ASTM B166 / ASME SB166 | UNS N06601 | Werkstoff Nr. 2.4851 | Sizes 3-500 mm
Inconel 601 Round Bar is the first choice of engineers around the world when extreme heat, corrosion, and mechanical stress combine in the same application environment. This nickel chromium iron aluminium alloy (UNS N06601 / Werkstoff Nr. 6601) is manufactured to ASTM B166 / ASME SB166 standards. The combination of properties achieved in 2.4851 makes it unique in that it combines with other properties that few materials can claim, namely that it retains mechanical integrity at temperatures over 1200°C, has excellent resistance to oxidation and carburization, and has proven to be reliable in industrial service over many decades.
We have established a reputation as the leading supplier and exporter of Inconel 601 round bar in India, maintaining a ready stock of all the standard diameters (3 mm to 500 mm) and a variety of product forms (round bars, hex bars, square bars, flat bars, and forged bars) and providing complete material traceability with EN 10204 3.1 and 3.2 mill test certificates. Our supply chain brings the best of Indian, European, and Japanese mills to our customers across more than 50 countries while maintaining competitive pricing, prompt deliveries, and no compromises on quality.
From chemical composition, mechanical properties, dimensional specifications, and equivalent international grades to applications, prices, and why you can rely on Unifit Fastener as your most reliable supply partner, it's all covered in this comprehensive guide.
Request a QuoteInconel 601 round bar is a nickel-based superalloy with a precisely controlled chemical composition designed for high-temperature industrial service. Unlike plain stainless steels that begin to lose strength and oxidation resistance above 850°C, Inconel 601 maintains its structural integrity and surface stability at temperatures up to 2200°F (1200°C). The alloy achieves this through two mechanisms: the high nickel-chromium matrix provides resistance to a wide range of corrosive environments, while the deliberate addition of 1.0-1.7% aluminium generates a protective, self-healing aluminium oxide (Al2O3) scale that acts as a barrier against oxygen ingress and surface degradation.
Round bars are the most versatile product form of this alloy, used to machine precision components such as shafts, fasteners, valve trim, furnace fixtures, and combustion hardware. Available in both hot-rolled/forged and cold-drawn/bright bar conditions, Inconel 601 Round Bar can be processed by conventional machining centres when the material is in the solution-treated condition.
| Specification Parameter | Details |
| Grade / Alloy | Inconel 601 / UNS N06601 |
| Standard | ASTM B166 / ASME SB166 |
| Specifications | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Diameter Range | 3 mm to 500 mm |
| Length Range | 100 mm to 6000 mm (custom cuts available) |
| Forms Available | Round, Square, Hex, Flat, Rectangle, Wire-mesh, Billet, Ingot, Forging |
| Finish Options | Bright, Polished, Rough Turned, Black, NO.4, Matt, BA Finish |
| Supply State | Pickled & Heat Treated (PH), Hot Treated (H&T), Annealed (ANN) |
| Manufacturing Method | Forged, Rolled, Cold Drawn |
| MTC Certificate | EN 10204 3.1 and 3.2 |
| Origin | Indian, European, Japanese |
| Tolerances | H8 to H13, K9 to K12 |
The chemical composition of Inconel 601 round bar is tightly controlled to ensure consistent high-temperature performance. Nickel and chromium form the backbone of the alloy's corrosion and oxidation resistance, while the aluminium addition is the key differentiator that enables exceptional carburization resistance:
| Element | Ni (Nickel) | Cr (Chromium) | Fe (Iron) | Al (Aluminium) | C (Carbon) | Mn (Manganese) | S (Sulfur) | Si (Silicon) | Cu (Copper) |
| Inconel 601 | 58.0 - 63.0% | 21.0 - 25.0% | Balance | 1.0 - 1.7% | 0.10% max | 1.0% max | 0.015% max | 0.50% max | 1.0% max |
Note: Fe (Iron) content is the balance, with minimum 7.685% by some specifications. The aluminium range of 1.0-1.7% is critical — insufficient Al reduces oxidation resistance, while excess Al can impair ductility and weldability.
The mechanical properties of Inconel 601 round bar are specified for the annealed condition and remain competitive even at elevated service temperatures. The density and thermal properties are particularly relevant for engineering calculations in high-temperature systems:
| Property | Metric | Imperial |
| Density | 8.1 g/cm³ | 0.293 lb/in³ |
| Melting Range | 1360 - 1411 °C | 2480 - 2571 °F |
| Tensile Strength (Min) | 550 MPa | 80,000 psi |
| Yield Strength 0.2% Proof (Min) | 205 MPa | 30,000 psi |
| Elongation (Min, in 50 mm) | 30% | 30% |
| Hardness (HB) | Max 220 | Max 220 |
| Specific Heat (at 21°C) | 448 J/kg.°C | 0.107 Btu/lb.°F |
| Thermal Conductivity (at 100°C) | 12.7 W/m.°C | 87 Btu.in/ft².hr.°F |
| Curie Temperature | < -196 °C | < -320 °F |
Unifit Fastener maintains comprehensive stock of Inconel 601 bars across all standard product forms. Custom sizes, special lengths, and value-added services (cutting, grinding, polishing, certification) are available on request:
| Product Form | Diameter / Width | Length | Surface Finish |
| AMS 5715 Round Bar | 3 - 600 mm | 0.5 - 6.0 m | Black, Pickled, Bright, Polished |
| Alloy 601 Flat Bar | 1.5 - 250 mm (W) | 0.5 - 6.0 m | Polished, Rough Turned, NO.4 |
| Nicr23fe Hex Bar (UNS N06601) | 3 - 180 mm (Inscribed Dia) | 0.5 - 6.0 m | Bright, Black |
| WNR 2.4851 Square Bar | 2 - 200 mm (Side Width) | 0.5 - 6.0 m | Bright, Polished |
Inconel 601 round bars are specified under different designations across international standards. The table below provides a complete cross-reference for engineering specifications, procurement, and import/export documentation:
| Standard | UNS | Werkstoff Nr. | AFNOR | EN | JIS | BS | GOST | OR |
| Inconel 601 | N06601 | 2.4851 | NC23FeA | NiCr23Fe | NCF 601 | NA 49 | XH60BT | EI868 |
Selecting the right Inconel grade requires understanding the performance trade-offs. This comparison highlights why Inconel 601 is specifically preferred for high-temperature oxidation-critical applications, while other grades may be more suitable for different service conditions:
| Property | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 718 |
| UNS Number | N06600 | N06601 | N06625 | N07718 |
| Ni Content | 72% min | 58-63% | 58-63% | 50-55% |
| Cr Content | 14-17% | 21-25% | 20-23% | 17-21% |
| Al Content | < 0.5% | 1.0-1.7% | < 0.4% | 0.2-0.8% |
| Max Temp (Oxidation) | 1150°C | 1200°C | 980°C | 980°C |
| Carburization Resistance | Good | Excellent | Moderate | Moderate |
| High-Temp Strength | Good | Good | Excellent | Excellent |
| Weldability | Good | Good | Excellent | Good |
| Best Application | Chemical processing | Heat treating equipment | Aerospace, Oil & Gas | Aerospace turbines |
Key Insight: If your primary concern is oxidation resistance above 1000°C combined with carburization resistance — for example in heat treatment equipment, furnace parts, or refinery radiant tubes — Inconel 601 round bar is the optimal choice. For ultra-high-strength aerospace applications, Inconel 718 is preferred; for severe aqueous corrosion, Inconel 625 takes precedence.
| Bar Size | Weight (kg/m) | Weight (kg/ft) |
| 10 mm | 0.62 | 0.19 |
| 20 mm | 2.47 | 0.75 |
| 25 mm | 3.87 | 1.18 |
| 30 mm | 5.55 | 1.69 |
| 40 mm | 9.87 | 3.01 |
| 50 mm | 15.41 | 4.70 |
| 60 mm | 22.21 | 6.77 |
| 1" | 3.97 | 1.21 |
| 2" | 15.91 | 4.85 |
| 3" | 35.76 | 10.90 |
| 4" | 63.34 | 19.31 |
| 5" | 99.94 | 30.46 |
| Imperial Size | Weight (kg/m) |
| 1/4" | 0.25 |
| 1/2" | 0.99 |
| 3/4" | 2.24 |
| 1-1/4" | 6.35 |
| 1-1/2" | 8.95 |
| 2-1/2" | 24.86 |
| 2-3/4" | 30.08 |
| 3-1/2" | 48.77 |
| 4-1/2" | 80.34 |
| 6" | 143.90 |
The combination of high-temperature mechanical strength, oxidation resistance, and corrosion resistance makes Inconel 601 Round Bar an indispensable material across a broad spectrum of industries. Below is a detailed breakdown of where and how this alloy delivers unmatched value:
| Industry / Sector | Key Applications |
| Petrochemical & Refinery | Heat exchangers, radiant tubes, cracking furnace components, retort baskets |
| Aerospace & Defence | Combustion liners, engine exhaust systems, thermal shielding, aircraft heating elements |
| Power Generation | Steam generator tubes, boiler components, gas turbine parts, nuclear reactor components |
| Chemical Processing | Chemical reactor vessels, salt bath equipment, chlorination equipment, annealing baskets |
| Heat Treatment Industry | Furnace muffles, radiant tubes, carburizing & nitriding fixtures, trays and baskets |
| Oil & Gas | Downhole tubing, wellhead equipment, flare tips, sour gas service components |
| Industrial Heating | Electric heating element sheaths, thermowells, combustion chamber hardware |
| Pulp & Paper | Digester components, bleaching equipment, pulp cookers, sulphite plant parts |
| Marine & Offshore | Seawater-cooled heat exchangers, offshore platform components, marine hardware |
| Food & Pharmaceutical | High-temperature processing equipment, autoclave components, sterilisation equipment |
Inconel 601 Round Bars sourced and supplied by Unifit Fastener are manufactured through proven industrial processes that ensure consistent mechanical properties and dimensional accuracy:
Every batch of Inconel 601 Round Bar from Unifit Fastener is subject to rigorous quality verification:
The price of Inconel 601 Round Bar depends on several factors including diameter, length, surface finish, certification requirements, and prevailing nickel and chromium commodity prices. The following indicative prices are based on recent market data and are subject to revision:
| Product Description | Price Per Kg (Indicative) | Price Per Ton (Indicative) |
| Inconel 601 Round Bar / Rod | US$ 20 - 70 / kg | US$ 2,200 - 2,600 / ton |
| Inconel 601 Bright Bar (N06601) | US$ 23 - 25 / kg | US$ 2,500 - 45,000 / ton |
| Inconel 601 Flat Bar (ASME SB166) | US$ 15 - 50 / kg | US$ 30,000 / ton |
| Inconel 601 Alloy Steel Round Bar | US$ 1,000 - 5,000 / kg | US$ 1,000 - 5,000 / ton |
| Polished Finish Inconel 601 Rod/Bar | US$ 23 - 25 / kg | On Request |
Note: Prices are indicative and subject to change based on quantity, specification, and market conditions. Contact Unifit Fastener for the latest price list.
Unifit Fastener has served the nickel alloy and specialty steel supply chain since its founding, building deep expertise across the full spectrum of high-performance alloys including Inconel, Hastelloy, Monel, Incoloy, and Duplex/Super Duplex steels. Our team includes certified metallurgists and supply chain specialists with decades of combined experience in sourcing, quality assurance, and international logistics for precision alloy bars and related products.
We are a Mumbai-based company operating with ISO 9001 certification and MSME registration, committed to transparent business practices, on-time delivery, and long-term customer partnerships. Our client base spans petrochemical giants, aerospace OEMs, industrial furnace manufacturers, and EPC contractors across India, the Middle East, Europe, North America, and Southeast Asia.
When you partner with Unifit Fastener, you are not just buying a bar — you are gaining a metallurgical partner accountable for material quality, documentation integrity, and on-time delivery performance at every stage of your project.
Inconel 601 is primarily used in high-temperature applications that require excellent resistance to oxidation and corrosion. It is commonly found in furnace components, heat treatment equipment, petrochemical processing units, thermal processing systems, and power generation facilities.
An Inconel round bar is a solid cylindrical metal bar manufactured from Inconel alloys, which are nickel-chromium-based superalloys. These bars offer outstanding strength, heat resistance, and corrosion resistance, making them suitable for aerospace, marine, chemical, and industrial applications.
Inconel 601 round bar mainly consists of nickel (58-63%), chromium (21-25%), and iron as the balance element. It also contains small amounts of aluminum, carbon, manganese, silicon, sulfur, and copper, which contribute to its excellent oxidation resistance and high-temperature performance.
The main difference between Inconel 600 and Inconel 601 is the addition of aluminum in Inconel 601. This added aluminum significantly improves oxidation resistance at elevated temperatures. While both alloys offer excellent corrosion resistance, Inconel 601 performs better in extreme heat environments, whereas Inconel 600 is widely used for general corrosion and heat-resistant applications.