Nickel Alloy Heat Exchanger Tubes
High-performance nickel alloy tubes for heat exchangers operating under corrosive, high-temperature and demanding process conditions.
Available in Alloy 400, 600, 625, 800 / 800H, 825, C22 and C276, with straight, U-bend and customized long-length configurations according to project requirements.
- Wide Nickel Alloy Range — 400 · 600 · 625 · 800 · 825 · C22 · C276
- Special Tube Configurations — Straight · U-Bend · Long Length
- Inspection Support — PMI · ET · UT · Hydro · EN 10204 3.1 / 3.2
Nickel Alloy Range
400 · 600 · 625 · 800 · 825 · C22 · C276
Custom Requirements
OD · WT · Length · Average / Minimum WT
U-Bend Capability
Custom Straight-Leg Length & Bend Radius
Inspection Support
PMI · ET · UT · Hydro · TPI
Nickel Alloy Tubes for Demanding Heat Exchanger Service
Nickel alloys are selected for heat exchanger applications where operating conditions require greater corrosion resistance, temperature capability or material performance than conventional stainless steels can provide.
The nickel-alloy family covers materials designed for very different service conditions—from nickel-copper Alloy 400 and heat-resistant Alloy 600/800 families to highly corrosion-resistant Alloy 625, 825, C22 and C276. Material selection should therefore follow the actual process chemistry, temperature, pressure and project specification rather than treating “nickel alloy” as one interchangeable material group.
DLSS supports nickel alloy heat exchanger tube projects from material and standard review through tube supply, U-bending, heat treatment, inspection, documentation and delivery.
Corrosion-Resistant Alloys
Material options for aggressive process environments.
Temperature Capability
Alloys available for demanding thermal service.
Custom Tube Forms
Straight, U-bend and project-specific long lengths.
Material Verification
PMI, NDE and traceability support.
Nickel Alloy Grades We Supply
Select the alloy according to process chemistry, corrosion mechanism, temperature and project specification.
Alloy 400 / UNS N04400
Nickel-copper alloy for selected heat exchanger and seawater-related applications requiring good corrosion performance.
ASTM B165-26 currently covers UNS N04400 cold-worked seamless pipe and tube; Special Metals also identifies Alloy 400 as a long-established material for seawater-related engineering service.
Typical Applications
Process Equipment · Seawater-Related Service · Industrial Heat Transfer
Alloy 600 / UNS N06600
Nickel-chromium-iron alloy used where corrosion resistance and elevated-temperature performance are important.
ASTM B167-23 includes UNS N06600 seamless pipe and tube intended for general corrosion-resistant and heat-resistant applications.
Typical Applications
High-Temperature Equipment · Process Heat Exchangers · Industrial Thermal Systems
Alloy 625 / UNS N06625
High-strength nickel-chromium-molybdenum alloy for highly demanding corrosion environments.
Special Metals describes Alloy 625 as resistant to severely corrosive environments and particularly resistant to pitting and crevice corrosion; ASTM B444-23 is the active seamless pipe/tube specification covering N06625.
Typical Applications
Chemical Processing · Oil & Gas · Offshore Process Equipment · Severe Corrosion Service
Alloy 800 / 800H
Nickel-iron-chromium alloys for elevated-temperature process equipment.
ASTM B407-22 covers N08800, N08810 and related nickel-iron-chromium seamless pipe/tube grades; the standard notes N08810 and N08811 are normally used above 1100°F / 593°C where creep and rupture resistance is required.
Typical Applications
High-Temperature Heat Exchangers · Process Heaters · Thermal Equipment
Alloy 825 / UNS N08825
Nickel-iron-chromium-molybdenum-copper alloy for corrosive process service.
ASTM B423-22 covers N08825 seamless pipe and tube intended for general corrosive service and specifies hydrostatic and nondestructive electric testing requirements.
Typical Applications
Chemical Processing · Acid Service · Refinery Equipment · Process Heat Exchangers
Alloy C22 / UNS N06022
Highly alloyed nickel-chromium-molybdenum material for demanding corrosion environments.
UNS N06022 is included in the current ASTM B622-23 seamless nickel-alloy pipe/tube specification.
Typical Applications
Chemical Processing · Aggressive Process Media · Special Heat Exchangers
Alloy C276 / UNS N10276
Nickel-chromium-molybdenum alloy widely used in severe chemical process environments.
Haynes identifies C276 as having strong resistance to chloride stress-corrosion cracking, pitting and crevice attack, and lists heat exchangers among its typical chemical-process applications. N10276 is also included in ASTM B622-23.
Typical Applications
Chemical Processing · Acid Service · Pollution Control · Severe Corrosion Heat Exchangers
Available Nickel Alloy Tube Forms
Straight Nickel Alloy Heat Exchanger Tubes
Straight seamless or welded tubes, where permitted by the applicable specification, for heat exchanger and condenser applications.
Nickel Alloy U-Bend Tubes
Precision U-bend tubes manufactured according to customer drawing and project-specific dimensional requirements.
OD · WT · Straight-Leg Length · Bend Radius · Wall Thinning · Ovality
Long Length Nickel Alloy Tubes
Customized long-length tubes for heat exchanger bundles requiring specific project lengths.
Available length depends on alloy, OD, wall thickness, manufacturing route and transportation requirements.
Nickel Alloy Finned Tubes
Enhanced-surface nickel alloy tube requirements can be reviewed according to base material, fin geometry, manufacturing route and inspection specification.
Nickel Alloy Heat Exchanger Tube Specifications
| Specification | Available Options |
|---|---|
| Grades | 400 / 600 / 625 / 800 / 800H / 825 / C22 / C276 |
| Construction | Seamless / Welded |
| Outside Diameter | Standard & Customized |
| Wall Thickness | Average WT / Minimum WT |
| Length | Fixed / Random / Customized Long Length |
| Tube Form | Straight / U-Bend / Finned |
| Surface | Annealed / Descaled / Project Requirement |
| Heat Treatment | According to alloy and applicable specification |
| Inspection | PMI / ET / UT / Hydro / Dimensional / TPI |
| Documentation | MTC / EN 10204 3.1 / 3.2 / Inspection Reports |
Common Nickel Alloy Tube Standards
ASTM B163
Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
ASTM B165
Alloy 400 / UNS N04400Current B165-26 covers cold-worked nickel-copper N04400 seamless pipe and tube.
ASTM B167
Alloy 600 / UNS N06600B167-23 covers N06600 and other nickel-chromium-iron seamless pipe/tube grades.
ASTM B407
Alloy 800 / 800HB407-22 covers N08800, N08810 and related nickel-iron-chromium seamless pipe/tube materials.
ASTM B423
Alloy 825 / N08825B423-22 covers N08825 seamless pipe and tube.
ASTM B444
Alloy 625 / N06625B444-23 is the active specification for N06625 nickel-chromium-molybdenum-niobium pipe and tube.
ASTM B622
C22 / N06022 · C276 / N10276B622-23 currently includes N06022 and N10276 among the nickel and nickel-cobalt alloys covered for seamless pipe and tube.
Nickel Alloy Heat Exchanger Tube Applications
High-Temperature Process Equipment
Alloy 600 and 800-family materials for suitable elevated-temperature applications.
Refineries
Nickel alloy materials for selected corrosive and high-temperature heat-transfer service.
Oil, Gas & Petrochemical
Special-alloy tubes for demanding process and refinery heat exchangers.
Chemical Processing
Nickel-alloy tube options for heat exchangers handling aggressive process media.
Severe Corrosion Service
Alloy 625, C22 and C276 options for selected applications requiring higher localized-corrosion resistance; actual selection should follow process chemistry and corrosion assessment.
Testing, Inspection & Documentation
ET
Eddy Current Testing
UT
Ultrasonic Testing
PMI
Positive Material Identification
Hydro
Hydrostatic Testing
Dimensional Inspection
OD · WT · Length · Straightness
Documentation
Reports & Certificates EN 10204 3.1 / 3.2
Project Documentation Support
- EN 10204 3.1 / 3.2 Certificates
- MTC (Mill Test Certificate)
- PMI Report
- ET / UT Reports
- Dimensional Reports
- Packing List & More
Complete documentation for seamless approvals and traceability.
Why DLSS for Nickel Alloy Heat Exchanger Tubes?
Wide Nickel Alloy Range
Support for multiple nickel-copper, nickel-chromium and nickel-chromium-molybdenum alloy requirements.
Alloy-Specific Standard Review
The applicable tube standard is reviewed according to the actual alloy and project specification.
U-Bending & Custom Requirements
Special OD, WT, long-length and U-bend requirements can be evaluated project by project.
Material Verification & Traceability
PMI, heat-number control and project-specific inspection documentation.
Complex Project Support
Technical communication, inspection coordination, packing and international delivery.