NICKEL-ALLOY TUBES FOR CORROSIVE & HIGH-TEMPERATURE SERVICE
Nickel Alloy Tubes
Grade- and specification-controlled sourcing for seamless, welded, straight and U-bent nickel-alloy tubing.
MNK-G.S.A coordinates nickel-alloy tube sourcing by exact UNS or approved material designation, product standard, seamless or welded route, outside diameter, wall, length, condition, testing, inspection documents and destination.
A Trade Name Is Not a Complete Tube Specification
A nickel-alloy family name must be converted into an exact UNS or approved European material designation and paired with the correct tube standard. Process medium, pressure, temperature, fabrication route and equipment code determine whether a heat-exchanger, general tube or pipe specification applies.
Material Definition and Supply Scope
Alloy 600 / 690 Families
Nickel–chromium–iron tube families such as UNS N06600 and N06690 sourced by exact grade, condition, product standard and service requirements.
Alloy 625 Family
UNS N06625 seamless pipe and tube sourced under the applicable ASTM B444 grade and heat-treatment condition, or another explicitly approved product specification.
Alloy 825 Family
UNS N08825 tube and pipe sourced by exact product standard, specified heat-treatment condition, dimensions, testing and required corrosion documentation.
Ni–Cr–Mo Families
Hastelloy-type and other nickel–chromium–molybdenum tube families sourced by UNS designation and the correct seamless or welded product specification.
Heat-Exchanger Tubes
Straight and U-bent condenser or heat-exchanger tubing supplied by OD, minimum or average wall, length schedule, bend geometry, end condition and test plan.
Process and Custom Tubing
Seamless or welded tubes for process, pressure, instrumentation and fabricated assemblies, with the distinction between tube and pipe maintained.
Typical Global Manufacturing Capability
Heat-Exchanger Portfolio
Alleima publishes a heat-exchanger tube outside-diameter range of 12–40 mm across its stainless-steel and nickel-alloy programme. Availability depends on the exact grade and dimensions.
Straight Lengths
Alleima publishes straight lengths up to 30 m for selected grade, outside-diameter and wall combinations, as well as U-bent supply. Confirm the complete combination for the inquiry.
Broader Seamless Programme
Tubacex lists 19–250 mm OD for its Spanish stainless and nickel-alloy programme, 12–88.9 mm for heat-exchanger tubes, and 6–250 mm for the Austrian stainless programme. These are separate scopes, not one nickel-alloy range.
ASTM B163 Scope
ASTM B163-26a covers seamless nickel and nickel-alloy condenser and heat-exchanger tubes with outside diameter ≤76.2 mm, subject to its wall limits. The SI value is informative; the standard uses inch-pound units as governing values.
Wall and Length
Wall thickness, maximum straight length, U-bend geometry and tolerances depend on alloy, route and standard. They are confirmed as one complete dimensional requirement.
No Combined Maximum
The smallest heat-exchanger OD and the largest seamless programme OD do not establish one universal stock or manufacturing range for every nickel alloy.
Standards and Documentation
ASTM B163-26a
Current specification for seamless nickel and nickel-alloy condenser and heat-exchanger tubes, covering outside diameter with average or minimum wall.
ASTM B444-23
Current specification for cold-worked seamless pipe and tube in defined nickel–chromium–molybdenum–niobium and nickel–chromium–molybdenum–silicon alloys, including UNS N06625 within its scope.
ASTM B167-23 / B423-22
B167 and B423 cover specified Ni-Cr-Fe and Ni-Fe-Cr-Mo-Cu seamless pipe and tube families, respectively. Confirm the exact UNS, condition and agreed edition for the quotation.
ASTM B622-26 and B626-26
B622 covers seamless nickel and nickel-cobalt alloy pipe and tube; B626 covers welded tube. Confirm the listed UNS and product form. The two manufacturing routes are not interchangeable.
EN 10204:2004
Inspection-document type, including 3.1 or 3.2 where available, is specified with chemistry, heat treatment, mechanical, dimensional, NDE and traceability requirements.
ISO 6207 Is Withdrawn
ISO 6207:1992 for seamless nickel and nickel-alloy tube is officially withdrawn and is not presented as a current procurement standard. A replacement requirement must be agreed explicitly.
Application Context
Heat Exchangers and Condensers
Straight and U-bent tubing for chemical, refinery, power and other thermal equipment under the applicable product and equipment code.
Corrosive Process Systems
Nickel-alloy tubing selected against process chemistry, concentration, temperature, pressure, velocity and contamination risk.
High-Temperature and Critical Service
Tube and pipe for furnaces, energy systems and engineered equipment where grade, condition, joining and inspection must be defined together.
Capability Note
Published dimensional ranges describe specialist manufacturing programmes, not guaranteed MNK stock or a universal mill range. Confirm alloy, diameter, wall thickness, length, condition, tolerances and quantity together for each inquiry.
Send Your Nickel Alloy Tubes Inquiry
Provide the material grade or composition, governing specification, product form, complete dimensions, quantity, inspection-document requirements and delivery destination.
ASTM Seamless Pipe and Tube Routes
The correct ASTM route depends on the exact alloy family, tube or pipe form, manufacturing condition, dimensions and intended service.
- ASTM B163-26a — Nickel-Alloy Heat-Exchanger Tubes
- ASTM B165-26 — Nickel-Copper Seamless Pipe and Tube
- ASTM B167-23 — Nickel-Alloy Seamless Pipe and Tube
- ASTM B407-22 — Nickel-Iron-Chromium Seamless Pipe and Tube
- ASTM B423-22 — Nickel-Alloy Seamless Pipe and Tube
- ASTM B444-23 — Nickel-Alloy Seamless Pipe and Tube
- ASTM B622-26: Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
ASTM Welded Pipe and Tube Routes
Welded pipe and welded tube use different product standards and different common-requirements documents; form, alloy and condition must be fixed before quotation.
- ASTM B619/B619M-19(2023) — Welded Nickel-Alloy Pipe
- ASTM B626-26 — Welded Nickel and Nickel-Cobalt Alloy Tube
- ASTM B704-23 — Welded Nickel-Alloy Tubes
- ASTM B705-24 — Nickel-Alloy Welded Pipe
- ASTM B751-21 — General Requirements for Welded Nickel-Alloy Tube
- ASTM B775/B775M-22 — General Requirements for Welded Nickel-Alloy Pipe
Welded Nickel-Alloy Pipe and Tube ASTM References
Related procurement references for welded nickel-alloy pipe and tube specifications. Confirm the agreed edition for the order:
Specialty and High-Strength Nickel-Alloy Tubular References
Related references for specialty and high-strength nickel-alloy tubular specifications. Confirm the agreed edition for the order:
Related ASTM Seamless Nickel-Alloy Tubular Specifications
Use the current product specification, exact UNS designation and authorised edition when preparing an inquiry.
Specialty Welded and Enhanced-Surface Tube Routes
Use the current product specification, exact UNS designation and authorised edition when preparing an inquiry.
Sources and Review Scope
Checked on 4 October 2026: manufacturer dimensions and the public scope/status of the standards listed below. Full licensed standards and every linked library page were not re-audited in this review. Published programmes do not guarantee stock or all combinations.
- Alleima: heat-exchanger tube programme
- Tubacex: plant programmes (PDF page 2) and heat-exchanger tubes (page 3)
- ASTM B163-26a
- ASTM B444-23
- ASTM B167-23
- ASTM B423-22
- ASTM B622-26
- ASTM B626-26
- EN 10204:2004
- ISO 6207:1992
Source review: