01
Seamless Pipe (ASTM B444)
Hot-extruded and cold-sunk Inconel 625 product for high-pressure and sour service.
Request Availability →Inconel 625 Pipe and Tube — B444 / B705 / B704
UNS N06625 seamless and welded product to ASTM B444, B705, and B704 for downhole, seawater, heat-exchanger, and flue-gas duty.
Full Pipe and Tube Range
Seamless and welded product to ASTM B444, B705, and B704 quoted from one inquiry.
Sour-Service Documentation
NACE MR0175 aligned supply with chemistry and hardness records for downhole review.
Condition Choice
Grade 1 and Grade 2 deliveries matched to strength-led or creep-led service before production.
PRODUCT OVERVIEW
About Inconel 625 Pipe and Tube
Inconel 625 pipe and tube covers UNS N06625 / Werkstoff 2.4856, a nickel-chromium-molybdenum-niobium grade strengthened by solid-solution hardening. Seamless runs to ASTM B444, welded pipe to B705, and welded tube to B704. As a result, duty spans sour-gas tubing, seawater lines, and scrubbers.
Overall, buyers normally arrive here after comparing Grade 1 against Grade 2 for the service temperature. In addition, the full chemistry, standards, and grade logic sit on the Inconel 625 material page, while we cover bar and rod and plate and sheet supply on their own form pages.
PRODUCT FEATURES
Key Features of Inconel 625 Pipe and Tube
UNS N06625 seamless pipe and tube is supplied to ASTM B444 / ASME SB444, welded pipe to ASTM B705, and welded tube to ASTM B704. Sizes run from exchanger tubing to large FGD pipe, with both grades and EN 10204 3.1 certificates. NACE MR0175 aligned documentation supports downhole and sour-gas review, with seamless, welded, and fitting supply quoted from one inquiry.
Inconel 625
Seamless and Welded Coverage
In addition, we quote extruded seamless product and GTAW-welded tube under the same specification review.
01
Sour-Gas Suitability
Additionally, chemistry and hardness control support NACE MR0175 / ISO 15156 qualification for downhole service.
02
Seawater Line Integrity
Pitting and crevice resistance holds through chlorinated, stagnant, and low-flow seawater duty.
03
High-Temperature Stability
Welded FGD pipe and aerospace ducting keep their properties toward 980 °C.
04
Grade 1 and Grade 2 Choice
Moreover, we select annealed and solution-annealed conditions against service temperature, not habit.
05
Weldability of the Product Itself
Moreover, spool welding and field butt welds proceed without preheat or mandatory post-weld treatment.
06
Eddy-Current Tested Tubing
Specifically, we test heat-exchanger tube to the agreed acceptance level before packing.
07
WHY CHOOSE US
Why Choose Inconel 625
First, ordering pipe through Southerly Alloy puts the specification check before the quotation. We confirm standard, grade, size, and testing against your line conditions first. Then, production runs with the partner mill responsible for melting and forming, and the certificate names the producing heat.
01
Application-First Review
Service temperature, medium, and code jurisdiction decide seamless versus welded before price does.
02
Mill-Linked Traceability
Every length carries heat-number documentation back through the producing plant.
03
Testing to Order
Therefore, we scope eddy current, hydrostatic, UT, and PMI to the purchase line, not sold as extras.
04
Project-Ready Export
In addition, we prepare bundling, beveling, and shipping documents for site delivery schedules.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Seamless and welded routes run separately, and the ordered standard fixes the route. Above all, B444 product is never substituted with welded stock. Then, we inspect each stage, and the final release matches the purchase specification with full heat traceability.
01
Billet and Strip Preparation
We verify barstock billets for seamless runs and matched UNS N06625 strip for welded runs against the required chemistry.
02
Hot Extrusion or Piercing
We pierce and extrude heated billets to hollows for seamless pipe and tube.
03
Cold Sinking or Rolling
Hollows are sunk or rolled to the ordered OD and wall with intermediate anneals.
04
Welded Forming
Strip is roll-formed and GTAW welded for B704 tube and B705 pipe, with the weld bead processed as specified.
05
Solution Heat Treatment
We run Grade 1 annealing and Grade 2 solution annealing to the temperature minimums of the ordered grade.
06
Pickling and Finishing
Scale removal, sizing, and cutting deliver the specified surface and end condition.
07
Final Testing
Finally, we complete hydrostatic, eddy-current, tensile, and hardness checks before we issue documentation.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Inconel 625 pipe and tube supply covers heat-exchanger tube, seamless line pipe, and large-diameter welded pipe. In addition, Grade 1 and Grade 2 conditions are both carried. Finally, we confirm wall thickness, end finish, and length against the purchase order before we schedule production.
20,000+ m²
Production Area
Partner workshops for extrusion, forming, and finishing under coordinated scheduling.
50+
Processing Machines
Piercing, rolling, welding, and straightening equipment across the tube routes.
600 Tons
Monthly Output
Nickel alloy tubular product across standard and custom dimensions.
30+
Technical Engineers
Specification, welding, and inspection support from inquiry to release.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
We release every Inconel 625 pipe and tube lot against the ordered standard. We check chemistry, mechanicals, dimensions, and non-destructive testing under the ISO 9001 quality system. EN 10204 3.1 documentation is standard, with sour-service records compiled where the project requires them.
01
Chemical Analysis
Specifically, we check spectrometer results against the UNS N06625 window before we cut any length.
02
Mechanical Testing
Tensile, yield, elongation, and hardness confirm the ordered grade condition.
03
NDT Scope
Moreover, we run eddy current, hydrostatic, and UT testing to the acceptance level written in the order.
04
Documentation
EN 10204 3.1 mill test certificates with heat-number traceability on every shipment.
PRODUCT FORMS
Available Product Forms
Inconel 625 tubular supply is split by manufacturing route, and each route carries its own ASTM specification and size window.
02
Seamless Tube (ASTM B444)
Precision Inconel 625 tube for heat exchangers and instrumentation lines.
Request Availability →
03
Welded Pipe (ASTM B705)
Longitudinally welded Inconel 625 product for large-diameter FGD and seawater lines.
Request Availability →
04
Welded Tube (ASTM B704)
GTAW-welded Inconel 625 tube for condensers and heat-exchanger bundles.
Request Availability →
05
Pipe Fittings (ASTM B366)
Elbows, tees, and reducers matched to the pipe standard and schedule.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Tubular duty is where the grade earns its keep — pressure, temperature, and corrosive media arrive together. Therefore, wall thickness carries the design. The applications below account for most inquiries.
Discuss Your Application →
01
Downhole and Sour-Gas Tubing
B444 seamless tubing for wells where H2S and chlorides rule out standard grades.
02
Heat Exchanger Bundles
B704 welded tube handling sulfuric, nitric, and mixed-acid shells.
03
Seawater Cooling Lines
Firewater, ballast, and cooling circuits where pitting ends thinner-walled alloys.
04
Flue Gas Desulfurization
Large-diameter B705 pipe for scrubber ductwork in wet chloride-laden gas.
05
Aerospace Ducting
Thin-wall welded tube for exhaust and thrust-reverser systems near 980 °C.
06
Nuclear Steam Systems
High-temperature water tubing with rigorous NDE acceptance.
07
Chemical Reactor Piping
Transfer lines and reactor circuits in oxidizing and reducing acids.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The chemistry window below is common to B444, B705, and B704 product for UNS N06625. However, the governing purchase specification takes precedence for acceptance of each tubular grade.
| Element | Content |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0–23.0% |
| Molybdenum (Mo) | 8.0–10.0% |
| Niobium + Tantalum (Nb + Ta) | 3.15–4.15% |
| Iron (Fe) | 5.00% max. |
| Cobalt (Co) | 1.00% max. |
| Carbon (C) | 0.10% max. |
| Manganese (Mn) | 0.50% max. |
| Silicon (Si) | 0.50% max. |
| Phosphorus (P) | 0.015% max. |
| Sulfur (S) | 0.015% max. |
| Aluminum (Al) | 0.40% max. |
| Titanium (Ti) | 0.40% max. |
Mechanical Properties
Minimum room-temperature tensile values are identical across the three tubular standards at each grade. First, we anneal Grade 1 at 871 °C (1600 °F) minimum. By contrast, Grade 2 is solution annealed at 1093 °C (2000 °F) minimum for creep-limited duty.
| Product Form | Standard | Condition / Grade | Tensile Strength | Yield Strength, 0.2% Offset | Elongation |
|---|---|---|---|---|---|
| Seamless pipe and tube | ASTM B444 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Seamless pipe and tube | ASTM B444 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Welded pipe | ASTM B705 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Welded pipe | ASTM B705 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Welded tube | ASTM B704 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Welded tube | ASTM B704 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
Grade 2 carries lower room-temperature minimums because the higher solution-annealing temperature coarsens the grain in exchange for creep resistance. Therefore, the ordered grade and standard govern final acceptance.
Physical Properties
| Property | Value |
|---|---|
| Alloy | Inconel 625 |
| UNS | N06625 |
| Werkstoff | 2.4856 |
| Density | Approx. 8.44 g/cm³ |
| Melting Range | Approx. 1290–1350°C |
| Elastic Modulus | Approx. 205 GPa (annealed) |
| Thermal Conductivity | Approx. 9.8 W/m·°C at 20 °C |
| Expansion Coefficient | 12.8 µm/m·°C (20–100 °C) |
| PREN | Approx. 50–52 |
| Alloy Type | Nickel-chromium-molybdenum |
Standards
| Standard | Product / Application |
|---|---|
| ASTM B444 | Seamless pipe and tube (Grade 1 / Grade 2) |
| ASTM B705 | Welded pipe |
| ASTM B704 | Welded tube |
| ASTM B366 | Wrought fittings matched to the pipe standard |
| ASME SB444 / SB705 / SB704 | Counterparts for boiler and pressure-code work |
| SAE AMS 5581 | Seamless tube and hydraulic tubing |
| DIN 17751 | Nickel alloy pipe and tube, W.Nr. 2.4856 |
| NACE MR0175 / ISO 15156 | Sour-service qualification (cited for reference) |
| VdTÜV 499 | Pressure equipment approval (Europe) |
ASTM publishes the governing documents at ASTM International, and ASME counterparts apply once the line falls under code jurisdiction. Additionally, you should verify sour-service qualification against the current NACE MR0175 / ISO 15156 edition for each project.
Dimensions
| Product Form | Typical Supply Range | Length |
|---|---|---|
| Seamless pipe | OD 6–219 mm, SCH 5 to SCH 80 and custom wall | Single Random, Double Random or Custom |
| Welded pipe | OD up to 1219 mm, SCH 5 to SCH XXS | Single Random, Double Random or Custom |
| Seamless tube | OD 6–50 mm, precision wall | Custom cut lengths |
| Welded tube | OD 6–50 mm for exchanger duty, custom wall | Custom cut lengths |
| Pipe fittings | Matched to pipe OD and schedule | — |
Overall, we quote sizes outside the listed windows against billet and strip availability. Therefore, state OD, wall or schedule, length, and end condition in the inquiry for an accurate route and price.
Surface Finishes
| Surface Condition | Typical Characteristics / Applications |
|---|---|
| Annealed & Pickled | Standard delivered condition for line pipe and exchanger tube |
| Bright Annealed | Smooth, scale-free bore and OD for instrumentation and clean service |
| Mill Finish | As-produced surface for spool fabrication and further machining |
| Polished Bore | Reduced roughness where flow or cleanliness demands it |
| Beveled End | Weld-preparation beveling to the agreed standard for butt welds |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
Most inquiries move from specification review to shipment in two to four weeks. However, seamless product sits at the longer end. The steps below keep the route and grade aligned with your line conditions before we fix the price.
1
Send Your Inquiry
State OD, wall or schedule, length, quantity, and the medium and temperature the line carries.
2
Select the Standard
B444 seamless, B705 welded pipe, or B704 welded tube, with ASME counterparts where code applies.
3
Confirm the Grade
Grade 1 for strength-led duty, Grade 2 for creep-led service above about 593 °C.
4
Review the Quotation
Pricing reflects route, testing scope, documentation, and Incoterm.
5
Production and Inspection
The plant manufactures and NDT-tests the order to the agreed acceptance level.
6
Shipment and Documentation
Finally, delivery arrives with EN 10204 3.1 certificates and export paperwork.
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which ASTM specification applies to each Inconel 625 tubular form?
ASTM B444 covers seamless pipe and tube, B705 welded pipe, and B704 welded tube. In other words, the three are not interchangeable — the ordered standard fixes the route.
How do Grade 1 and Grade 2 pipe differ?
Grade 1 takes an 871 °C (1600 °F) minimum anneal and carries higher room-temperature minimums. By contrast, Grade 2 is solution annealed at 1093 °C (2000 °F) minimum for creep-limited service above about 593 °C.
Is Inconel 625 pipe suitable for sour service?
Yes. The grade chemistry supports NACE MR0175 / ISO 15156 qualification. As a result, sour-service orders receive chemistry, hardness, and traceability records compiled for review.
Can Inconel 625 pipe be field welded?
Yes. Spool and butt welds use ERNiCrMo-3 filler without preheat. Moreover, post-weld heat treatment is generally not required for the grade.
How is Inconel 625 pipe priced?
We typically price Inconel 625 pipe by weight (kg). The final price depends on the nickel surcharge, pipe dimensions, manufacturing route, testing scope, quantity, and required delivery terms. We state the applicable Incoterm on every quotation.
What is your MOQ for Inconel 625 pipe?
Single-length orders are available for stocked OD and wall combinations.
What are your trade terms for Inconel 625 pipe?
We quote FOB as standard, with EXW, CIF, and DAP available against confirmed destinations.
What is the lead time for Inconel 625 pipe and tube?
Stocked sizes ship in 7-15 days. Meanwhile, we schedule production lengths against mill availability.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes — 3.1 mill test certificates are standard on every delivery. Moreover, we can arrange 3.2 certification with third-party endorsement on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the OD, wall or schedule, standard, grade, and length. In return, the quotation comes back with route, testing scope, Incoterm, and lead time. Additionally, you can attach line-condition details such as medium and temperature for grade confirmation.
