Alloy 601 - UNS N06601

Alloy 601, UNS N06601, is commonly associated with ASTM B166 - ASTM B168.
Alloy 601 is commonly known as Inconel® 601. Alloy 601 is a Nickel-Chrome alloy developed to be more resistant to high-temperature oxidation than alloy 600.
Mechanical properties here.


Ni Cr C Mn Si S Fe
Max % 63.0 25.0 0.10 1.0 1.0 0.015 Bal
Min % 58.0 21.0

Typical Inventory

Round Bar, Plate, Pipe

Product Description

Nickel-chromium-iron alloy 601, also called Nickel 601, is a general-purpose engineering material for applications that require resistance to heat and corrosion. The outstanding characteristic of alloy 601 is its resistance to high-temperature oxidation. The alloy also has good resistance to aqueous corrosion, has high mechanical strength, and is readily formed, machined, and welded.

The limiting chemical composition of alloy 601 is listed in Table 1. The composition is a face-centered-cubic solid solution with a high degree of metallurgical stability. The alloy’s nickel base, in conjunction with a substantial chromium content, provides resistance to many corrosive media and high-temperature environments. Oxidation resistance is further enhanced by the aluminum content.

General Data

The most important property of Alloy 601 is resistance to oxidation at very high temperatures up to 1250°C. Even under severe conditions such as, cyclical heating and cooling. This is possible due to Alloy 601 having a tightly adherent oxide layer which is resistant against spalling.

  • Resistance to carburization is good, also resistant to cardon nitriding conditions.
  • Due to high chromium and some aluminum content, good resistance in oxidizing sulfur bearing atmospheres at elevated temperatures is demonstrated.
  • Resistant to dry Cl2 to about 1000°F.
  • Oxidation resistance to 2000°F.
  • Carburization resistance.


  • Trays, baskets, and fixtures used in various heat treatments such as carburizing and carbon nitriding.
  • Refractory anchors, strand annealing and radiant tubes, high velocity gas burners, and wire mesh belts.
  • Insulating cans in ammonia reformers and catalyst support grids used in nitric acid production.
  • Thermal reactors in exhaust system of petrol engines.
  • Fabricated combustion chambers.
  • Tube supports and ash trays in the power generation industry.
  • Copper brazing, annealing, and sintering muffles and retorts.
  • Radiant tubes.
  • Strand annealing tubes.
  • Steam superheater tube supports.
  • Rotary kilns and calciners.
  • Thermocouple protection tubes.

Mechanical Properties

The typical properties listed can usually be provided in rounds, sheet, strip, plate, & custom forgings. We have the equipment to produce small quantities in special sizes to meet our customers’ specific needs.

Type Ultimate Tensile (ksi) Yield Strength (ksi) Elong. % in 2 in. Hardness (Rockwell C)
Min Cold worked 80 30 40 60
Max Cold worked 115 60 70 80

Common Specifications

Please, note that the specs listed are for reference and are not comprehensive nor indicative of the actual specifications listed on the Material Test Report (MTR). If you have a special spec requirement, then please reach out to our sales department at 1-800-472-5569.

Form Standard
Metal Type UNS N06601
Bar ASTM B166, DIN 17752
Sheet ASTM B168, DIN 17750
Plate ASTM B168, DIN 17750
Forging Din 17754
Weld Wire FM 82
Weld Electrode FM 617
Din 2.4851


Nickel and cobalt based alloys can be difficult to machinine. However, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. These alloys harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations:

  • CAPACITY - Machine should be rigid and overpowered as much as possible.
  • RIGIDITY - Work piece and tool should be held rigid. Minimize tool overhang.
  • TOOL SHARPNESS - Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.
  • TOOLS - Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.
  • POSITIVE CUTS - Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.
  • LUBRICATION - lubricants are desirable. Soluble oils are recommended especially when using carbide tooling.

Data Sheet

Download our datasheet here

Ulbrich's information on alloy 601

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