---|---|---|
| Nickel (Ni) | 63.0 min | 72.0 min | 58.0–63.0 | 58.0 min | 58.0 min |
| Chromium (Cr) | — | 14.0–17.0 | 21.0–25.0 | 20.0–23.0 | 27.0–31.0 |
| Iron (Fe) | 2.5 | 6.0–10.0 | Balance | 5.0 | 7.0–11.0 |
| Molybdenum (Mo) | — | — | — | 8.0–10.0 | — |
| Niobium + Tantalum | — | — | — | 3.15–4.15 | — |
| Copper (Cu) | 28.0–34.0 | 0.50 | 1.0 | — | 0.50 |
| Aluminium (Al) | — | — | 1.0–1.7 | 0.40 | — |
| Titanium (Ti) | — | — | — | 0.40 | — |
| Cobalt (Co) | — | — | — | 1.0 | — |
| Carbon (C) | 0.30 | 0.15 | 0.10 | 0.10 | 0.05 |
| Manganese (Mn) | 2.0 | 1.0 | 1.0 | 0.50 | 0.50 |
| Silicon (Si) | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 |
| Sulphur (S) | 0.024 | 0.015 | 0.015 | 0.015 | 0.015 |
Incoloy
| Element | Incoloy 800 | Incoloy 800H | Incoloy 800HT | Incoloy 825 |
|---|---|---|---|---|
| Nickel (Ni) | 30.0–35.0 | 30.0–35.0 | 30.0–35.0 | 38.0–46.0 |
| Chromium (Cr) | 19.0–23.0 | 19.0–23.0 | 19.0–23.0 | 19.5–23.5 |
| Iron (Fe) | 39.5 min | 39.5 min | 39.5 min | 22.0 min |
| Molybdenum (Mo) | — | — | — | 2.5–3.5 |
| Copper (Cu) | 0.75 | 0.75 | 0.75 | 1.5–3.0 |
| Aluminium (Al) | 0.15–0.60 | 0.15–0.60 | 0.25–0.60 | 0.20 |
| Titanium (Ti) | 0.15–0.60 | 0.15–0.60 | 0.25–0.60 | 0.6–1.2 |
| Aluminium + Titanium | — | 0.30–1.20 | 0.85–1.20 | — |
| Carbon (C) | 0.10 | 0.05–0.10 | 0.06–0.10 | 0.05 |
| Manganese (Mn) | 1.5 | 1.5 | 1.5 | 1.0 |
| Silicon (Si) | 1.0 | 1.0 | 1.0 | 0.50 |
| Sulphur (S) | 0.015 | 0.015 | 0.015 | 0.03 |
Hastelloy
| Element | Hastelloy C276 | Hastelloy C22 |
|---|---|---|
| Nickel (Ni) | Balance | Balance |
| Chromium (Cr) | 14.5–16.5 | 20.0–22.5 |
| Molybdenum (Mo) | 15.0–17.0 | 12.5–14.5 |
| Iron (Fe) | 4.0–7.0 | 2.0–6.0 |
| Tungsten (W) | 3.0–4.5 | 2.5–3.5 |
| Cobalt (Co) | 2.5 | 2.5 |
| Vanadium (V) | 0.35 | 0.35 |
| Carbon (C) | 0.01 | 0.015 |
| Manganese (Mn) | 1.0 | 0.50 |
| Silicon (Si) | 0.08 | 0.08 |
| Phosphorus (P) | 0.04 | 0.02 |
| Sulphur (S) | 0.03 | 0.02 |
Nickel Alloy Boiler Tubes Mechanical Properties
Mechanical properties depend on the grade and the heat-treated condition. The tables give minimum values for annealed or solution annealed tube, with one property per row.
| Property | Monel 400 | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 690 |
|---|---|---|---|---|---|
| Tensile strength, MPa (ksi) | 485 (70) | 550 (80) | 550 (80) | 827 (120) | 586 (85) |
| Yield strength 0.2%, MPa (ksi) | 195 (28) | 240 (35) | 205 (30) | 414 (60) | 241 (35) |
| Elongation (%) | 35 | 30 | 30 | 30 | 30 |
| Property | Incoloy 800 | Incoloy 800H / 800HT | Incoloy 825 | Hastelloy C276 | Hastelloy C22 |
|---|---|---|---|---|---|
| Tensile strength, MPa (ksi) | 520 (75) | 450 (65) | 586 (85) | 690 (100) | 690 (100) |
| Yield strength 0.2%, MPa (ksi) | 205 (30) | 170 (25) | 241 (35) | 283 (41) | 310 (45) |
| Elongation (%) | 30 | 30 | 30 | 40 | 45 |
Nickel Alloy Boiler Tubes Size and Weight Chart
Weight depends on OD, wall thickness and alloy density. Inconel 625 has a density of about 8.44 g/cm³, so we use this formula:
OD and wall are in mm. Example: 50.8 mm OD × 4.0 mm wall is (50.8 − 4.0) × 4.0 × 0.02652 = 4.96 kg/m. Multiply by length for total weight. For other alloys, swap in the factor from the second table below.
| OD (mm) | OD (in) | Wall 3.2 mm (kg/m) | Wall 4.0 mm (kg/m) | Wall 5.0 mm (kg/m) | Wall 6.3 mm (kg/m) |
|---|---|---|---|---|---|
| 38.1 | 1-1/2" | 2.96 | 3.62 | 4.39 | 5.31 |
| 44.5 | 1-3/4" | 3.50 | 4.30 | 5.24 | 6.38 |
| 50.8 | 2" | 4.04 | 4.96 | 6.07 | 7.43 |
| 63.5 | 2-1/2" | 5.12 | 6.31 | 7.76 | 9.56 |
| 76.2 | 3" | 6.20 | 7.66 | 9.44 | 11.68 |
| 88.9 | 3-1/2" | 7.27 | 9.01 | 11.13 | 13.80 |
Alloy Weight Factors
| Alloy | Density (g/cm³) | Factor |
|---|---|---|
| Nickel alloys such as Hastelloy C276 | 8.89 | 0.02793 |
| Monel 400 | 8.80 | 0.02765 |
| Hastelloy C22 | 8.69 | 0.02730 |
| Inconel 600 | 8.47 | 0.02661 |
| Inconel 625 | 8.44 | 0.02652 |
| Inconel 690 | 8.19 | 0.02573 |
| Incoloy 825 | 8.14 | 0.02557 |
| Inconel 601 | 8.11 | 0.02548 |
| Incoloy 800 / 800H / 800HT | 7.94 | 0.02494 |
Available Sizes, Dimensions and Tolerances
Nickel Alloy Boiler Tubes are ordered by OD and wall thickness in mm, with the wall given as a minimum or an average wall. The tables cover OD 38.1 to 88.9 mm (1-1/2 to 3-1/2 in) in common walls from 3.2 to 6.3 mm. Other ODs, walls and lengths can be quoted on request, and lengths are cut to your boiler drawing. Confirm the wall against the design code and the allowable stress at your metal temperature.
| OD (mm) | OD (in) | Walls commonly ordered (mm) |
|---|---|---|
| 38.1 | 1-1/2" | 3.2, 4.0, 5.0 |
| 44.5 | 1-3/4" | 3.2, 4.0, 5.0, 6.3 |
| 50.8 | 2" | 3.2, 4.0, 5.0, 6.3 |
| 63.5 | 2-1/2" | 4.0, 5.0, 6.3 |
| 76.2 | 3" | 4.0, 5.0, 6.3 |
| 88.9 | 3-1/2" | 5.0, 6.3 |
Tolerances on OD, wall and length follow ASTM B829 and the product standard, and they differ for minimum wall and average wall ordering. Tell us if your drawing calls for closer limits.
Common Materials in Nickel Alloy Boiler Tubes
We manufacture and supply the commonly specified materials used in Nickel Alloy Boiler Tubes, with grades selected according to metal temperature, pressure and flue gas conditions.
UNS N08810 (1.4958): Incoloy 800H, with controlled carbon and coarse grain for creep strength. It is widely used for superheater and reheater tubing.
UNS N08811 (1.4959): Incoloy 800HT, with tighter carbon and aluminium-plus-titanium limits for higher-temperature creep service.
UNS N06600 (2.4816): Inconel 600, for hot, chloride-bearing flue gas.
UNS N06601 (2.4851): Inconel 601, with aluminium for strong scale resistance.
UNS N06690 (2.4642): Inconel 690, with about 30% chromium for sulphur and ash-laden gas.
UNS N06625 (2.4856): Inconel 625, for aggressive condensate and high-strength service.
UNS N08825 (2.4858): Incoloy 825, for economiser and acid dew-point duty.
UNS N04400 (2.4360): Monel 400, for feedwater heaters.
UNS N10276 (2.4819): Hastelloy C276, for waste heat recovery in corrosive gas.
These grades form part of our supply range as Nickel Alloy Boiler Tubes Suppliers, with different ODs, walls and lengths available according to the required specification.
Nickel Alloy Boiler Tubes We Manufacture and Supply
We make Nickel Alloy Boiler Tubes for the boiler sections below. The grade follows the metal temperature and the gas chemistry.
| Boiler section | Grades | Why this grade |
|---|---|---|
| Superheater and reheater | Incoloy 800H, 800HT | Creep strength at high metal temperature |
| Steam generator and process heater | Incoloy 800, Inconel 600 | Steady strength and oxidation resistance |
| Hot, scale-forming gas side | Inconel 601, 690 | Tight oxide skin, sulphur resistance |
| Economiser and acid dew-point zone | Incoloy 825, Inconel 625 | Resists sulphuric acid and chloride condensate |
| Feedwater heater | Monel 400, Inconel 625 | Handles feedwater chemistry and seawater cooling |
| Waste heat and flue gas recovery | Hastelloy C276, C22 | Resists wet, acidic corrosive gas |
Applications of Nickel Alloy Boiler Tubes
- Power generation: Superheaters, reheaters and feedwater heaters in utility boilers.
- Waste-to-energy plants: Tubes exposed to chloride-rich flue gas and ash.
- Pulp and paper: Recovery boiler and black liquor service.
- Petrochemical plants: Fired heaters and steam generation units.
- Fertiliser plants: Waste heat boilers on ammonia and acid lines.
- Refineries: Process steam boilers and heat recovery units.
- Steel and metal plants: Waste heat recovery from furnace gas.
- Biomass power plants: Boiler tubes in alkali-heavy fuel gas.
- Marine: Auxiliary and exhaust gas boilers.
Why Choose Us as Your Nickel Alloy Boiler Tubes Manufacturer in India?
We have been working in the pipes and tubes industry since 2005, which gives us close to two decades of experience with nickel alloys and high-temperature tubing. Our facility near Mumbai supports the manufacturing and supply of Inconel, Incoloy, Monel and Hastelloy tubes in different ODs, walls and lengths. Popular sizes can be available from ready stock, subject to availability. This experience makes us a dependable Nickel Alloy Boiler Tubes Supplier in India for power and process boiler projects.
Our quality and documentation practices support both domestic and international supply. EN 10204 3.1 certification is provided with every order, while 3.2 certification and third-party inspection can be arranged on request. We hold ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certifications, together with PED 2014/68/EU and TUV approvals. With an export office in Mumbai and supply reaching 85+ countries, we also