01
Seamless Pipe (ASTM B983)
First, hot-finished and cold-finished Inconel 718 product for high-pressure wells and wellhead lines.
Request Availability →Inconel 718 Pipe and Tube — B983 Seamless
UNS N07718 seamless pipe and tube to ASTM B983 and AMS 5589/5590 for downhole, aerospace, and high-pressure duty.
Seamless B983 Range
In short, precision tube through hot-finished heavy-wall pipe quoted under one ASTM B983 inquiry.
Aged or Solution-Treated
We match deliveries to fabrication plans or to full 1275 MPa (185 ksi) class strength.
Downhole Documentation
Specifically, chemistry, hardness, and traceability records compiled for NACE MR0175 and API 6A review.
PRODUCT OVERVIEW
About Inconel 718 Pipe and Tube
Inconel 718 pipe and tube covers UNS N07718 / Werkstoff 2.4668, a precipitation-hardenable alloy strengthened by double aging. Also, seamless product runs to ASTM B983, and aerospace tube follows AMS 5589 or AMS 5590. Duty spans downhole tools, wellhead equipment, and high-pressure fluid lines.
In fact, buyers typically arrive here choosing between fabrication-friendly solution-treated stock and fully aged product for direct service. The full chemistry, standards, and aging logic sit on the Inconel 718 material page, while bar and rod and sheet and plate supply appear on their own form pages.
For the property data behind the aged acceptance values, our Inconel 718 properties reference tabulates composition and mechanical minimums by condition.
PRODUCT FEATURES
Key Features of Inconel 718 Pipe and Tube
Southerly Alloy supplies UNS N07718 seamless pipe and tube to ASTM B983, with aerospace tube to AMS 5589 and AMS 5590 available against drawing. Sizes run from precision instrumentation tube to hot-finished heavy-wall pipe, delivered solution annealed or fully aged. EN 10204 3.1 certificates and sour-service documentation support downhole and wellhead review.
Inconel 718
High Strength After Aging
Specifically, solution-annealed-and-aged tube reaches 1034 MPa (150 ksi) minimum yield under ASTM B983.
01
Fatigue Life Under Cycling
In fact, vibration and thermal-cycling duty in fuel and hydraulic lines is where the grade earns its reputation.
02
Sour-Gas Suitability
Hardness and chemistry control support NACE MR0175 / ISO 15156 qualification for downhole service.
03
Cryogenic Through 650 °C Duty
Ductility holds at −253 °C, and strength carries continuous service near 650 °C.
04
Condition Choice
Therefore, solution-treated tube ships ready for machining and welding; aged tube ships ready for service.
05
Weldability of the Product Itself
Importantly, the slow aging response lets joints go in without strain-age cracking concerns.
06
Precision Bores
Moreover, cold-drawn instrumentation tube holds tight OD and wall tolerance for measurement lines.
07
WHY CHOOSE US
Why Choose Inconel 718
Ordering tubular product through Southerly Alloy puts the condition decision before the quotation. We confirm standard, size, and condition against your service plan first. After that, production runs with the partner plant responsible for melting and forming, and the certificate names the producing heat.
01
Condition-First Review
Fabrication steps and service load decide solution-treated versus aged before price does.
02
Heat-Line Documentation
Every tube length carries heat-number records back through the producing plant.
03
Testing to Order
We scope hydrostatic, eddy-current, UT, and PMI to the purchase line rather than sell them as extras.
04
Project-Ready Export
We prepare bundling, end protection, and shipping documents for site delivery schedules.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Seamless 718 tubular product follows one continuous route, and the aging step at the end decides the delivered condition. Above all, we never substitute cold-worked and aged product with annealed stock when the order calls for strength.
01
Billet Verification
We check round billets against the UNS N07718 chemistry window before heating.
02
Hot Extrusion or Piercing
We pierce and extrude heated billets to hollows for the seamless route.
03
Cold Sinking or Rolling
We draw or roll hollows to the ordered OD and wall with intermediate anneals.
04
Solution Treatment
We anneal the product near 940–1010 °C and quench it to set up the aging response.
05
Double Aging
A two-stage hold near 718 °C and 621 °C precipitates the Ni₃Nb phase that delivers the strength.
06
Straightening and Finishing
Sizing, pickling, and end finishing deliver the specified surface and length.
07
Final Testing
We review hydrostatic, eddy-current, tensile, and hardness results before releasing the paperwork.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Inconel 718 pipe and tube supply covers precision instrumentation tube, hydraulic line stock, and hot-finished heavy-wall pipe. In addition, we hold both solution-treated and aged stock. Finally, we confirm wall tolerance, end finish, and length against the purchase order before scheduling production.
20,000+ m²
Production Area
Partner workshops for extrusion, cold drawing, aging, and finishing under coordinated scheduling.
50+
Processing Machines
Piercing, drawing, straightening, and heat-treatment equipment across the seamless route.
600 Tons
Monthly Output
Seamless nickel alloy tube and pipe across standard and custom sizes.
30+
Technical Engineers
Condition, welding, and inspection support from inquiry to release.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
We release every Inconel 718 pipe and tube lot against the ordered standard. The ISO 9001 quality system checks chemistry, mechanicals, hardness, dimensions, and non-destructive testing. EN 10204 3.1 documentation is standard, and we compile sour-service files where projects call for them.
01
Chemical Analysis
We check spectrometer results against the UNS N07718 window before cutting any length.
02
Mechanical Testing
Tensile, yield, elongation, and hardness confirm the ordered condition and standard.
03
NDT Scope
Eddy current, hydrostatic, and UT examinations run to the acceptance level stated in the order.
04
Documentation
Consequently, EN 10204 3.1 mill test certificates carry heat-number traceability on every shipment.
PRODUCT FORMS
Available Product Forms
Specifically, Inconel 718 tubular supply splits by manufacturing route, and each route carries its own specification and size window.
02
Seamless Tube (AMS 5589 / 5590)
Similarly, aerospace-grade Inconel 718 tube for fuel, hydraulic, and pneumatic systems.
Request Availability →
03
Instrumentation Tube (ASTM B983)
Cold-drawn precision tube for measurement and control lines.
Request Availability →
04
Heavy-Wall Pipe (ASTM B983)
Hot-finished product for downhole tool bodies and high-pressure spools.
Request Availability →
05
Custom Tube Assemblies
Coils, U-bends, and cut lengths prepared against project drawings.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Tubular duty is where aged strength and corrosion resistance meet pressure, temperature, and cyclic load at once. Therefore, condition and wall carry the design. Overall, the applications below account for most inquiries.
Discuss Your Application →
01
Downhole and HPHT Tools
B983 heavy-wall product for tool bodies, hangers, and subsurface safety valves.
02
Wellhead and Christmas Tree Equipment
Moreover, components aligned with API 6A requirements in sour fields.
03
Aerospace Fuel and Hydraulic Lines
AMS tube holding tight tolerance through thermal-cycling duty.
04
Chemical Injection Lines
Similarly, small-bore tubing carrying inhibitors into aggressive wells.
05
Nuclear and Power Systems
High-temperature water and steam circuits with rigorous NDE acceptance.
06
Gas Turbine Piping
Seals, manifolds, and transfer lines near the hot section.
07
Cryogenic Lines
Liquefied-gas hardware where ductility must survive −253 °C.
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 B983 and the aerospace AMS tube specifications for UNS N07718. However, the governing purchase specification takes precedence for acceptance on AMS tube and pipe.
| Element | Content |
|---|---|
| Nickel (Ni) | 50.0–55.0% |
| Chromium (Cr) | 17.0–21.0% |
| Iron (Fe) | Balance |
| Niobium + Tantalum (Nb + Ta) | 4.75–5.50% |
| Molybdenum (Mo) | 2.80–3.30% |
| Titanium (Ti) | 0.65–1.15% |
| Aluminum (Al) | 0.20–0.80% |
| Cobalt (Co) | 1.00% max. |
| Carbon (C) | 0.08% max. |
| Manganese (Mn) | 0.35% max. |
| Silicon (Si) | 0.35% max. |
| Copper (Cu) | 0.30% max. |
| Phosphorus (P) | 0.015% max. |
| Sulfur (S) | 0.015% max. |
| Boron (B) | 0.006% max. |
Mechanical Properties
Minimum room-temperature values below apply to precipitation-hardened seamless product, because aging develops the full strength of the grade. Condition and standard govern final acceptance.
| Product Form | Standard | Condition | Tensile Strength | Yield Strength, 0.2% Offset | Elongation |
|---|---|---|---|---|---|
| Seamless pipe and tube | ASTM B983 | Solution annealed + precipitation hardened | ≥1034 MPa (150 ksi) | ≥862 MPa (125 ksi) | ≥20% |
| Bar and forgings (reference) | ASTM B637 | Solution treated + aged | ≥1275 MPa (185 ksi) | ≥1034 MPa (150 ksi) | ≥12% |
Aerospace AMS 5589 and AMS 5590 deliveries carry condition-specific minimums and extra process controls. Confirm the required condition at inquiry so we quote the correct standard.
Physical Properties
| Property | Value |
|---|---|
| Alloy | Inconel 718 |
| UNS | N07718 |
| Werkstoff | 2.4668 |
| Density | Approx. 8.19 g/cm³ |
| Melting Range | Approx. 1260–1336°C |
| Elastic Modulus | Approx. 200 GPa |
| Thermal Conductivity | Approx. 11.4 W/m·°C at 20 °C |
| Expansion Coefficient | 13.0 µm/m·°C (20–100 °C) |
| Typical Aged Hardness | 36–44 HRC |
| Alloy Type | Nickel-chromium-iron |
Standards
| Standard | Product / Application |
|---|---|
| ASTM B983 | Seamless pipe and tube (precipitation hardened) |
| ASTM B829 | General requirements for seamless pipe and tube |
| ASTM B637 | Bar and forging stock reference for flanges and fittings |
| ASME SB983 | Counterpart for boiler and pressure-code work |
| SAE AMS 5589 | Seamless tube, solution treated and aged |
| SAE AMS 5590 | Seamless tube, solution treated |
| DIN 17751 | Nickel alloy pipe and tube, W.Nr. 2.4668 |
| ISO 6207 | Nickel alloy seamless tube |
| NACE MR0175 / ISO 15156 | Sour-service qualification (cited for reference) |
| API 6A | Wellhead and downhole equipment compliance |
ASTM publishes the governing documents at ASTM International, and the ASME counterpart applies once each tubular order falls under pressure-code jurisdiction. Additionally, buyers should verify sour-service qualification against the current NACE MR0175 / ISO 15156 edition for each tubular order.
Dimensions
| Product Form | Typical Supply Range | Length |
|---|---|---|
| Seamless pipe | OD 6–219 mm, wall 0.5–15 mm | Single Random, Double Random or Custom |
| Hot-finished pipe | OD up to 610 mm, heavier wall | Single Random or Custom |
| Precision tube | OD 3–50 mm, tight-tolerance wall | Custom cut lengths or coils |
| Custom assemblies | Coils and U-bends to project drawings | — |
We quote sizes outside the listed windows against billet availability. Therefore, state OD, wall, length, condition, and end finish in the inquiry for an accurate route and price.
Surface Finishes
| Surface Condition | Typical Characteristics / Applications |
|---|---|
| Solution Annealed & Pickled | Standard delivered condition for fabrication stock |
| Aged & Pickled | Final high-strength condition after double aging |
| Bright Annealed | Smooth, scale-free bore and OD for instrumentation and clean service |
| 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 tubular inquiries move from condition review to shipment in two to four weeks. However, aged and hot-finished product sits at the longer end. The steps below keep the standard and condition aligned with your service plan before we fix the price.
1
Send Your Inquiry
State OD, wall, length, quantity, condition, and the medium and temperature the line carries.
2
Select the Standard
ASTM B983 for commercial seamless product, or AMS 5589/5590 for aerospace lines.
3
Confirm the Condition
Solution-treated stock for machining and welding, or aged product for direct service.
4
Review the Quotation
Pricing reflects route, aging scope, testing, documentation, and Incoterm.
5
Production and Inspection
Manufacturing and NDT run to the acceptance level agreed at quotation.
6
Shipment and Documentation
Delivery leaves with 3.1 certificates and complete 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 standard governs Inconel 718 seamless pipe and tube?
ASTM B983 is the governing seamless pipe and tube specification for UNS N07718, with ASTM B829 general requirements behind it. Aerospace lines normally order to AMS 5589 or AMS 5590 instead.
Should Inconel 718 pipe be bought aged or solution-treated?
Solution-treated stock suits machining, welding, and further fabrication. In addition, aged product carries the full 1034 MPa (150 ksi) class yield and goes straight into service.
Is Inconel 718 pipe suitable for sour service?
Yes. The chemistry and hardness control support NACE MR0175 / ISO 15156 qualification. As a result, sour-service orders receive chemistry, hardness, and traceability records compiled for review.
Can Inconel 718 tube be welded after delivery?
Yes. Joining proceeds in the solution-treated condition with ERNiFeCr-2 filler, and we age the assembly afterward where properties demand it.
How is Inconel 718 pipe priced?
We price Inconel 718 pipe by weight (kg). Quotations therefore reflect the nickel surcharge, dimensions, route, testing, quantity, delivery terms, and Incoterm.
For Inconel 718 pipe and tube pricing and the 2026–2027 outlook, see our Inconel metal price analysis.
What is your MOQ for Inconel 718 pipe?
Single-length orders are available for stocked OD and wall combinations.
What are your trade terms for Inconel 718 pipe?
We quote FOB as standard, with EXW, CIF, and DAP available against confirmed destinations.
What is the lead time for Inconel 718 pipe and tube?
Stocked sizes ship in 7-15 days. Meanwhile, we schedule aged and hot-finished product 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, standard, condition, and length. In return, the quotation returns route, test scope, Incoterm, and lead time. Additionally, you can attach service details such as medium and temperature for condition confirmation.
