01
Incoloy 800 Round Bar
General-purpose rounds in hot-worked and annealed conditions for machined furnace and process parts.
Request Availability →Incoloy 800 / 800H / 800HT Bar and Rod
Iron-nickel-chromium bar and rod for reformers, heat-treatment fixtures and power boilers, supplied across the 800, 800H and 800HT grades.
Grain Size on the Certificate
800H and 800HT bar are annealed to ASTM 5 or coarser grain, with E112 results reported per lot.
Three Grades, One Line
UNS N08800, N08810, and N08811 run on the same qualified route, so mixed-grade orders ship as one campaign.
Creep Chemistry Verified
Carbon and Al+Ti are reported per heat on the EN 10204 3.1 certificate, so the creep-relevant window is documented.
PRODUCT OVERVIEW
About Incoloy 800 / 800H / 800HT Bar and Rod
Incoloy 800 series bar covers three grades on one iron-nickel-chromium base: Alloy 800, its creep-controlled 800H variant and the higher-temperature 800HT. Incoloy 800 (UNS N08800) resists oxidation and carburization in hot atmospheres, and the series holds strength where stainless steels sag.
Southerly Alloy supplies round bar, rod, and forged sections to ASTM B408 and ASME SB408 in hot-worked, cold-drawn, and solution-annealed conditions. Steam reformers, heat-treatment fixtures, and power boilers are the usual destinations for this bar.
PRODUCT FEATURES
Key Features of Incoloy 800 / 800H / 800HT Bar and Rod
Incoloy 800, 800H, and 800HT are iron-nickel-chromium alloys supplied as bar and rod to ASTM B408, combining oxidation resistance, carburization resistance, and controlled creep strength at elevated temperatures. UNS N08800 covers general high-temperature service, while the higher-carbon, grain-controlled N08810 and N08811 grades carry design values for long-term duty above 593 °C. Southerly Alloy supplies the series in hot-worked, cold-drawn, and solution-annealed conditions with custom sizes, surface finishes, and mill test documentation. Reformer, furnace, and power-generation projects are typical buyers of this bar.
Incoloy 800 / 800H / 800HT
Oxidation Resistance in Hot Air
A chromium-rich scale holds firm through continuous high-temperature service.
01
Carburization and Sulfidation Resistance
Resists carbon and sulfur pickup in carburizing atmospheres and sulfur-bearing furnace gas.
02
Controlled Creep Performance
800H and 800HT carry controlled carbon, Al+Ti and grain size for predictable creep-rupture life.
03
Chloride SCC Resistance
High nickel content resists chloride stress-corrosion cracking in aqueous service.
04
Solution-Annealed Delivery
800H and 800HT bar are annealed at 1121 °C minimum to set the coarse-grain structure.
05
Three-Grade Supply Range
Alloys 800, 800H, and 800HT are quoted as one series, matched to your duty temperature.
06
Machining and Fabrication
Machines with standard practice and welds with matching nickel alloy filler metal.
07
Certificate-Backed Traceability
EN 10204 3.1 certificates with heat numbers travel with every delivery.
08
WHY CHOOSE US
Why Choose Incoloy 800 / 800H / 800HT
Incoloy 800 series bar is melted, annealed, and finished on one site. Grade, grain size, and delivery condition are agreed before cutting, and quotations state the commitments we can keep. One coordinator owns your order from the first message to shipment.
01
Specification Matched First
Your grade, UNS number, condition, and diameter are checked against ASTM B408 before production starts.
02
Grain Structure Controlled
800H and 800HT annealing is set to reach ASTM 5 or coarser grain before the bar is released.
03
Flexible Order Size
A single trial bar and a full container load run through the same qualified route.
04
Straight-Talking Quotations
Offers state grade, condition, size, and documentation, so comparison with other suppliers is simple.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Incoloy 800 series bar is produced through a melting and remelting route selected for the ordered grade. For 800H and 800HT, solution annealing at a minimum of 1121 °C and grain size verification are added control points. Test results are recorded against the heat number.
01
Charge Selection
Nickel, chromium and iron are weighed to the UNS N08800, N08810 or N08811 window, with carbon targeted for the ordered grade.
02
Melting and Refining
The charge is melted and refined through AOD or VOD to hold chemistry and gas content within limits.
03
Electroslag Remelting
Where cleanliness demands it, ESR refines the ingot and reduces segregation across the section.
04
Hot Working
Ingots are forged and rolled to bar section, breaking down the cast structure as size reduces.
05
Solution Annealing
800H and 800HT bars are annealed at 1121 °C minimum and cooled to set the coarse-grain structure.
06
Cold Finishing
Drawing, peeling, or centreless grinding brings the bar to the final diameter, tolerance, and surface.
07
Grain Size Verification
One test per lot to ASTM E112 confirms the ordered grain size requirement for N08810 and N08811.
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Inspection and Release
Chemistry, tensile properties, dimensions, and surface are verified against the purchase specification.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Incoloy 800, 800H, and 800HT bars are produced in stock and made-to-order diameters, with condition, finish, and cut length agreed before production. The figures below cover the melting, annealing, and inspection capacity behind that commitment. Mixed-grade orders are scheduled as one campaign.
20,000+ m²
Factory Area
production halls covering melting, annealing, and finishing under one roof.
50+
Production Machines
hot working, solution annealing, and cold finishing units in daily use.
600 Tons
Monthly Capacity
nickel-iron-chromium bar output across the three 800-series grades.
30+
Technical Engineers
metallurgists who set grade, condition, and grain size requirements with you.
3
Grade Designations
UNS N08800, N08810 and N08811 produced and documented on one route.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
Incoloy 800 series bar is released only after the ordered ASTM B408 requirements are demonstrated on the heat. Composition is checked by spectrometer, and tensile and hardness tests are run on the delivered condition. Grain size is tested per lot for 800H and 800HT.
01
Chemistry Held to the Window
Spectrometer analysis confirms carbon, Al+Ti, and the balance against the ordered UNS limits.
02
Dimensional Checks to B408
Diameter, straightness, and cut length are measured to the applicable tolerance class.
03
Tests on the Ordered Condition
Tensile and hardness are run on the delivered condition, with UT or PMI where specified.
04
Records That Follow the Bar
EN 10204 3.1 documents tie every bar to its heat number and test results.
PRODUCT FORMS
Available Product Forms
Round bar and rod carry most 800-series enquiries, with hex, square, flat and forged sections covering fixture, machining and furnace work. Each form below is quoted with its own grade, condition and tolerance route.
02
Incoloy 800H / 800HT Round Bar
Grain-controlled, solution-annealed rounds selected for creep duty above 593 °C.
Request Availability →
03
Incoloy 800 Round Rod
Smaller-diameter stock with controlled straightness for fasteners and turned components.
Request Availability →
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Incoloy 800 Bright Bar
Cold-drawn surface finish for automatic lathes and appearance-sensitive parts.
Request Availability →
05
Incoloy 800 Cold-Drawn Bar
Tighter diameter control and raised strength from the as-drawn condition.
Request Availability →
06
Incoloy 800 Hex and Square Bar
Multi-flat sections sized across flats for nuts, bolting, and fixture hardware.
Request Availability →
07
Incoloy 800 Flat Bar
Rectangular sections cut to your width and thickness for fabricated assemblies.
Request Availability →
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Incoloy 800 Forged Bar
Heavy sections forged to shape with a controlled wrought structure for large components.
Request Availability →
09
Centreless-Ground Rod
Ground diameter and straightness for precision shafting and pins.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Incoloy 800 series bar is chosen where heat, oxidation, and carburization rule out stainless steel. Higher-nickel grades often cost more than the duty needs. Petrochemical, heat-treatment, and power-generation projects are the main destinations.
Discuss Your Application →
01
Steam Reformer Hardware
Support rolls, hangers and manifolds machined from bar for reformer service.
02
Ethylene Cracking Units
Fixture and support parts inside transfer-line exchangers and cracking furnaces.
03
Heat-Treatment Fixtures
Baskets, trays and retorts that cycle through carburizing and annealing furnaces.
04
Ammonia and Hydrogen Plant Parts
Supports, fittings and valve trim in reforming and hydrogen service.
05
Heat Exchanger Supports
Tubesheet and baffle hardware inside high-temperature process exchangers.
06
Superheater and Boiler Components
Hangers, spacers and supports in steam service above 595 °C.
07
Electric Heating Element Sheaths
Bar machined into sheath and terminal components for heating elements.
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Power and Hydrocarbon Fasteners
Studs and bolts for flanged joints in high-temperature lines.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The limits below follow ASTM B408 for heat analysis, with iron as the balance of the melt. Carbon and the Al+Ti window are what separate the three grades. 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% | 0.15–0.60% |
| Titanium (Ti) | 0.15–0.60% | 0.15–0.60% | 0.15–0.60% |
| Aluminium + Titanium | — | — | 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
Minimums are taken from the ASTM B408 rod and bar tables and change with grade and condition. Alloy 800 can be supplied hot-worked as-worked, while 800H and 800HT are supplied solution annealed. Confirm the ordered grade and condition at quotation.
| Grade / Condition | Tensile Strength, min. | Yield Strength (0.2%), min. | Elongation, min. |
|---|---|---|---|
| N08800 — hot-worked, as-hot-worked | ≥80 ksi (550 MPa) | ≥35 ksi (240 MPa) | 25% |
| N08800 — cold-worked and hot-worked, annealed | ≥75 ksi (515 MPa) | ≥30 ksi (205 MPa) | 30% |
| N08810 / N08811 — cold-worked and hot-worked, annealed | ≥65 ksi (450 MPa) | ≥25 ksi (170 MPa) | 30% |
Forging-quality bar is furnished to chemical requirements and surface inspection only, without mandatory tensile values. Above about 593 °C (1100 °F), the grades separate in creep-rupture strength, with 800HT holding the highest stress-rupture life. Grade selection therefore follows duty temperature rather than room-temperature strength.
Physical Properties
Typical room-temperature values below support design work rather than acceptance testing. The three grades share the same physical base.
| Property | Value |
|---|---|
| Density | Approx. 7.94 g/cm³ |
| Melting range | Approx. 1357–1385 °C |
| Modulus of elasticity | Approx. 196 GPa |
| Thermal conductivity at 20 °C | Approx. 11.5 W/m·K |
| Thermal expansion, 20–100 °C | Approx. 14.4 µm/m·K |
| Electrical resistivity at 20 °C | Approx. 0.989 µΩ·m |
| Curie temperature | Below −196 °C |
| Magnetic behaviour | Non-magnetic at ambient temperature |
Standards
ASTM B408 governs rod and bar for all three grades, with ASME SB408 used in pressure equipment. The designations below are cross-references for procurement, not separate approvals.
| Standard / Designation | Scope |
|---|---|
| ASTM B408 | Nickel-iron-chromium alloy rod and bar — UNS N08800, N08810, N08811 |
| ASME SB408 | ASME edition for rod and bar |
| SAE AMS 5766 | Alloy 800 bars, forgings and rings |
| UNS N08800 / N08810 / N08811 | Material designations for Alloy 800, 800H and 800HT |
| W.Nr. 1.4876 / 1.4958 / 1.4859 | European designations for the three grades |
| ASME Code Cases 1325 / 1987 | Elevated-temperature design allowables for 800H and 800HT |
| JIS NCF 800 / NCF 800H / NCF 800HT | Japanese designations |
| BS NA 15 | British nickel-chromium-iron designation |
| EN 10095 | Heat-resistant steels and nickel alloys |
Grade Selection Guide
The three grades share one B408 chemistry base, so bar selection is decided by duty temperature and design code requirements. The guide below shows how the differences land on an order.
| Selection Factor | Alloy 800 | Alloy 800H | Alloy 800HT |
|---|---|---|---|
| UNS | N08800 | N08810 | N08811 |
| Carbon window | 0.10% max. | 0.05–0.10% | 0.06–0.10% |
| Al + Ti combined | 0.30–1.20% | 0.30–1.20% | 0.85–1.20% |
| Annealed grain size | Not specified | ASTM 5 or coarser | ASTM 5 or coarser |
| Solution anneal | Standard anneal | ≥1121 °C, grain controlled | ≥1121 °C, grain controlled |
| Typical bar duty | General service to about 593 °C | Creep-controlled service from 538 °C | Highest creep-rupture duty above 593 °C |
Dimensions
Ranges below reflect normally produced sections for the 800 series; availability depends on grade, condition, and quantity. Tolerances follow ASTM B408 for the ordered condition. State diameter, section, length, and finish in the inquiry.
| Product Form | Typical Supply | Length |
|---|---|---|
| Round Bar | 6–500 mm dia. | Cut to length or random |
| Round Rod | 3–50 mm dia. | Cut to length |
| Bright Bar | 6–150 mm dia. | Cut to length or random |
| Square Bar | 10–150 mm | Cut to length or random |
| Hex Bar | 10–150 mm A/F | Cut to length or random |
| Flat Bar | 3–100 mm thick × 10–300 mm wide | Cut to length |
| Forged Bar | 100–500 mm dia. or forged section | Cut to length |
| Precision-Ground Rod | 3–100 mm dia., tight tolerance | Cut to length |
Diameters and lengths outside these ranges are reviewed against the production route before quotation.
Surface Finishes
Finish is matched to the next operation, and 800H and 800HT bars are normally supplied solution annealed before finishing. Availability depends on diameter, condition, and order quantity.
| Surface Condition | Typical Use |
|---|---|
| Solution Annealed | Standard delivery condition for 800H and 800HT, setting the coarse-grain structure |
| Hot-Worked (As-Rolled) | Supplied as-worked for parts that will be machined to size |
| Cold Drawn | Close diameter control with a brighter surface |
| Peeled | Machined skin with uniform diameter for further turning |
| Centreless Ground | Tight diameter and straightness for precision components |
| Polished | Reduced roughness for visible or product-contact parts |
| Rough Turned | Machining allowance held on large or forged bar |
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
Grade and duty temperature decide the annealing route, so both are fixed before any bar is cut. Quotations carry a confirmed lead time, and specification questions are answered by the mill team, not a trading desk.
1
Start Your Inquiry
Share grade, UNS number, diameter, length, quantity, and duty temperature.
2
Fix the Grade
Alloy 800, 800H or 800HT is matched to your design code and service conditions.
3
Price the Order
The quotation covers size, grade, condition, documents, and lead time in one reply.
4
Lock the Specification
Dimensions, inspection level, and delivery terms are recorded before production.
5
Produce and Anneal
The heat is melted, worked, solution annealed, and tested to the ordered condition.
6
Ship with Documents
Certificates and export paperwork travel with the bar, and delivery terms are confirmed with you.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“The Incoloy 800H bar we ordered for reformer supports came with grain size results on the certificate, and the diameters machined straight to drawing.”
★★★★★
“Furnace baskets made from this 800HT bar have outlasted our previous fixture steel by two campaigns, with no scale shedding onto the load.”
★★★★★
“We mixed 800 and 800HT diameters in one shipment, and each heat arrived documented to the correct UNS and ASTM B408 condition.”
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 covers Incoloy 800, 800H and 800HT bar?
ASTM B408 / ASME SB408; AMS 5766 applies to Alloy 800 aerospace bar.
What is your MOQ for Incoloy 800 bar?
One bar for most stock diameters.
What are your trade terms for Incoloy 800 bar?
Mainly FOB; EXW and CIF can be quoted as well.
How is the price of Incoloy 800 bar calculated?
Mainly on weight, with the nickel and chromium share fixed at quotation.
What is the lead time for Incoloy 800 bar?
7-15 days for stock sizes; about 25 days for grain-controlled 800H and 800HT.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes. 3.1 comes with every heat; 3.2 is arranged on request.
What is the difference between Incoloy 800, 800H, and 800HT bars?
Carbon window, Al+Ti range, and grain size control. Alloy 800 suits general duty; 800H and 800HT add controlled creep strength above 593 °C, with 800HT being the highest.
Which grade should I order for furnace fixtures above 900 °C?
Alloy 800HT, subject to your design code review; send the duty temperature for confirmation.
Can you supply custom diameters and cut lengths?
Yes. Drawing, peeling, and grinding cover sizes outside the stock range.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the grade, UNS number, diameter, quantity, and duty temperature to receive price, lead time, and certificates in one reply. The annealing condition is fixed before production, so the material you approve matches the heat that ships.
Incoloy 800, 800H, and 800HT bars are stocked in common diameters or produced to your drawing, with single-bar trials accepted for many sizes.
