Nickel Alloys Tubes
Tubes are hollow sections specified by exact outside diameter and wall thickness, with tighter tolerances than pipe. They're used for heat exchangers, boilers, instrumentation, hydraulics and mechanical parts, where precise dimensions and surface quality matter.
Choose a grade below for specifications, composition, sizes and weight charts.
Nickel Alloys tubes by grade
| Grade | Specification | Key characteristic | Typical use |
|---|---|---|---|
| Inconel 600 Tubes | ASTM B163 / B167 | ≥ 72% nickel: immune to chloride SCC | Furnace muffles, retorts and trays |
| Inconel 601 Tubes | ASTM B167 | Aluminium addition for adherent oxide scale | Radiant tubes and furnace muffles |
| Inconel 625 Tubes | ASTM B444 / B704 | High strength without age hardening | Seawater piping and offshore systems |
| Inconel 718 Tubes | AMS 5589 / 5590 | Age-hardenable: yield strength above 1,000 MPa | Aero-engine discs, shafts and casings |
| Incoloy 800 Tubes | ASTM B407 / B163 / B515 | Fe-Ni-Cr: bridges stainless and nickel alloys | Heat-exchanger and steam-generator tubing |
| Incoloy 800H Tubes | ASTM B407 / B515 | Carbon 0.05–0.10% for creep strength | Steam-methane reformer pigtails and manifolds |
| Incoloy 800HT Tubes | ASTM B407 / B515 | Al + Ti 0.85–1.20% for maximum creep strength | Reformer and cracking furnace components |
| Incoloy 825 Tubes | ASTM B423 / B163 / B704 | Resistant to sulphuric and phosphoric acids | Sour oil and gas piping and tubulars |
| Monel 400 Tubes | ASTM B165 / B163 | Ni-Cu alloy: excellent in seawater and brackish water | HF alkylation units in refineries |
| Hastelloy C22 Tubes | ASTM B622 / B626 | Resists both oxidising and reducing media | Pharmaceutical and fine-chemical reactors |
| Hastelloy C276 Tubes | ASTM B622 / B626 | About 16% Mo, 15.5% Cr, 3.7% W | Chemical reactors and heat exchangers |
| Nickel 200 Tubes | ASTM B161 / B163 | 99.0% min nickel | Caustic soda evaporators and piping |
| Nickel 201 Tubes | ASTM B161 / B163 | Carbon 0.02% max: no graphitisation | High-temperature caustic evaporators |
How nickel alloys tubes are made, sized and tested
How it's madeSeamless tubes are hot-extruded or pierced and then cold-drawn or pilgered to size. Welded tubes are formed from strip, welded (TIG/laser/HF), bead-worked and drawn or sized. Heat-exchanger and boiler tubes are annealed after final forming, and U-tubes are bent and stress-relieved as required.
- Size range
- OD 3 mm to about 127 mm (¼" to 5") typical, wall 0.5 mm to 12 mm; BWG or mm; straight lengths up to about 30 m, U-bent to drawing
- Finish
- Annealed & pickled, bright annealed (BA), polished (sanitary), cold-drawn
- Ends
- Plain square-cut, deburred; U-bends with stress-relieved bends on request
Testing & documents
- Eddy-current and/or ultrasonic testing on each tube
- Hydrostatic or pneumatic test
- Flattening, flaring and flange tests
- Grain size (H grades), IGC and hardness when specified
- Surface roughness (Ra) for sanitary and instrumentation tube
- EN 10204 3.1 certificate; 3.2 with third-party inspection
Frequently asked questions
What is the difference between a pipe and a tube?
Pipes are ordered by nominal size and schedule for carrying fluids. Tubes are ordered by exact OD and wall thickness, with tighter tolerances, for heat transfer, instrumentation and structural uses.
What is BWG?
Birmingham Wire Gauge, a traditional system for tube wall thickness. Higher numbers are thinner walls (for example 16 BWG = 1.65 mm).
Which nickel alloys grades are available as tubes?
Inconel 600, Inconel 601, Inconel 625, Inconel 718, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Monel 400, Hastelloy C22, Hastelloy C276, Nickel 200, Nickel 201.
Which specifications cover nickel alloys tubes?
ASTM B163, ASTM B167, ASTM B444, AMS 5589, ASTM B407, ASTM B423, ASTM B165, ASTM B622, depending on grade.
Need nickel alloys tubes?
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