Alloy Steel Seamless Tubes Manufacturer in India
Alloy Steel Seamless Tubes Manufacturer in India
Sachiya Steel International is an experienced Alloy Steel Seamless Tubes Manufacturer in India, established in 2005 with 20+ years of experience in manufacturing, supplying, and exporting industrial tubes. We offer alloy steel seamless tubes in different grades, outside diameters, wall thicknesses, lengths, and specifications for heat exchangers, boilers, pressure systems, power plants, petrochemical units, oil & gas, and engineering applications.
We manufacture and supply tubes to applicable ASTM, ASME, EN, and other international standards, with inspection, testing, and material documentation available as required. Our quality systems include ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, with applicable PED 2014/68/EU and TÜV approvals. With established export capabilities, we support standard, bulk, and project requirements and supply customers across 85+ countries.
What Are Alloy Steel Seamless Tubes?
Alloy steel seamless tubes are tubular products made from alloy steel and formed without a welded seam. Alloying elements such as chromium, molybdenum, nickel, vanadium, and manganese are added to improve properties such as strength, heat resistance, toughness, and resistance to wear or corrosion. The seamless construction makes these tubes suitable for applications where reliable performance under pressure and temperature is important.
They are widely used in boilers, heat exchangers, power plants, oil & gas equipment, petrochemical systems, pressure vessels, and general engineering. Common grades include P5, P9, P11, P22, P91, P92, 16Mo3, and 4130. The appropriate grade and specification depend on the working temperature, pressure, fluid, tube dimensions, and applicable ASTM, ASME, or EN standard.
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Alloy Steel Seamless Tubes
High-quality alloy steel seamless tubes manufactured for demanding applications across oil & gas, petrochemical, chemical, power generation, engineering and construction industries. Available in multiple grades, sizes, wall thicknesses and manufacturing specifications.
Types of Alloy Steel Seamless Tubes
We supply Alloy Steel Seamless Tubes in different grades, manufacturing conditions, dimensions, and end finishes for heat, pressure, mechanical, and engineering applications. Our range covers tubes designed for boilers, heat exchangers, power plants, petrochemical equipment, and high-temperature systems.
- Chrome-Moly Seamless Tubes: P5, P9, P11, P22, and similar grades for elevated-temperature and pressure service.
- Grade 91 & Grade 92 Tubes: Modified 9Cr steels offering high strength and creep resistance in demanding power applications.
- Molybdenum Steel Tubes: 16Mo3 for pressure and boiler applications at elevated temperatures.
- Nickel Alloy Steel Tubes: Grades with nickel additions for improved toughness in low-temperature service.
- Heat Exchanger Tubes: Seamless tubes designed for efficient heat transfer in industrial equipment.
- Boiler Tubes: Suitable for steam generation and high-temperature boiler systems.
- Normalised Tubes: Heat-treated to improve grain structure and provide consistent mechanical properties.
- Heat-Treated Tubes: Normalised and tempered or quenched and tempered options for applications requiring specific strength and toughness.
Our Alloy Steel Seamless Tubes suppliers can provide different outside diameters, wall thicknesses, lengths, and finishes with inspection and material documentation according to project requirements.
A213 T11, T22, T91, A209 T1, 16Mo3 and 4130 Alloy Steel Seamless Tubes Manufacturers and Suppliers in India
We manufacture and supply A213 T11, T22, T91, A209 T1, 16Mo3, and 4130 Alloy Steel Seamless Tubes in India for boiler, heat exchanger, power, petrochemical, oil & gas, and engineering applications. We offer different outside diameters, wall thicknesses, lengths, and delivery conditions to match specific operating requirements. Standard sizes can be supplied subject to availability, while special sizes and requirements can be produced to order.
A213 T11 and T22 are widely used for boiler and superheater applications at elevated temperatures. A213 T91 offers higher strength and creep resistance for demanding power plant service, while A209 T1 suits boiler and heat exchanger applications. 16Mo3 works well for pressure equipment and elevated-temperature service, while 4130 provides high strength for mechanical and engineering applications. We supply these grades with required inspection, testing, heat-treatment details, and material documentation.
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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→Get Certified Alloy Steel Seamless Tubes at Competitive Factory Prices
Alloy Steel Seamless Tubes Specification
The table below lists the main specification of our Alloy Steel Seamless Tubes.
| Parameter | Detail |
|---|---|
| Product | Alloy Steel Seamless Tubes |
| Process | Billet piercing, then hot rolling or cold drawing |
| Main grades | A213 T5, T9, T11, T12, T22, T91, T92; A209 T1; EN 10216-2 16Mo3, 13CrMo4-5, 10CrMo9-10; A519 4130, 4140 |
| Tube standards | ASTM A213 / ASME SA213, ASTM A209, ASTM A519, EN 10216-2, EN 10297-1 |
| Size basis | Outside diameter and wall thickness in mm |
| Size reference | OD 19.05 to 114.3 mm in the chart, other sizes on request |
| Length | Random, fixed or cut length |
| Ends | Plain ends, cut square and deburred, or bevelled on request |
| Finish | Hot finished, cold drawn, pickled, oiled or varnished |
| Heat treatment | Annealed, normalised or tempered as the grade requires |
| Tests | Chemical analysis, tensile, flattening, flaring, hardness, hydrostatic or eddy current test |
| Certificate | EN 10204 3.1 with every order, 3.2 on request |
| Inspection | Third-party inspection on request |
Alloy Steel Seamless Tubes Standards and Specifications
Alloy Steel Seamless Tubes are ordered against a product standard, a general requirements standard and a certificate type. The table shows each one.
| Standard | What it covers | Where it applies |
|---|---|---|
| ASTM A213 / ASME SA213 | Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes | T5, T9, T11, T12, T22, T91, T92 |
| ASTM A209 | Seamless carbon-molybdenum boiler and superheater tubes | T1 |
| ASTM A519 | Seamless carbon and alloy steel mechanical tubing | 4130, 4140 |
| ASTM A450 | General requirements for carbon and low-alloy tubes | Tolerances and test rules |
| EN 10216-2 | Seamless tubes for pressure use with elevated-temperature properties | 16Mo3, 13CrMo4-5, 10CrMo9-10 |
| EN 10297-1 | Seamless tubes for mechanical and general engineering | 25CrMo4, 34CrMo4, 42CrMo4 |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Alloy Steel Seamless Tubes Material and Grades
The grade decides the temperature limit and the strength. The table shows the grades buyers request most.
| Grade | UNS | EN number (closest) | Typical use |
|---|---|---|---|
| A213 T5 | K41545 | 1.7362 (X12CrMo5) | Refinery heaters and sulphur-bearing lines |
| A213 T9 | K81590 | 1.7386 (X11CrMo9-1) | Heat exchangers needing oxidation resistance |
| A213 T11 | K11597 | 1.7335 (13CrMo4-5) | Boiler and superheater tubes |
| A213 T12 | K11562 | 1.7335 (13CrMo4-5) | Boiler tubes at moderate heat |
| A213 T22 | K21590 | 1.7380 (10CrMo9-10) | Power plant superheaters and reheaters |
| A213 T91 | K90901 | 1.4903 (X10CrMoVNb9-1) | Main steam and reheat tubes |
| A213 T92 | K92460 | 1.4901 (X10CrWMoVNb9-2) | Ultra-supercritical boiler tubes |
| A209 T1 | K11522 | 1.5415 (16Mo3) | Moderate-heat boiler tubes |
| AISI 4130 | G41300 | 1.7218 (25CrMo4) | Machined and structural tubing |
| AISI 4140 | G41400 | 1.7225 (42CrMo4) | Higher-strength sleeves and shafts |
What Is the Difference Between Alloy Steel Seamless Tubes and Alloy Steel Seamless Pipes?
The short answer: tubes are sized by outside diameter and wall, with tight tolerances, and they are built to carry heat or fit machine parts. Pipes are sized by nominal pipe size and schedule, and they are built to carry fluid. A tube can be made in the same steel as a pipe, but the way you order it, test it and measure it is different.
| Point | Alloy Steel Seamless Tubes | Alloy Steel Seamless Pipes |
|---|---|---|
| Sizing | OD and wall in mm or inches | NPS and schedule |
| Tolerances | Tight | Looser, set by pipe standard |
| Main job | Heat transfer, boilers, mechanical parts | Carrying fluid and gas in piping |
| Typical standard | ASTM A213, A209, A519 | ASTM A335 |
| Surface and finish | Often cold drawn, smooth | Usually hot finished |
| Testing | Flattening, flaring, hardness, eddy current or hydro | Hydro or non-destructive test, bend test |
| Typical size range | Small to medium diameters | Small to very large diameters |
| Best fit | Heat exchangers, boilers, machined parts | Plant piping and steam lines |
Alloy Steel Seamless Tubes Chemical Composition
Chemical composition decides heat resistance, creep strength and weldability. The first table covers the common chrome-moly grades under ASTM A213. Values are percentage by weight, maximum unless shown as a range.
| Grade | C | Mn | Si | Cr | Mo | P max | S max |
|---|---|---|---|---|---|---|---|
| T5 | 0.15 | 0.30–0.60 | 0.50 | 4.00–6.00 | 0.45–0.65 | 0.025 | 0.025 |
| T9 | 0.15 | 0.30–0.60 | 0.25–1.00 | 8.00–10.00 | 0.90–1.10 | 0.025 | 0.025 |
| T11 | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | 1.00–1.50 | 0.44–0.65 | 0.025 | 0.025 |
| T12 | 0.05–0.15 | 0.30–0.61 | 0.50 | 0.80–1.25 | 0.44–0.65 | 0.025 | 0.025 |
| T22 | 0.05–0.15 | 0.30–0.60 | 0.50 | 1.90–2.60 | 0.87–1.13 | 0.025 | 0.025 |
The second table covers the creep-strength grades, laid out by element.
| Element | T91 | T92 |
|---|---|---|
| Carbon (C) | 0.07–0.14 | 0.07–0.13 |
| Manganese (Mn) | 0.30–0.60 | 0.30–0.60 |
| Silicon (Si) | 0.20–0.50 | 0.50 max |
| Chromium (Cr) | 8.00–9.50 | 8.50–9.50 |
| Molybdenum (Mo) | 0.85–1.05 | 0.30–0.60 |
| Tungsten (W) | — | 1.50–2.00 |
| Vanadium (V) | 0.18–0.25 | 0.15–0.25 |
| Niobium (Nb) | 0.06–0.10 | 0.04–0.09 |
| Nitrogen (N) | 0.030–0.070 | 0.030–0.070 |
| Boron (B) | — | 0.001–0.006 |
| Nickel (Ni) max | 0.40 | 0.40 |
| Aluminium (Al) max | 0.02 | 0.02 |
| Phosphorus (P) max | 0.020 | 0.020 |
| Sulphur (S) max | 0.010 | 0.010 |
Alloy Steel Seamless Tubes Mechanical Properties
Mechanical properties show how strong and hard the tube is at room temperature. The table gives minimum values under ASTM A213.
| Grade | Tensile strength min (MPa) | Yield strength min (MPa) | Elongation min (%) | Hardness max |
|---|---|---|---|---|
| T5 | 415 | 205 | 30 | 163 HBW / 85 HRB |
| T9 | 415 | 205 | 30 | 163 HBW / 85 HRB |
| T11 | 415 | 205 | 30 | 163 HBW / 85 HRB |
| T12 | 415 | 205 | 30 | 163 HBW / 85 HRB |
| T22 | 415 | 205 | 30 | 163 HBW / 85 HRB |
| T91 | 585 | 415 | 20 | 250 HBW |
| T92 | 620 | 440 | 20 | 250 HBW |
For 16Mo3 under EN 10216-2, yield strength is 280 MPa minimum for walls up to 16 mm, tensile strength is 450–600 MPa and elongation is 22% minimum. For AISI 4130 and 4140, strength depends on the heat treatment you order.
Alloy Steel Seamless Tubes Size and Weight Chart
Weight depends on outside diameter and wall thickness. For carbon and low-alloy steel, we use this formula:
OD and wall are in mm. Example: a 50.8 mm OD tube with a 3 mm wall weighs (50.8 − 3) × 3 × 0.02466 = 3.54 kg/m. Multiply by length for total weight.
| OD (mm) | 2.0 mm wall (kg/m) | 3.0 mm wall (kg/m) | 4.0 mm wall (kg/m) |
|---|---|---|---|
| 19.05 | 0.84 | 1.19 | 1.48 |
| 25.4 | 1.15 | 1.66 | 2.11 |
| 31.75 | 1.47 | 2.13 | 2.74 |
| 38.1 | 1.78 | 2.60 | 3.36 |
| 44.5 | 2.10 | 3.07 | 3.99 |
| 50.8 | 2.41 | 3.54 | 4.62 |
| 63.5 | 3.03 | 4.48 | 5.87 |
| 76.2 | 3.66 | 5.42 | 7.12 |
| 88.9 | 4.29 | 6.35 | 8.37 |
| 101.6 | 4.91 | 7.29 | 9.63 |
| 114.3 | 5.54 | 8.23 | 10.88 |
Available Sizes, Dimensions and Tolerances
Alloy Steel Seamless Tubes are ordered by outside diameter, wall thickness and length. The chart above shows OD 19.05 to 114.3 mm, and other sizes can be quoted on request. Tolerances follow the product standard on your order. The tables below show typical limits for cold-finished tubes under ASTM A450, which A213 and A209 refer to.
| Outside diameter (mm) | OD tolerance (mm) |
|---|---|
| Under 25.4 | ±0.10 |
| 25.4 to 38.1 | ±0.15 |
| Over 38.1 to under 50.8 | ±0.20 |
| 50.8 to under 63.5 | ±0.25 |
| 63.5 to under 76.2 | ±0.30 |
| 76.2 to 101.6 | ±0.38 |
| Outside diameter (mm) | Wall tolerance (ordered by minimum wall) |
|---|---|
| Up to 38.1 | +20% / −0 |
| Over 38.1 | +22% / −0 |
Hot-finished tubes carry wider limits, so tell us if the fit matters on your job.
Alloy Steel Seamless Tubes Common Materials
As an Alloy Steel Seamless Tubes manufacturer, we supply grades for boiler, heat exchanger, pressure, power, petrochemical, oil & gas, and engineering applications. Our range includes chrome-moly, molybdenum, and low-alloy grades selected for strength and reliable performance at elevated temperatures.
ASTM A213 T11: Chromium-molybdenum steel for boilers, superheaters, and heat exchangers.
ASTM A213 T22: Higher chromium-molybdenum grade for elevated-temperature boiler and power applications.
ASTM A213 T91: Modified 9Cr-1Mo steel with vanadium and niobium for high-temperature service and creep resistance.
ASTM A209 T1: Carbon-molybdenum steel for boiler and heat exchanger tubes.
16Mo3 (1.5415): Molybdenum alloy steel for pressure equipment and elevated-temperature applications under European standards.
AISI 4130: Chrome-moly steel offering high strength for mechanical and engineering applications.
We supply these grades in different tube sizes, wall thicknesses, lengths, and heat-treatment conditions, with inspection and material documentation available according to project requirements.
Alloy Steel Seamless Tubes We Manufacture and Supply
We make Alloy Steel Seamless Tubes for four service groups, and the right group depends on temperature, pressure and use.
| Service group | Grades | Standard | Typical finish |
|---|---|---|---|
| Boiler and superheater tubes | T11, T12, T22, A209 T1 | ASTM A213, A209 | Hot finished or cold drawn |
| Heat exchanger and refinery tubes | T5, T9 | ASTM A213 | Cold drawn |
| Ultra-supercritical steam tubes | T91, T92 | ASTM A213 | Hot finished or cold drawn |
| Mechanical tubes | 4130, 4140 | ASTM A519, EN 10297-1 | Cold drawn |
Applications of Alloy Steel Seamless Tubes
- Power generation: Superheater, reheater and economiser tubes.
- Oil and gas refineries: Furnace tubes and heat exchanger bundles.
- Petrochemical and chemical plants: Reactor and process heater tubes.
- Fertiliser plants: High-temperature, high-pressure process lines.
- Marine: Boiler and heat exchanger tubes on ships and offshore units.
- Pharmaceutical plants: Steam and utility heat exchangers outside the product-contact zone.
- Construction and heavy engineering: Structural and mechanical tubing.
- OEM and machinery: Shafts, cylinders and sleeves in 4130 and 4140.
Why Choose Us as Your Alloy Steel Seamless Tubes Manufacturer in India?
We have been working with industrial pipes and tubes since 2005, giving us more than two decades of practical experience in manufacturing, sourcing, inspection, and export. Over the years, we have supplied alloy steel seamless tubes for boilers, heat exchangers, power plants, petrochemical units, oil & gas projects, and engineering applications. We handle different tube sizes, wall thicknesses, lengths, and grades, with the capacity to manage 100+ tons per month for regular, bulk, and project requirements. This experience helps us understand technical specifications, documentation needs, and delivery schedules from the start of an order.
Our focus stays on consistent quality and dependable supply. We operate with ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, along with applicable PED 2014/68/EU and TÜV approvals. Material certificates, inspection reports, testing, heat-treatment records, and traceability documents can be provided according to project requirements. With customers across 85+ countries, we have built the export experience needed to handle international packing, documentation, and shipping. This makes us a reliable Alloy Steel Seamless Tubes supplier in India for both repeat and project orders.
Countries We Export Alloy Steel Seamless Tubes To
We export Alloy Steel Seamless Tubes to customers across 85+ countries, supporting power, oil & gas, petrochemical, chemical, boiler, heat exchanger, and engineering applications. Our export team handles product documentation, inspection requirements, packing, and shipping arrangements for international orders. India’s broader seamless steel tube exports include major markets such as Germany, the United States, Italy, Spain, and Canada.
North America: United States, Canada, Mexico
Middle East: UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain
Europe: UK, Germany, France, Italy, Netherlands, Spain
Asia Pacific: Australia, Singapore, Malaysia, Indonesia, Thailand, Vietnam
Africa: South Africa, Egypt, Nigeria, Kenya, Algeria
South America: Brazil, Argentina, Chile, Peru, Colombia
Our Alloy Steel Seamless Tubes suppliers support regular, bulk, and project orders with required specifications, testing documents, material certificates, and export paperwork.
Alloy Steel Seamless Tubes FAQs
Common questions about alloy steel seamless tube grades, dimensions, heat treatment, testing, and supply.
Which grade of Alloy Steel Seamless Tubes should I choose for a boiler?
For most boilers, pick T11 or T22. For very hot, high-pressure steam where creep strength matters, move to T91 or T92. For moderate heat, A209 T1 can save cost.
How do I choose between T11 and T22?
Look at the metal temperature and the fluid. T22 holds strength to a higher temperature and resists hydrogen better, while T11 costs less for moderate heat.
Can Alloy Steel Seamless Tubes be used for high-pressure service?
Yes. With no weld seam, the wall carries pressure evenly. Your design code sets the allowable stress and the wall thickness for the temperature.
Is heat treatment needed after bending or welding?
Often yes. Chrome-moly tubes usually need preheat and post-weld heat treatment, and T91 and T92 need tighter control than T11 or T22. Follow your approved welding procedure.
How do I weld Alloy Steel Seamless Tubes on site?
Use a matching filler metal, a low-hydrogen process and preheat as the procedure sets out. Check the interpass temperature as well, especially on T91 and T92.
What tolerances apply to OD and wall?
The product standard sets them. The tables above show typical A450 limits for cold-finished tubes. Hot-finished tubes carry wider limits.
What sizes can I order?
The chart above shows OD 19.05 to 114.3 mm in 2, 3 and 4 mm walls. Other sizes and walls can be quoted on request.
How do I calculate the weight of an order?
Use Weight (kg/m) = (OD − Wall) × Wall × 0.02466, with OD and wall in mm. Multiply by length and number of tubes. Real weight varies slightly with wall tolerance.
What affects the price of Alloy Steel Seamless Tubes?
Grade is the biggest factor, since chromium, molybdenum and vanadium move the cost. Size, wall, finish, quantity, testing, inspection and freight also count.
Which certificates come with the tubes?
Each order carries an EN 10204 3.1 certificate showing chemistry and mechanical results. A 3.2 certificate and third-party inspection are available on request.
Is every tube tested before it ships?
ASTM A213 requires a hydrostatic test or a non-destructive electric test on each tube, along with flattening and flaring tests. Tell us your preferred test when you enquire.
Are you a manufacturer or a supplier of Alloy Steel Seamless Tubes?
We are both. We manufacture near Mumbai and supply ready stock of popular sizes from the same location, subject to availability.
Can I order U-bent or special-shape tubes?
Send us your drawing and we will confirm what can be done. Straight tubes in standard sizes are the easiest to supply quickly.