Introduction

Inconel 601 Alloy (UNS N06601 / W.Nr. 2.4851) is a nickel-chromium alloy with an aluminum addition (approximately 1.4% Al) that provides outstanding oxidation resistance at very high temperatures up to 1250°C (2200°F). This heat resistant alloy 601 forms a tightly adherent oxide scale that resists spalling even under severe thermal cycling conditions. The alloy contains 58–63% nickel, 21–25% chromium, and balance iron, with excellent carburization resistance and higher mechanical properties at elevated temperatures than Inconel 600. This high temperature Inconel 601 is the preferred material for industrial furnaces, heat treatment equipment, radiant tubes, petrochemical processing, gas turbine components, and thermal processing applications. Available in Inconel 601 plate, sheet, strip, seamless pipe, tube, bar, round bar, rod, wire, forgings, flanges, fittings, and fasteners, in hot rolled, cold rolled, cold drawn, annealed, and solution annealed conditions.

Chemical components 

Mechanical properties

Physical properties

Inconel 601 Available Products and Standard

1. GB/T 15007 (Nickel and Nickel Alloy Plate, Strip, and Foil)

Type: Sheet / Plate / Strip / Wire / Tube / Bar

Size Range:

• Inconel Alloy 601 Wire: 0.1 – 15.0 mm dia

• Inconel Alloy 601 Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide

• Inconel Alloy 601 Round Bar: 8 – 355 mm dia

• Inconel Alloy 601 Sheet / Plate: 0.5 – 180 mm thick

• Inconel Alloy 601 Seamless Tube / Pipe: Custom sizes available

Surface: Annealed, Bright, Pickled, Ground

Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, intergranular corrosion test, dimensional inspection

2. ASTM B168 (Standard Specification for Nickel-Chromium Alloy Plate, Sheet, and Strip)

Grade: UNS N06601 / Inconel 601 / Alloy 601

Type: Sheet / Plate / Strip

Size Range:

• Inconel Alloy 601 Sheet / Plate: 0.5 – 180 mm thick (hot rolled or cold rolled)

• Inconel Alloy 601 Strip: 0.05 – 5.0 mm thick × up to 500 mm wide (coils)

Surface: Annealed, Pickled, Bright, Polished

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, intergranular corrosion test, dimensional inspection

3. ASTM B166 (Standard Specification for Nickel-Chromium Alloy Rod and Bar)

Grade: UNS N06601 / Inconel 601 / Alloy 601

Type: Round Bar / Rod / Wire

Size Range:

• Inconel Alloy 601 Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)

• Inconel Alloy 601 Wire: 0.1 – 15.0 mm dia (coils or straight)

Surface: Annealed, Pickled, Ground, Turned, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, ultrasonic test, dimensional inspection

4. ASTM B167 (Standard Specification for Nickel-Chromium Alloy Seamless Pipe and Tube)

Grade: UNS N06601 / Inconel 601 / Alloy 601

Type: Seamless Pipe / Seamless Tube

Size Range:

• Inconel Alloy 601 Seamless Pipe: 6 – 610 mm OD × 1 – 50 mm wall thickness

• Inconel Alloy 601 Seamless Tube: Custom sizes

Surface: Annealed, Pickled, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hydrostatic test, eddy current test, dimensional inspection

5. ASTM B564 (Standard Specification for Nickel Alloy Forgings)

Grade: UNS N06601 / Inconel 601 / Alloy 601

Type: Forging / Forged Ring / Flange / Fitting

Size Range: Custom sizes available

Surface: Annealed, Pickled, Ground, Turned

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, ultrasonic test, dimensional inspection

Applications

1. Industrial Furnaces & Radiant Tubes

• For industrial furnace radiant tubes, muffles, retorts, and furnace roller rails operating at sustained high temperatures, Inconel 601 for furnace equipment delivers outstanding oxidation resistance and scaling resistance even under severe thermal cycling conditions. The alloy's tightly adherent oxide scale resists spalling during rapid heating and cooling cycles.

• For radiant tubes in gas‑fired and electrically heated furnaces, Alloy 601 seamless pipe and tube maintain structural integrity at temperatures up to 1250°C while resisting carburization and thermal fatigue. The high temperature Inconel 601 provides longer service life than Inconel 600 in cyclic thermal service.

• For heat treatment baskets, fixtures, and conveyor systems, Inconel 601 sheet and plate are fabricated into complex shapes with excellent formability and weldability.

2. Heat Treatment Equipment & Thermal Processing

• For heat treatment equipment including baskets, muffles, retorts, and thermocouple protection tubes, Inconel 601 for heat treatment provides the combination of heat resistant performance and mechanical stability during long‑term thermal operation. The alloy resists carburization, oxidation, and nitridation in furnace atmospheres.

• For thermal processing equipment in annealing, hardening, and brazing operations, UNS N06601 tube withstands repeated thermal cycling while maintaining mechanical strength. Inconel 601 wire is used for furnace heating elements and thermocouple sheaths.

3. Petrochemical Processing & Chemical Industry

• For petrochemical processing equipment including preheaters in high‑density polyethylene production and transfer line exchangers, Inconel 601 for petrochemical industry resists oxidation and high‑temperature corrosion in aggressive process environments.

• For chemical processing reactors, heat exchangers, and piping systems handling corrosive media at elevated temperatures, Alloy 601 pipe and tube provide good aqueous corrosion resistance combined with high‑temperature strength.

• For pollution control applications including thermal reactors in gasoline engine exhaust systems and combustion chambers in solid‑waste incinerators, Inconel 601 delivers reliable performance in high‑temperature corrosive environments.

4. Gas Turbine & Power Generation

• For gas turbine components including combustor liners, transition ducts, and turbine shrouds, Inconel 601 for power generation offers excellent oxidation resistance and maintains high mechanical properties at elevated temperatures.

• For power generation equipment and industrial gas turbines, UNS N06601 bar and round bar are machined into precision components requiring high‑temperature strength and durability.

5. Aerospace & High Temperature Static Applications

• For aerospace components including aircraft engine exhaust systems and high‑temperature ducting, Inconel 601 provides the oxidation resistance and thermal stability required for critical flight components.

• For high temperature static applications including oxygen sensor protective shields, Inconel 601 ensures dependable long‑term performance in high‑temperature service.

FAQ – Inconel 601 Alloy

Q: What is the difference between Inconel 600 and Inconel 601?

A: Inconel 601 alloy (UNS N06601) contains more chromium (21–25%) with an aluminum addition (approximately 1.4%) that provides superior oxidation resistance up to 1250°C (2200°F), whereas Inconel 600 has lower chromium (14–17%) and no aluminum. Inconel 601 offers higher mechanical properties at elevated temperatures and better scaling resistance under thermal cycling conditions. Inconel 600 remains the choice for broad aqueous corrosion resistance; Inconel 601 is the oxidation resistant nickel alloy for high‑temperature furnace and thermal processing applications.

Q: What is the maximum operating temperature for Inconel 601?

A: Inconel 601 alloy is suitable for continuous service up to 1250°C (2200°F). It forms a dense, adherent oxide scale that resists spalling even under severe thermal cycling conditions. The alloy provides excellent oxidation resistance in the 1000–1200°C temperature range. For service above 1100°C, the grain‑controlled version 601GC may be considered for improved grain growth resistance.

Q: Can Inconel 601 be welded without post‑weld heat treatment?

A: Yes. Inconel 601 can be welded using TIG, MIG, and other standard processes. The alloy is readily welded and formed, and post‑weld heat treatment is generally not required for most applications. The nickel chromium alloy 601 maintains its corrosion resistance and mechanical properties in the as‑welded condition.

Q: What industries commonly use Inconel 601?

A: Industrial furnaces and heat treatment equipment (radiant tubes, muffles, retorts, baskets), petrochemical processing (preheaters, transfer line exchangers), gas turbine components, pollution control (thermal reactors, incinerator combustion chambers), chemical processing, aerospace, and power generation. This heat resistant alloy 601 is the material of choice for applications requiring oxidation resistance at extreme temperatures.

We are a trusted Inconel 601 Supplier and Inconel 601 Manufacturer, China‑based, serving industrial furnace builders, heat treatment equipment manufacturers, petrochemical processors, and gas turbine component suppliers worldwide. All products comply with ASTM B168 / ASTM B167 / ASTM B166 / ASME SB168 with EN 10204 3.1 mill certificates, PMI verification, and dimensional inspection reports. We offer Inconel 601 plate, sheet, seamless pipe, tube, bar, round bar, rod, wire, forgings, flanges, fittings, and fasteners in custom sizes, with cut‑to‑size, precision machining, and solution annealing services. Contact us at info@monokj.com for size chart, pricing, or custom requirements.