Incoloy 20 round bar price per kg depends on the alloy composition, bar size, manufacturing method, surface finish, tolerance, certificates, inspection scope, quantity, and delivery terms. Also known as Alloy 20 or UNS N08020, this nickel-iron-chromium alloy is widely selected for sulfuric acid and chemical-process applications where standard stainless steel may not provide sufficient corrosion resistance. A reliable supplier should quote against a complete technical requirement rather than provide a generic price per kilogram with no stated material condition or quality scope.
Incoloy 20 round bar is a corrosion-resistant nickel alloy bar used for chemical processing, acid handling, pumps, valves, shafts, fasteners, fittings, and custom-machined components. The alloy contains nickel, chromium, molybdenum, copper, and niobium additions that give it a useful balance of resistance to sulfuric acid, phosphoric acid, nitric acid, chlorides, and other aggressive chemical environments.
Because Alloy 20 is a specialty material rather than a standard stainless-steel grade, its price per kg can vary considerably between suppliers. A basic hot-rolled bar from stock is not equivalent to a close-tolerance, solution-annealed, ground bar supplied with positive material identification, ultrasonic testing, third-party inspection, and export packing. Buyers should compare the total technical scope before comparing the unit price.
INCOLOY is a registered trademark. In purchase inquiries and technical documents, the material should also be identified by its UNS number, N08020. It may also be referred to commercially as Alloy 20, 20Cb-3, or Incoloy alloy 020. The alloy designation, applicable standard, dimensions, delivery condition, and certificate requirements should be clearly stated in the order.
Incoloy 20 is a nickel-iron-chromium alloy developed for corrosion resistance in demanding chemical environments. It is particularly well known for sulfuric acid service, where conventional stainless steels can suffer rapid general corrosion, pitting, crevice attack, or stress corrosion cracking. The alloy combines nickel for corrosion resistance, chromium for oxidizing conditions, molybdenum for localized corrosion resistance, and copper for improved performance in sulfuric acid environments.
Incoloy 20 round bar is commonly machined into valve stems, pump shafts, impellers, fasteners, couplings, agitator parts, connectors, instrument components, nozzles, flanges, and other process-equipment parts. The bar may be supplied as hot rolled, forged, cold drawn, peeled, turned, centerless ground, or polished stock according to the buyer’s machining and dimensional requirements.
| Item | Typical Description |
|---|---|
| Commercial name | Incoloy 20, Alloy 20, 20Cb-3, Incoloy alloy 020 |
| UNS designation | N08020 |
| European material number | 2.4660 |
| Material family | Nickel-iron-chromium-molybdenum-copper corrosion-resistant alloy |
| Common bar standard | ASTM B473 / ASME SB473 |
| Typical supply forms | Round bar, rod, forged bar, flat bar, square bar, hex bar, bright bar |
The performance of Incoloy 20 round bar comes from its controlled chemical composition. Nickel forms the corrosion-resistant base of the alloy, chromium improves resistance in oxidizing environments, molybdenum supports resistance to localized corrosion, and copper improves performance in sulfuric acid. Niobium helps stabilize the alloy and supports fabrication performance when material is exposed to welding or thermal cycles.
The actual chemistry of each bar heat must be verified using the mill test certificate and the applicable ASTM, ASME, EN, or project specification. The table below is intended as a practical overview for purchasing communication.
| Element | Typical Range or Limit, wt.% | Main Function |
|---|---|---|
| Nickel | 32.0-38.0% | Provides the alloy’s corrosion-resistant base structure. |
| Chromium | 19.0-21.0% | Improves resistance in oxidizing chemical environments. |
| Iron | Balance | Forms part of the nickel-iron-chromium alloy matrix. |
| Copper | 3.0-4.0% | Improves resistance in sulfuric acid service. |
| Molybdenum | 2.0-3.0% | Supports resistance to pitting and crevice corrosion. |
| Manganese | 2.0% maximum | Controlled processing and deoxidizing element. |
| Silicon | 1.0% maximum | Controlled within the specified chemistry range. |
| Carbon | 0.07% maximum | Controlled to support material stability and fabrication performance. |
| Niobium plus tantalum | Controlled in relation to carbon, up to 1.0% maximum | Helps stabilize the alloy. |
Incoloy 20 is generally valued for corrosion resistance rather than extreme high-temperature strength. It has good mechanical properties and can be fabricated and machined using methods suitable for nickel alloys. The required material condition should be identified in the inquiry, especially when the bar will be machined into pressure-retaining parts, rotating equipment components, or corrosion-critical fasteners.
Alloy 20 is frequently chosen for sulfuric acid handling because its nickel, chromium, molybdenum, and copper combination provides strong corrosion resistance across many sulfuric acid conditions. It is often used where 316L stainless steel does not offer sufficient service life. The exact alloy selection should still consider acid concentration, operating temperature, contaminants, flow velocity, aeration, and the presence of oxidizing or reducing conditions.
Chemical-process streams are often more complicated than a single pure acid. Chlorides, fluorides, sulfur compounds, oxidizing salts, process impurities, and stagnant areas can change corrosion behavior significantly. Incoloy 20 provides useful resistance in many mixed acid and chemical-processing environments, making it a practical material for components exposed to variable process conditions.
Pitting and crevice corrosion can occur beneath deposits, gaskets, seals, threaded areas, stagnant liquid, and poorly drained equipment zones. The molybdenum and nickel content of Alloy 20 helps improve resistance to these localized forms of attack compared with many conventional stainless steels. Final material selection should take account of actual chloride content and component geometry.
Incoloy 20 round bars can be forged, hot worked, cold worked, welded, and machined using suitable nickel-alloy procedures. The alloy work-hardens more rapidly than carbon steel, so correct machining speed, tool rigidity, feed rate, coolant use, and tool condition are important. A supplier can provide different bar finishes to help reduce machining allowance and improve productivity.
| Property | Why It Matters |
|---|---|
| Sulfuric acid resistance | Useful for acid-processing equipment and corrosion-critical components. |
| Chromium content | Supports resistance in oxidizing chemical environments. |
| Copper addition | Improves performance in sulfuric acid service. |
| Molybdenum addition | Helps resist localized corrosion in chloride-bearing conditions. |
| Niobium stabilization | Supports alloy stability during fabrication and thermal exposure. |
| Fabricability | Allows machining, welding, and production of custom equipment parts. |
Sulfuric acid is one of the most important reasons for choosing Incoloy 20 round bar. The acid’s corrosion behavior changes with concentration and temperature, and the presence of impurities can make the environment either more or less aggressive. Chlorides, ferric ions, oxidizing contaminants, reducing contaminants, dissolved metals, and acid velocity can all influence the corrosion rate.
Incoloy 20 is commonly selected for sulfuric acid pumps, valves, heat exchangers, storage equipment, acid-transfer systems, pickling equipment, chemical reactors, and fasteners. It can also be considered for phosphoric acid, nitric acid, process streams containing chlorides, and other chemical environments where a balance of oxidizing and reducing acid resistance is required.
However, no alloy should be selected only by name. A reliable material supplier can provide the bar, but the final engineering decision should be based on the actual process conditions. The buyer should provide chemical concentration, maximum and minimum temperature, operating pressure, contaminants, flow conditions, cleaning cycles, expected service life, and any history of corrosion failure when requesting technical support.
| Service Environment | Why Alloy 20 May Be Considered |
|---|---|
| Sulfuric acid systems | Strong resistance in many sulfuric acid concentrations and process conditions. |
| Phosphoric acid processing | Useful for selected acid-handling equipment and components. |
| Nitric acid service | Chromium content supports resistance in suitable oxidizing acid conditions. |
| Chloride-bearing streams | Molybdenum and nickel help reduce the risk of localized corrosion. |
| Mixed chemical streams | Offers a practical balance for complex chemical-process environments. |
| Stress corrosion concerns | Can offer better resistance than many common austenitic stainless steels. |
Incoloy 20 round bars can be supplied in a wide range of diameters and lengths, subject to mill capability and stock availability. Small-diameter bars are commonly used for fasteners, pins, instrument parts, and small valve components. Medium and large diameters are typically machined into shafts, pump parts, flanges, fittings, couplings, and custom corrosion-resistant mechanical components.
For purchasing purposes, buyers should specify the nominal diameter, diameter tolerance, required length, length tolerance, straightness, ovality, surface finish, delivery condition, and quantity. These details affect both factory price and whether the material should be supplied from stock or manufactured to order.
| Bar Type | Typical Use | Price Consideration |
|---|---|---|
| Hot-rolled round bar | General machining and standard components | Often economical for common diameters and normal tolerances. |
| Forged round bar | Large shafts, pump components, heavy machined parts | May require more conversion time and higher processing cost. |
| Cold-drawn round bar | Precision shafts, pins, fasteners, instrument components | Higher cost due to drawing, straightening, and tighter control. |
| Peeled or turned bar | Components requiring better surface quality | Includes extra processing and metal removal. |
| Ground and polished bar | Close-tolerance or high-finish parts | Usually carries a premium for precision finishing. |
| Flat, square, or hex bar | Fasteners, fittings, blocks, and custom-machined parts | May have more limited stock availability than round bar. |
The manufacturing route for Incoloy 20 round bar affects material quality, lead time, and price per kg. Nickel alloy bar production normally includes controlled melting, chemistry analysis, billet production, hot working, annealing, finishing, inspection, marking, and packing. The exact process depends on bar diameter, required condition, tolerance, and quantity.
Production starts with controlled melting of nickel, chromium, iron, copper, molybdenum, niobium, and other required alloying elements. Chemistry is tested to ensure compliance with the specified grade. The heat number should remain traceable from the initial melt through forging, rolling, cutting, inspection, and shipment.
The alloy billet may be forged or hot rolled into round bar. Large diameters are often produced through forging, while standard sizes may be hot rolled. The manufacturer must control working temperature, reduction ratio, cooling method, and heat-treatment cycle to produce a sound bar suitable for corrosion service and machining.
After hot working, the bar may be annealed or solution annealed according to the agreed delivery condition. Additional operations may include cold drawing, peeling, turning, centerless grinding, polishing, straightening, and cut-to-length processing. These value-added services improve dimensional accuracy and surface quality but increase the final price per kilogram.
Final inspection may include chemical analysis, tensile testing, hardness testing, visual inspection, dimensional inspection, positive material identification, ultrasonic testing, liquid penetrant testing, or third-party inspection. Export orders may require bundled packing, moisture protection, steel strapping, pallets, plywood cases, and individual bar tags.
Incoloy 20 round bar price per kg is made up of alloy raw-material cost, melting cost, hot-working cost, finishing cost, quality-control cost, packing cost, and logistics cost. Two bars with the same nominal diameter may have different prices if one is supplied in basic mill finish and the other is supplied with a precision-ground surface, close tolerance, and special inspection reports.
| Pricing Factor | Effect on Quotation |
|---|---|
| Nickel market movement | Influences the base raw-material cost of the alloy. |
| Chromium, molybdenum, and copper cost | Affects alloy surcharge and melting cost. |
| Bar diameter | Influences manufacturing route, yield, handling, and finishing needs. |
| Length and cut-length requirement | Special lengths add cutting, handling, and potential yield-loss cost. |
| Surface finish | Bright, peeled, turned, and ground bars are priced above black hot-rolled bars. |
| Tolerance and straightness | Close dimensional requirements require additional processing and inspection. |
| Order quantity | Larger orders may reduce unit cost through better production efficiency. |
| Material testing | PMI, UT, third-party inspection, and special reports add cost and lead time. |
| Delivery term | EXW, FOB, CIF, DAP, and DDP quotations include different logistics scopes. |
Nickel is the principal market reference for Incoloy 20 because it is a major component of the alloy. Chromium, molybdenum, copper, niobium, energy, freight, exchange rates, and scrap availability also affect the finished bar price. A factory may adjust new-production quotations when these inputs change, while in-stock material may be priced according to the supplier’s inventory cost and stock policy.
For project orders and long lead-time purchases, buyers should ask whether the price is fixed for a defined quotation-validity period or subject to a metal surcharge mechanism. This is important when a project requires staged deliveries or when there may be a long delay between the quotation date and purchase-order release.
The London Metal Exchange nickel price is useful for following general nickel market conditions, but it is not the finished price of Incoloy 20 round bar. A finished bar quotation also includes alloy additions, melting, heat treatment, processing, inspection, documentation, packing, financing, and transport. The quotation should state its currency, validity, delivery term, and included services.
Hot-rolled Incoloy 20 round bar is generally selected when the buyer requires standard dimensions and will perform machining after receipt. It is often a cost-effective option for larger components or parts with adequate machining allowance. The surface is usually black or mill finish, and tolerance is normally suited to general industrial machining.
Cold-drawn Incoloy 20 bar is processed for improved diameter control, surface quality, roundness, and straightness. It is useful for precision shafts, valve stems, pins, fasteners, and instrument components. The additional drawing, straightening, and inspection operations generally increase the factory price per kilogram compared with a comparable hot-rolled bar.
| Item | Hot-Rolled Bar | Cold-Drawn or Bright Bar |
|---|---|---|
| Surface condition | Black or mill finish | Bright, peeled, turned, or improved finish |
| Dimensional tolerance | Standard commercial tolerance | Closer tolerance and improved straightness |
| Machining allowance | Usually higher | Usually lower |
| Typical use | General machining and larger components | Precision shafts, pins, and close-tolerance parts |
| Relative price per kg | Generally lower for comparable weight | Generally higher due to extra processing |
Diameter, length, and tolerance can significantly change the price of Incoloy 20 round bar. Small-diameter bright bars may require multiple drawing passes, straightening, and detailed measurement. Large-diameter bars may require forging, longer heat-treatment cycles, special handling, and more extensive internal-quality controls. Standard stocked dimensions are often more economical than unusual sizes.
Random mill lengths usually cost less than exact cut lengths. A buyer requesting many short pieces, strict length tolerance, chamfered ends, individual marking, special wrapping, or custom packing should expect additional processing charges. When possible, accepting random lengths and performing final cutting locally can reduce procurement cost.
| Requirement | Possible Price Effect |
|---|---|
| Small diameter with close tolerance | May require cold drawing, straightening, and detailed dimensional inspection. |
| Large forged diameter | May require special forging capacity and extended heat treatment. |
| Random length | Usually more economical than multiple special cut lengths. |
| Fixed length with close tolerance | Adds cutting, inspection, handling, and potential yield-loss cost. |
| High straightness requirement | May require additional straightening and final verification. |
| Ground or polished finish | Requires extra surface processing and increases unit cost. |
Factory-direct purchasing is often suitable for large quantities, custom dimensions, special tolerances, project documentation, and repeat orders. It allows the buyer to communicate directly with the production side about material route, heat treatment, inspection requirements, packaging, and delivery schedule. However, a factory may require a minimum order quantity or a production lead time for non-stock dimensions.
A supplier or distributor can be a better choice for urgent requirements, small quantities, mixed material orders, and common stock sizes. Distributors may hold ready inventory and can often provide local cutting or faster delivery. Buyers should still verify the original material source, heat number, certificate, storage condition, and whether the bar has been further processed or repacked.
| Supply Route | Best Suited For | Key Points to Review |
|---|---|---|
| Factory direct | Large orders, special size, custom finish, project requirements | MOQ, manufacturing schedule, technical scope, inspection plan, export terms. |
| Supplier or distributor | Urgent demand and standard stock sizes | Actual inventory, heat number, certificate, storage condition, cut charges. |
| Trader or stockholder | Small quantity and mixed-material purchasing | Material origin, documentation, traceability, and delivery responsibility. |
Material certificates are a critical part of Incoloy 20 round bar supply. A mill test certificate should identify the heat number, chemical composition, applicable specification, material condition, dimensions, and relevant mechanical test results. The physical bar or bundle should be marked or tagged so it can be traced back to the certificate.
ASTM B473 is commonly referenced for UNS N08020 nickel-iron-chromium-molybdenum-copper alloy bar and wire. Depending on the application, the buyer may also require ASME SB473, EN documentation, project specifications, pressure-equipment records, or customer-specific inspection plans.
| Document or Test | Purpose | When It Is Commonly Requested |
|---|---|---|
| EN 10204 3.1 mill test certificate | Provides heat-traceable material test information. | Standard industrial and export orders. |
| Positive material identification | Confirms the supplied material chemistry. | Critical maintenance and mixed-alloy projects. |
| Ultrasonic testing | Checks for internal discontinuities where required. | Large diameter and critical mechanical components. |
| Liquid penetrant testing | Checks for surface-breaking defects. | Forged, machined, or high-integrity components. |
| Third-party inspection | Provides independent witness or verification. | Major project and client-controlled procurement orders. |
| Dimensional inspection report | Confirms diameter, length, tolerance, and straightness. | Precision bar and drawing-controlled parts. |
A reliable Incoloy 20 round bar supplier should provide more than a low price. The supplier should understand the difference between alloy grade, product standard, delivery condition, material traceability, surface finish, and corrosion-service suitability. It should also be transparent about whether it is the original producer, a processor, a stockholder, or a trading company.
Ask for a sample mill test certificate or a redacted example of previous documentation. The certificate should clearly show the heat number, chemistry, specification reference, testing information, and material condition. The heat number on the certificate should correspond with the marking on the delivered bar or bundle.
A supplier should be able to confirm whether the requested Incoloy 20 bar is available from stock or needs new production. For special sizes, ask whether the material will be hot rolled, forged, cold drawn, peeled, or ground. This affects price, lead time, dimensional capability, and suitable machining allowance.
When comparing supplier offers, confirm that every quote covers the same alloy designation, bar dimensions, tolerance, delivery condition, test scope, certificate type, packing method, unit-weight basis, lead time, and Incoterm. A lower price can become more expensive if it excludes required inspection, heat treatment, special packing, or delivery charges.
Nickel alloy prices can change with raw-material costs and production availability. The quotation should clearly state its validity period, payment terms, production lead time, and delivery point. For project orders, it is useful to clarify whether the lead time starts from order confirmation, deposit receipt, technical approval, raw-material availability, or completion of third-party inspection.
What is Incoloy 20 round bar used for?
Incoloy 20 round bar is used to manufacture corrosion-resistant components for sulfuric acid systems, chemical processing equipment, pumps, valves, shafts, fasteners, fittings, heat exchangers, reactors, pickling equipment, and acid-handling machinery. It is particularly valued where standard stainless steel does not provide adequate resistance to sulfuric acid or mixed chemical environments.
What is the UNS number for Incoloy 20?
The UNS designation for Incoloy 20, also called Alloy 20 or 20Cb-3, is N08020. It may also be referenced by the European material number 2.4660. The purchase order should state UNS N08020 together with the required product standard, bar size, condition, tolerance, and inspection scope.
What standard applies to Alloy 20 round bar?
Alloy 20 round bar is commonly supplied to ASTM B473 or ASME SB473 for UNS N08020 nickel-iron-chromium-molybdenum-copper alloy bar and wire. Buyers should confirm the required revision, material condition, dimensions, testing, certificates, and any project-specific requirements before production or shipment.
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