01
Seamless Pipe
Hot-worked and cold-drawn pipe to ASTM B407 for pressure piping, manifolds, and furnace connections.
Request Availability →Incoloy 800 / 800H / 800HT Pipe and Tube
Seamless pipe, heat-exchanger tube, and welded product for cracking, reforming, and high-temperature steam duty.
Three Tubular Routes, One Family
Seamless pipe, heat-exchanger tube, and welded product are each quoted against the grade and the ASTM specification that governs it, rather than against a single generic route.
Pressure Test Results Traceable to the Length
Hydrostatic or eddy-current records follow the piece count, so you can see which lengths passed and against which clause.
Grain Size on the Tube Certificate
We check every 800H and 800HT tube order to ASTM E112 before release, because creep duty rests on that number.
PRODUCT OVERVIEW
About Incoloy 800 / 800H / 800HT Pipe and Tube
Incoloy 800 / 800H / 800HT pipe and tube comes in UNS N08800, N08810 and N08811 for hot, carburizing service. Three tubular routes carry this iron-nickel-chromium family, and each one answers to its own ASTM specification.
Cracking furnace coils, reformer pigtails, and superheater tubing are the usual destinations for this material. Southerly Alloy works as a professional supplier and exporter across all three routes, and the Incoloy 800 / 800H / 800HT material page carries the grade data behind the tube choice. Above all, the grade follows the duty temperature rather than the tube diameter.
PRODUCT FEATURES
Key Features of Incoloy 800 / 800H / 800HT Pipe and Tube
Incoloy 800 / 800H / 800HT pipe and tube covers three tubular routes on one iron-nickel-chromium family. ASTM B407 governs seamless pipe and tube, B163 covers heat-exchanger tube, and B514 with B515 covers welded product, with the same design divide at about 593 °C. Cracking furnace coils, reformer pigtails, and superheater tubing are the usual destinations. Southerly Alloy works as a professional supplier and exporter in all three routes, and every length ships with EN 10204 3.1 documentation.
Incoloy 800 / 800H / 800HT
Seamless Pipe to ASTM B407
Cold-drawn and hot-worked routes cover the pressure range, and we write the hydrostatic test into the order before cutting the lengths.
01
Heat-Exchanger Tube to ASTM B163
We draw condenser and heat-exchanger tube to close wall tolerance, then run eddy-current testing when your specification asks for it.
02
Welded Pipe and Tube to B514 and B515
Large-diameter welded product extends the size range well beyond the seamless ceiling, with the weld seam tested as a matter of course.
03
Creep Strength Above 593 °C
The controlled-carbon 800H and 800HT routes keep their load-carrying capacity where grade 800 would begin to sag under long exposure.
04
Oxidation and Carburization Resistance
A chromium oxide scale and a nickel-rich matrix together slow both surface scaling and carbon ingress in furnace gas.
05
U-Bend and Coiled Supply
We produce U-bent lengths and coiled tube for exchanger bundles and for field installation where long straight runs are impractical.
06
Grain Size Verified per Lot
We report E112 results for 800H and 800HT, so the coarse-grain requirement rests on a measured number rather than an assumption.
07
WHY CHOOSE US
Why Choose Incoloy 800 / 800H / 800HT
Tube orders fail on documentation as often as material, so we settle the test and paperwork before the first cut. Moreover, one coordinator stays on the file from inquiry to bill of lading. In addition, we quote the lead time we can hold.
01
Specification Settled Before Cutting
We agree grade, standard, temper, and test level in writing, which keeps the delivered tube aligned with what your inspector expects.
02
Documents Matched to Your Receiving Checks
We build the certificate set around your incoming inspection, not around a fixed template that may omit a clause you need.
03
Witness Points Arranged on Request
We book third-party inspection and EN 10204 3.2 endorsement through the order when your project requires a second signature.
04
Packing Built for Long Transit
Straight lengths travel in wooden cases and coils in steel-strapped bundles, with end caps and desiccant where the route warrants them.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Tubular production adds forming and pressure steps that bar and plate never see, so each leaves a control point. Therefore, the sequence below runs from melt chemistry to the packed length. Moreover, the route records every result against the heat and the piece count.
01
Melt Chemistry Set to Grade
The melt shop weighs nickel, chromium, and iron to the ordered UNS window, and targets carbon for grade 800, 800H, or 800HT.
02
Ingot to Tube Blank
The melt shop forges or rolls down the cast ingot, then bores or pierces it into a hollow ready for forming.
03
Hot Extrusion or Rotary Rolling
The press extrudes or rolls the hollow over a mandrel to build the tube wall and set the initial dimensions.
04
Cold Drawing and Intermediate Anneal
Successive draw passes reduce wall and diameter, with an anneal between passes to restore ductility.
05
Solution Annealing at Grade Temperature
The furnace anneals 800H at 1121 °C minimum and 800HT at 1149 °C minimum, which sets the coarse-grain structure the creep duty needs.
06
Grain Size Confirmation
The laboratory etches and rates a specimen per lot to ASTM E112, and a fine grain becomes a rejection rather than a concession.
07
Pressure and Nondestructive Testing
The laboratory applies hydrostatic, eddy-current, or ultrasonic examination according to the ordered specification and the intended service.
08
Length Marking and Packing
The packing crew marks heat number, grade, size, and standard on each length, then cases or bundles the order for shipment.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
We schedule tube output around the drawing benches and the annealing furnaces, because those two steps set the achievable lead time. Consequently, the figures below describe the capacity behind a quoted date. In addition, we campaign mixed-grade orders where the anneal temperatures allow it.
20,000+ m²
Factory Area
Tube drawing, annealing, and testing lines sit under one roof.
50+
Production Machines
Cold-drawing benches, pilger mills, and annealing furnaces run daily.
600 Tons
Monthly Capacity
Pipe and tube output across the three 800-series grades.
30+
Technical Engineers
Metallurgists who confirm grade, grain size, and test requirements with you.
3
Product Forms
Seamless pipe, heat-exchanger tube, and welded product on one qualified route.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
We release a tube length only when the ordered test set has proven out on the heat that produced it. In addition, the pressure test and the dimensional check carry a record for every piece. Consequently, no nonconforming length can hide inside a shipment.
01
Chemistry Confirmed per Heat
Spectrometer analysis verifies carbon, the Al+Ti total, and the balance against the ordered UNS limits.
02
Mechanical Tests on the Delivered Temper
Tensile and hardness results come from material in the condition you will receive, not from an as-cast reference sample.
03
Dimensional and Surface Checks
The inspection bench measures outside diameter, wall thickness, ovality, and straightness to the tolerance class of the governing standard.
04
Pressure and NDT Records
We file hydrostatic, eddy-current, or ultrasonic results against the piece count and issue them with the certificate package.
PRODUCT FORMS
Available Product Forms
The tubular range splits by standard rather than by size alone, since each route carries its own dimensional and testing rules. Meanwhile, the grade question stays the same across all of them.
02
Seamless Heat-Exchanger Tube
Close-tolerance tube to ASTM B163 for shell-and-tube exchangers, condensers, and feedwater heaters.
Request Availability →
03
Welded Pipe
Large-diameter pipe to ASTM B514 with B775, used where the seamless range runs out.
Request Availability →
04
Welded Tube
Welded tube to ASTM B515 with B751 for lower-pressure exchanger and furnace duty.
Request Availability →
05
U-Bent Tube
Bent to your bundle drawing with controlled ovality through the bend for exchanger assembly.
Request Availability →
06
Coiled Tube
Long coils for reformer pigtails and for field runs where a straight length takes several welds.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Reformer and cracking furnaces take most of the tubular tonnage, since the tube wall sits between hot gas and a pressure boundary. Furthermore, the same properties serve superheater and nuclear steam-generator duty, where the demand is longer life rather than a higher ceiling.
Discuss Your Application →
01
Ethylene Cracking Coils
Radiant coil tube and transfer-line exchanger tubing that runs carburizing gas at 750–900 °C.
02
Reformer Pigtails and Manifolds
Outlet pigtail tube, collector headers, and transfer piping on steam-methane reforming units.
03
Steam Superheater and Reheater Tubes
Tubing for superheater and reheater sections in conventional, combined-cycle, and waste-to-energy boilers.
04
Nuclear Steam Generator Tubing
Heat-transfer tube for pressurized water reactors, where the design life runs into decades.
05
Heat-Treatment Furnace Radiant Tube
Radiant tube, muffles, and retorts for carburizing, nitriding, and annealing furnaces.
06
Process Heat Exchangers
Shell-and-tube exchangers in petrochemical and chemical service, including nitric acid and VCM process streams.
07
Thermowell and Protection Sheath
Protection tube for thermocouples and sampling probes in hot furnace atmospheres.
08
Steam Methanation and Syngas Piping
High-temperature syngas and steam lines where thermal cycling rules out a lower-alloy choice.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
All three grades sit on one composition table, and the tubular standards adopt it unchanged. Carbon, the Al+Ti total, and the annealed grain size are the only fields that move between the designations. In addition, the mill test certificate governs final acceptance.
| Element | Alloy 800 (UNS N08800) | Alloy 800H (UNS N08810) | Alloy 800HT (UNS N08811) |
|---|---|---|---|
| Nickel (Ni) | 30.0–35.0% | 30.0–35.0% | 30.0–35.0% |
| Chromium (Cr) | 19.0–23.0% | 19.0–23.0% | 19.0–23.0% |
| Iron (Fe) | 39.5% min. | 39.5% min. | 39.5% min. |
| Carbon (C) | 0.10% max. | 0.05–0.10% | 0.06–0.10% |
| Aluminium (Al) | 0.15–0.60% | 0.15–0.60% | 0.25–0.60% |
| Titanium (Ti) | 0.15–0.60% | 0.15–0.60% | 0.25–0.60% |
| Aluminium + Titanium | 0.30–1.20% | 0.30–1.20% | 0.85–1.20% |
| Copper (Cu) | 0.75% max. | 0.75% max. | 0.75% max. |
| Manganese (Mn) | 1.50% max. | 1.50% max. | 1.50% max. |
| Silicon (Si) | 1.00% max. | 1.00% max. | 1.00% max. |
| Sulfur (S) | 0.015% max. | 0.015% max. | 0.015% max. |
| Annealed Grain Size | Not specified | ASTM 5 or coarser | ASTM 5 or coarser |
Mechanical Properties
The minimums below come from the tube and pipe tables, and they differ between B407 and B163 only in how each standard names the condition. Consequently, the ordered temper decides which row applies to your delivery.
| Standard and Condition | Grade | Tensile Strength, min. | Yield Strength (0.2%), min. | Elongation, min. |
|---|---|---|---|---|
| B407 seamless — cold-drawn, annealed | N08800 | 75 ksi (520 MPa) | 30 ksi (205 MPa) | 30% |
| B407 seamless — hot-worked, annealed or as-hot-worked | N08800 | 65 ksi (450 MPa) | 25 ksi (170 MPa) | 30% |
| B407 seamless — hot-worked or cold-worked, annealed | N08810 / N08811 | 65 ksi (450 MPa) | 25 ksi (170 MPa) | 30% |
| B163 heat-exchanger tube — annealed | N08800 | 75 ksi (517 MPa) | 30 ksi (207 MPa) | 30% |
| B163 heat-exchanger tube — cold-worked | N08800 | 83 ksi (572 MPa) | 47 ksi (324 MPa) | 30% |
| B163 heat-exchanger tube — annealed | N08810 / N08811 | 65 ksi (448 MPa) | 25 ksi (172 MPa) | 30% |
| B514 welded pipe — as-welded or annealed | N08800 | 75 ksi (520 MPa) | 30 ksi (205 MPa) | 30% |
| B514 / B515 welded product — annealed | N08810 / N08811 | 65 ksi (450 MPa) | 25 ksi (170 MPa) | 30% |
Two footnotes belong with the table above. First, the yield strength requirement does not apply to material thinner than 0.020 in. (0.51 mm). Second, hydrostatic testing applies to tube with an outside diameter of 1/8 in. or more and a wall of 0.015 in. or more, calculated from P = 2St/D. The allowable fibre stress is 18,700 psi (130 MPa) for cold-drawn annealed N08800, and 16,600 psi (115 MPa) for hot-finished N08800 and for annealed N08810 and N08811.
Physical Properties
The values below are typical for all three grades, since the carbon window does not change the physical base. In short, they serve design work rather than acceptance testing.
| Property | Value |
|---|---|
| Density | Approx. 7.94 g/cm³ |
| Melting range | Approx. 1357–1385 °C |
| Specific heat, 0–100 °C | Approx. 460 J/kg·°C |
| Modulus of elasticity at 20 °C | Approx. 196.5 GPa |
| Thermal conductivity at 20 °C | Approx. 11.5 W/m·K |
| Thermal expansion, 20–100 °C | Approx. 14.4 µm/m·°C |
| Electrical resistivity at 20 °C | Approx. 0.989 µΩ·m |
| Curie temperature | Approx. −115 °C |
| Magnetic behaviour | Non-magnetic at ambient temperature |
| Hardness, annealed | Approx. 138 HB |
Standards
Each tubular route carries its own ASTM specification, and the welded routes pair with a general-requirements document that governs testing and tolerances. Therefore, quote the form first and the grade second, since the form decides which standard applies. Reference ASTM International for the current text of any specification named here.
| Standard / Designation | Scope |
|---|---|
| ASTM B407 / ASME SB407 (with B829) | Seamless pipe and tube — UNS N08800, N08810, N08811 |
| ASTM B163 / ASME SB163 | Seamless condenser and heat-exchanger tube |
| ASTM B514 (with B775) | Welded pipe — general requirements under B775 |
| ASTM B515 (with B751) | Welded tube — general requirements under B751 |
| ASTM B408 / ASME SB408 | Rod and bar, for tube sheet and support hardware |
| ASTM B564 / B366 | Forgings, and wrought pipe fittings |
| ASME Code Case 1325 | Elevated-temperature design allowables for 800H, Sections I and VIII Divisions 1 and 2 |
| ASME Code Case 1983 | 800H design allowables to 1800 °F (982 °C), Section VIII Division 1 |
| ASME Code Case 1987 | Maximum allowable stresses for 800HT |
| ASME Code Cases N-201 / N-253 / N-254 | Nuclear construction under Section III, including steam-generator tubing |
| UNS N08800 / N08810 / N08811 | Material designations for Alloy 800, 800H and 800HT |
| W.Nr. 1.4876 / 1.4958 / 1.4959 | European designations, EN X10NiCrAlTi32-20 / X5NiCrAlTi31-20 / X8NiCrAlTi32-21 |
| EN 10095 / DIN 17459 / DIN 17460 | European heat-resisting materials standards, by product form |
| BS 3074 (NA 15 series) | British seamless tube designation for the 800 series |
| JIS NCF 800 / NCF 800H / NCF 800HT | Japanese designations for the series |
| ISO FeNi32Cr21AlTi (NW8800 / NW8810 / NW8811) | ISO designations, the HC and HT suffixes marking the 800H and 800HT compositions |
| ISO 6207 | Seamless tube in nickel and nickel alloys |
Dimensions
Sizes below describe the routes we normally produce, and the standard sets the seamless ceiling rather than our preference. Meanwhile, welded product covers the larger diameters that seamless tube cannot reach.
| Product Form | Typical Supply | Length |
|---|---|---|
| Seamless pipe | 6–219 mm OD | Random or cut to length |
| Seamless heat-exchanger tube | 6–76 mm OD | Cut to length |
| Seamless tube, heavy wall | 6–219 mm OD, wall to 25 mm | Cut to length |
| Welded pipe | 12–2032 mm OD | Random or cut to length |
| Welded tube | 12–152 mm OD | Cut to length |
| U-bent tube | 6–76 mm OD, bend radius to drawing | Per bundle drawing |
| Coiled tube | 6–38 mm OD | Coil, or cut to length |
Surface Finishes
The next operation decides the tube finish, and pickling is the usual default for furnace and exchanger work. Note that 800H and 800HT receive their finish after solution annealing, so a later pass does not disturb the coarse grain.
| Surface Condition | Typical Use |
|---|---|
| Solution annealed and pickled | Standard delivery condition for 800H and 800HT tube, with the ASTM 5 or coarser grain in place |
| Hot-finished | As-produced surface for lengths that will be machined or welded at the ends only |
| Cold-drawn | Close wall and diameter control with a brighter surface for exchanger tube |
| Bright annealed | Oxide-free finish produced in a controlled atmosphere for clean service |
| Ground or polished | Reduced roughness for product-contact or visible tube surfaces |
| U-bent and stress relieved | Bent tube for exchanger bundles, with the bend zone treated as the drawing requires |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 7 Simple Steps
The governing standard fixes the tubular route, so the specification question comes before the price. As a result, we ask for the form and the grade together, and then confirm the test level you need.
1
Send the Requirement
Share the form, grade, size, wall, quantity, and the standard you are ordering against.
2
Confirm the Standard
We check whether the duty calls for B407, B163, B514, or B515, and flag any clause that changes the price.
3
Fix the Test Level
We write the hydrostatic, eddy-current, ultrasonic, or PMI requirements into the quotation rather than adding them later.
4
Receive the Offer
Price, lead time, and the document list arrive in one reply, with the packing method stated.
5
Produce and Anneal
Melting, forming, drawing, and the grade-specific anneal run in sequence, with grain size checked before release.
6
Test and Release
The laboratory performs the ordered pressure and nondestructive tests, and we file the results against the piece count.
7
Ship the Order
Marked lengths and coils leave in export packing, and the paperwork travels with the consignment.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“The reformer pigtail coils arrived with the anneal and grain size already documented, and the ovality through the bends matched the bundle drawing.”
★★★★★
“We asked for eddy-current records on every exchanger tube, and the certificate package listed them length by length without a follow-up request.”
★★★★★
“Mixing welded and seamless in one order caused no problem, and each line carried its own standard designation.”
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 covers Incoloy 800 seamless pipe?
ASTM B407 / ASME SB407, and heat-exchanger tube moves to ASTM B163 / ASME SB163. Buyers order welded product to B514 for pipe or B515 for tube.
When should I move from grade 800 to 800H or 800HT?
Once the wall carries load above about 593 °C, and especially where the design life runs into tens of thousands of hours. Therefore, creep rather than yield governs the wall thickness above that line.
Does the grain size requirement apply to tubular product?
Yes, for 800H and 800HT. Both grades require ASTM 5 or coarser in the annealed condition. Furthermore, the tube standards test it per lot.
Are welded and seamless tube interchangeable?
Not directly. However, welded product reaches larger diameters and costs less per metre at those sizes, while seamless tube carries the higher pressure rating and avoids a weld seam in the pressure boundary.
How is the tube pressure-tested?
Hydrostatic testing follows P = 2St/D, with an allowable fibre stress of 18,700 psi (130 MPa) for cold-drawn annealed N08800. In addition, we run eddy-current or ultrasonic testing when the order asks for it.
Can you supply U-bent or coiled tube?
Yes. Send the bundle drawing or the coil length. In addition, we confirm the bend radius, the ovality limit, and the heat treatment of the bend zone.
What is your MOQ for Incoloy 800 pipe and tube?
One length or one coil for most stock sizes.
What are your trade terms for Incoloy 800 tube?
FOB is our usual basis, and we can quote EXW or CIF when you prefer those terms.
What is the lead time for Incoloy 800 pipe?
Stock sizes move in 7-15 days, and grain-controlled 800H or 800HT tube takes about 25 days.
Do you issue EN 10204 3.1 and 3.2 certificates?
Both, with 3.1 issued as standard on every heat and 3.2 arranged through a third party on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the form, grade, size, wall, quantity, and standard to receive price, lead time, and the document list in one reply. In addition, tell us the duty temperature, because that answer decides whether grade 800 is enough.
We stock Incoloy 800, 800H and 800HT pipe and tube in common sizes and produce to your specification, and we accept short trial lengths on many stock items.
