Incoloy 800HT bar price is shaped by nickel, chromium, titanium, and aluminum raw-material costs, together with bar dimensions, heat-treatment condition, surface finish, tolerance, inspection scope, order quantity, and delivery terms. Incoloy 800HT is a high-temperature nickel-iron-chromium alloy intended for equipment exposed to heat, oxidation, carburizing gases, nitriding atmospheres, and long-term elevated-temperature service. For this reason, a useful factory quotation must be based on the exact UNS grade, standard, bar form, size, condition, certificates, and destination rather than on an unqualified price per kilogram.
Incoloy 800HT bar is used for high-temperature industrial components that require more than ordinary corrosion resistance. It is commonly selected for furnace equipment, petrochemical processing, thermal treatment systems, reformers, cracking furnaces, heat-treatment fixtures, industrial burners, superheater components, heat exchangers, power-generation equipment, and high-temperature mechanical parts.
When buyers compare Incoloy 800HT bar factory prices, the key issue is whether each quotation covers the same product. A standard hot-rolled bar with mill finish is not the same as a solution-annealed, precision-ground bar supplied with close tolerance, grain-size control, positive material identification, ultrasonic testing, third-party inspection, and export packing. The lowest unit price is only meaningful when the technical scope, documentation, and delivery terms are identical.
INCOLOY is a registered trademark. In purchasing documents, the alloy should also be identified as UNS N08811. Its commonly used European material number is 1.4959. Including these identifiers helps prevent confusion with Alloy 800, UNS N08800, and Alloy 800H, UNS N08810, which belong to the same alloy family but have different chemistry controls and elevated-temperature characteristics.
Incoloy 800HT is a nickel-iron-chromium alloy developed for high-temperature structural applications. It belongs to the Alloy 800 family but includes tightly controlled carbon, aluminum, titanium, and grain-size requirements. These controls improve creep strength, stress-rupture resistance, and structural stability during extended exposure to high temperatures.
Incoloy 800HT bar is supplied as round bar, rod, forged bar, hot-rolled bar, cold-drawn bar, bright bar, flat bar, square bar, or hex bar. It is then machined into components such as furnace fixtures, radiant-tube supports, hangers, manifolds, burner parts, thermowell components, shafts, fasteners, brackets, valve parts, and other engineered equipment exposed to elevated temperature.
| Item | Typical Description |
|---|---|
| Alloy name | Incoloy 800HT, Alloy 800HT |
| UNS designation | N08811 |
| European material number | 1.4959 |
| Alloy family | Nickel-iron-chromium high-temperature alloy |
| Common rod and bar standard | ASTM B408 / ASME SB408 |
| Typical supply forms | Round bar, rod, forged bar, flat bar, square bar, hex bar, bright bar |
The elevated-temperature performance of Incoloy 800HT comes from its nickel-chromium-iron composition and controlled titanium plus aluminum additions. Nickel supports stability in high-temperature environments, chromium improves resistance to oxidation, and iron forms a significant part of the alloy matrix. The controlled carbon content and coarse-grain requirements help the material retain useful creep and stress-rupture properties during prolonged service.
The final chemistry must always be checked against the agreed specification and the mill test certificate for the actual heat. The following composition table is a general purchasing reference.
| Element | Typical Range or Limit, wt.% | Role in the Alloy |
|---|---|---|
| Nickel | 30.0-35.0% | Provides stability and corrosion resistance at elevated temperature. |
| Chromium | 19.0-23.0% | Improves oxidation resistance and resistance to high-temperature gases. |
| Iron | Balance | Forms the main alloy matrix with nickel and chromium. |
| Carbon | 0.06-0.10% | Supports high-temperature creep and stress-rupture properties. |
| Aluminum | 0.25-0.60% | Contributes to elevated-temperature strength and oxidation performance. |
| Titanium | 0.25-0.60% | Works with aluminum to improve high-temperature structural stability. |
| Aluminum plus titanium | 0.85-1.20% | A key controlled range that distinguishes 800HT from related grades. |
| Manganese | 1.50% maximum | Controlled processing and deoxidizing element. |
| Silicon | 1.00% maximum | Controlled within the alloy chemistry. |
| Copper | 0.75% maximum | Restricted as part of composition control. |
Incoloy 800HT is commonly supplied in a high-temperature solution-annealed condition. The heat-treatment condition, grain-size requirement, tensile properties, hardness, and dimensional tolerances should be stated in the purchase order where they are important to the intended service. For high-temperature pressure equipment or long-life furnace components, standard room-temperature data alone is not sufficient for design approval.
Creep is the gradual deformation of a material under a sustained load at elevated temperature. Stress rupture is the eventual failure that may occur after prolonged exposure to stress and heat. Incoloy 800HT is designed with controlled carbon, aluminum, titanium, and grain structure to offer improved resistance to these long-term high-temperature damage mechanisms.
This makes 800HT a suitable candidate for components that carry load or maintain alignment in furnace and petrochemical equipment. Examples include supports, hangers, radiant-tube fixtures, fasteners, high-temperature shafts, brackets, and structural parts where dimensional stability matters during extended service.
At elevated temperatures, some alloys may lose strength, distort, or undergo metallurgical changes that reduce service life. Incoloy 800HT is engineered to maintain useful structural stability under high-temperature exposure. The grain-size and composition controls are especially relevant for equipment that operates continuously or experiences long heating cycles.
Many industrial systems do not operate at one fixed temperature. Furnaces, reformers, burners, heat-treatment equipment, and thermal process units may experience repeated start-up, shutdown, heating, and cooling cycles. Incoloy 800HT can be used where resistance to thermal cycling and high-temperature deformation is important, provided the part design and service conditions are suitable.
| High-Temperature Requirement | Why 800HT Bar May Be Selected |
|---|---|
| Long-term elevated-temperature loading | Controlled chemistry supports creep and stress-rupture resistance. |
| Oxidizing furnace atmosphere | Chromium content helps protect against high-temperature oxidation. |
| Carburizing or nitriding exposure | Useful resistance in suitable high-temperature industrial atmospheres. |
| Thermal cycling | Suitable for components exposed to repeated heating and cooling. |
| High-temperature structural parts | Useful for fixtures, supports, hangers, and machined mechanical components. |
Incoloy 800HT is widely used because it combines high-temperature strength with resistance to oxidation. Chromium contributes to the formation of a protective oxide scale in suitable atmospheres, while the nickel-rich alloy matrix supports stability at elevated temperature. This combination makes the alloy useful in industrial furnace and petrochemical environments where ordinary steels can scale rapidly or lose strength.
The alloy can also offer useful resistance to carburization and nitridation in selected service conditions. These damage mechanisms occur when carbon- or nitrogen-bearing gases penetrate the material at high temperature and alter its structure or properties. The actual performance depends on gas composition, temperature, pressure, oxygen potential, thermal cycling, deposit formation, and duration of exposure.
No material should be selected based only on a published maximum temperature. The appropriate use temperature for an Incoloy 800HT bar component depends on mechanical loading, design code, service life, section thickness, thermal gradients, atmosphere chemistry, and corrosion mechanism. For critical equipment, engineering calculations and approved high-temperature material data should be used.
Incoloy 800HT bar is available in a variety of product forms and dimensions, depending on the manufacturer’s production capability and available stock. Round bar is frequently used for shafts, bolts, pins, valve parts, and turned components. Flat, square, and hex bars are suitable for fasteners, furnace hardware, brackets, fittings, and custom-machined parts.
| Bar Form | Typical Application | Commercial Consideration |
|---|---|---|
| Hot-rolled round bar | General machining and medium-to-large components | Usually economical for standard sizes and normal machining allowance. |
| Forged round bar | Large shafts, heavy fixtures, and critical components | May require longer production time and higher conversion cost. |
| Cold-drawn round bar | Precision shafts, pins, and smaller machined parts | Higher price because of drawing, straightening, and tolerance control. |
| Peeled or turned bar | Components requiring improved surface condition | Includes additional processing and material removal. |
| Ground and polished bar | Close-tolerance parts and high-finish surfaces | Normally carries a premium for precision processing. |
| Flat, square, or hex bar | Fasteners, brackets, fittings, and custom parts | May have more limited stock availability than round bar. |
A precise inquiry should state the bar shape, diameter or section size, required length, diameter tolerance, straightness, surface finish, delivery condition, quantity, and applicable standard. Without these details, suppliers may quote different product conditions that appear similar but are not directly comparable.
Incoloy 800HT bar manufacturing requires controlled melting, hot working, heat treatment, and inspection. The high-temperature performance of the final bar depends on correct chemistry, metallurgical condition, grain structure, and traceability. The production route can vary according to bar size, quantity, required tolerance, and end-use application.
The manufacturer begins with controlled nickel, chromium, iron, titanium, aluminum, carbon, and other alloying additions. Chemistry testing is performed to verify compliance with the grade. The controlled aluminum plus titanium range is particularly important for 800HT, and it should be verified through the mill test certificate.
The alloy billet is converted into bar through hot forging, hot rolling, or a combination of processes. Large diameters may require forging, while common sizes may be hot rolled. Working temperature and reduction practice must be controlled to produce a uniform bar structure suitable for high-temperature service and subsequent machining.
Incoloy 800HT is commonly solution annealed at high temperature to achieve the required metallurgical condition. ASTM B408 includes grain-size requirements for relevant grades and conditions. Where long-term creep performance is important, the buyer should identify any grain-size or heat-treatment requirements in the inquiry rather than assuming that all 800HT bars are equivalent.
Smaller or close-tolerance bars may be further processed by cold drawing, peeling, turning, centerless grinding, polishing, and straightening. These operations improve diameter control, surface condition, roundness, and straightness. They also add conversion cost, inspection time, and lead time.
Incoloy 800HT bar factory price includes the cost of alloy raw materials, melting, hot working, annealing, finishing, inspection, packing, and transport. Two bars of the same nominal diameter can have different prices if their delivery condition, tolerance, test scope, or certificate requirements are different.
| Pricing Factor | Effect on Bar Price |
|---|---|
| Nickel market movement | Influences the main raw-material cost of the alloy. |
| Chromium, titanium, and aluminum cost | Affects alloy surcharge and controlled melting cost. |
| Bar diameter and shape | Determines whether rolling, forging, drawing, or grinding is required. |
| Heat-treatment requirement | Solution annealing and grain-control requirements affect processing cost. |
| Surface finish | Ground, peeled, turned, and bright bars cost more than black hot-rolled bars. |
| Tolerance and straightness | Close dimensions require additional processing and inspection. |
| Testing and documents | PMI, UT, grain-size verification, and third-party inspection increase cost. |
| Order quantity | Larger orders can reduce the unit cost by improving production efficiency. |
| Delivery terms | EXW, FOB, CIF, DAP, and DDP quotes include different logistics responsibilities. |
Nickel is a major cost driver for Incoloy 800HT because it forms approximately one-third of the alloy composition. Chromium, titanium, aluminum, energy, freight, exchange rates, scrap availability, and mill capacity also influence the final factory price. Price movements in these inputs can affect new-production quotes and alloy surcharge calculations.
For larger projects, buyers should ask whether the offered price is fixed for a stated period or subject to raw-material price adjustment. This is especially important for long production schedules, staged deliveries, framework orders, and projects where final purchase approval may take several months.
The London Metal Exchange nickel price is a useful reference for monitoring market movement, but it is not the delivered price of finished Incoloy 800HT bar. Finished bar pricing also includes controlled melting, high-temperature annealing, dimensional processing, testing, packing, financing, and delivery. A professional quotation should clearly state price validity, currency, unit-weight basis, and included services.
Hot-rolled Incoloy 800HT bar is commonly selected for standard sizes and general machining applications. It is often suitable for furnace parts, brackets, supports, larger shafts, and components with sufficient machining allowance. The bar normally has a black or mill-finish surface and standard industrial dimensional tolerance.
Cold-drawn Incoloy 800HT bar is preferred when better diameter accuracy, straightness, surface quality, and reduced machining allowance are required. It can be useful for precision shafts, pins, valve components, fasteners, and instrument parts. Because cold drawing, straightening, and inspection involve additional processing, this bar form generally has a higher price per kilogram.
| Item | Hot-Rolled 800HT Bar | Cold-Drawn or Bright 800HT Bar |
|---|---|---|
| Surface condition | Black or mill finish | Bright, peeled, turned, or improved finish |
| Dimensional tolerance | Standard commercial tolerance | Closer diameter and straightness control |
| Machining allowance | Usually higher | Usually lower |
| Typical application | General machining and larger components | Precision and close-tolerance components |
| Relative price | Usually lower for comparable weight | Usually higher because of additional processing |
Bar diameter is one of the most important pricing factors. Small-diameter precision bar may require multiple cold-drawing passes, straightening, and close measurement. Large-diameter bar may require forging, longer heat-treatment cycles, heavy handling, and additional internal-quality inspection. Standard stocked sizes are often more economical than unusual diameters or special dimensions.
Length can also influence price. Random mill lengths are usually more economical than short fixed cut lengths. When the buyer requires narrow length tolerance, chamfered ends, individual marking, special packing, or pre-cut pieces for immediate machining, the supplier must include cutting, handling, inspection, and potential yield loss in the price.
| Requirement | Potential Cost Effect |
|---|---|
| Small diameter with close tolerance | May require cold drawing, straightening, and extra dimensional inspection. |
| Large forged bar diameter | May require special forging capacity and extended heat treatment. |
| Random mill length | Usually more economical than multiple special cut lengths. |
| Fixed cut length | Adds cutting, handling, inspection, and potential yield loss. |
| High straightness requirement | May require additional straightening and final verification. |
| Ground or polished surface | Requires additional processing and increases unit cost. |
Order quantity affects the price per kg of Incoloy 800HT bar. Small orders are often supplied from distributor or factory stock, which can shorten delivery time but may have a higher unit price. Larger orders can justify new production, allowing the manufacturer to optimize billet size, rolling or forging schedule, heat treatment, inspection, and packing.
There is no single minimum order quantity for 800HT bar. The practical MOQ depends on diameter, product form, available inventory, required tests, production capacity, and whether the supplier can combine the order with a planned production run. Buyers with staged demand should provide the expected total requirement because this can help the manufacturer plan production and offer a more competitive price.
| Order Type | Typical Supply Method | Price and Lead-Time Consideration |
|---|---|---|
| Small urgent order | Distributor or factory stock | Fast delivery may be available, but price per kg can be higher. |
| Standard medium order | Stock or scheduled production | Depends on bar size, condition, and certificate requirements. |
| Large project order | Factory production | Can offer better unit economics when requirements are finalized early. |
| Special size or inspection order | Custom production | May require a longer lead time and higher minimum quantity. |
Factory supply is often the better route for large-volume purchases, custom dimensions, special tolerances, heat-treatment controls, project documentation, and repeat demand. Direct contact with the producer can make it easier to confirm material source, bar manufacturing route, solution-annealing condition, grain-size requirement, inspection scope, packing, and lead time.
Distributor supply is often useful for urgent, small, or standard-size requirements. A distributor may hold stock that is ready to cut and ship, while a factory may require a new production schedule. The buyer should review actual stock availability, heat-number traceability, certificate authenticity, storage condition, and any charges for cutting, testing, or local delivery.
| Supply Route | Best Suited For | Points to Confirm |
|---|---|---|
| Factory direct | Large quantity, special size, custom requirements | MOQ, lead time, manufacturing route, inspection plan, and export terms. |
| Distributor | Small quantity, urgent demand, standard stock sizes | Actual inventory, heat number, certificate, condition, and cut charges. |
| Trader or stockholder | Mixed-material purchasing and smaller orders | Original source, material traceability, documents, and delivery responsibility. |
For high-temperature alloy bar, quality documents are an essential part of the supply. A mill test certificate should identify the heat number, chemical composition, applicable standard, material condition, dimensions, and relevant mechanical test results. The certificate should be traceable to the physical marking or tag on the delivered bar or bundle.
ASTM B408 is commonly used for nickel-iron-chromium alloy rod and bar, including UNS N08811. Depending on the application, the buyer may also require ASME SB408, EN documentation, grain-size verification, positive material identification, ultrasonic testing, hardness testing, tensile testing, third-party inspection, or customer-specific inspection plans.
| Test or Document | Purpose | When Commonly Requested |
|---|---|---|
| EN 10204 3.1 mill test certificate | Provides traceable chemical and material test information. | Standard industrial and export orders. |
| Grain-size verification | Confirms compliance with high-temperature material requirements. | Long-life furnace and elevated-temperature service components. |
| Positive material identification | Confirms material chemistry on supplied bar. | Critical maintenance and mixed-alloy projects. |
| Ultrasonic testing | Checks for internal discontinuities where specified. | Large-diameter or critical mechanical components. |
| Liquid penetrant testing | Checks for surface-breaking defects. | Forged, machined, or high-integrity components. |
| Third-party inspection | Provides independent verification of material and documentation. | Major engineering and project-controlled procurement orders. |
What is the difference between Incoloy 800H and 800HT?
Incoloy 800H and 800HT are both high-temperature variants of Alloy 800, but 800HT has tighter controls on aluminum plus titanium content and is designed for improved elevated-temperature strength and structural stability. Incoloy 800HT is UNS N08811, while Incoloy 800H is UNS N08810. The correct grade should be selected according to service temperature, loading, operating atmosphere, design code, and required creep performance.
What is Incoloy 800HT bar used for?
Incoloy 800HT bar is used for high-temperature industrial components in furnaces, petrochemical plants, reformers, cracking units, heat-treatment equipment, thermal-processing systems, burners, radiant-tube hardware, supports, fasteners, shafts, brackets, and custom-machined equipment parts. It is selected where high-temperature strength, oxidation resistance, and long-term structural stability are important.
What standard applies to Incoloy 800HT bar?
Incoloy 800HT bar is commonly supplied to ASTM B408 or ASME SB408 for nickel-iron-chromium alloy rod and bar, including UNS N08811. Buyers should also state the required delivery condition, bar dimensions, tolerance, grain-size requirement, test scope, certificate type, and any project-specific inspection requirements when requesting a quotation.
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