What Is Inconel 600? Alloy 600, UNS N06600 & 2.4816 Explained

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What Is Inconel 600?

Inconel 600 is a nickel-chromium-iron alloy developed for engineering applications requiring a combination of corrosion resistance, heat resistance, mechanical strength and good fabricability.

It is commonly identified by the following designations:

DesignationIdentification
Inconel 600Commercial alloy name
Alloy 600Alternate name
UNS N06600UNS designation
W.Nr. 2.4816Werkstoff number
NiCr15FeCommon European-style designation
ASTM B166Rod, bar and wire specification
ASTM B167Seamless pipe and tube specification
ASTM B168Plate, sheet and strip specification

Special Metals identifies INCONEL alloy 600 as UNS N06600 / W.Nr. 2.4816 and describes it as a standard engineering material for applications requiring resistance to corrosion and heat.

This makes Inconel 600 relevant to industries where conventional stainless steels may not provide the required combination of corrosion and high-temperature performance.

Inconel 600: Understanding the Material

Inconel 600 belongs to the nickel-chromium-iron alloy family.

Its chemistry is built around a high nickel content with chromium and iron as major alloying elements.

The material is not a precipitation-hardening alloy.

Instead, Inconel 600 is strengthened through its alloy chemistry and can obtain higher strength through cold working.

This is an important distinction when comparing Inconel 600 with precipitation-hardenable alloys such as certain other nickel alloys.

According to Special Metals, Inconel 600 has excellent mechanical properties and a useful combination of high strength and good workability.

Inconel 600 Chemical Composition

The alloy’s composition is one of the main reasons for its corrosion and heat-resistant performance.

A published limiting composition from Special Metals is:

ElementComposition
Nickel + Cobalt72.0% min.
Chromium14.0–17.0%
Iron6.0–10.0%
Carbon0.15% max.
Manganese1.00% max.
Sulfur0.015% max.
Silicon0.50% max.
Copper0.50% max.

The exact chemical requirements should always be checked against the applicable product specification and the material certificate for the supplied heat.

Why Does Inconel 600 Have High Nickel Content?

Nickel is the principal element in Inconel 600.

The high nickel content contributes to the alloy’s resistance to a wide range of organic and inorganic environments.

Special Metals notes that the nickel content also gives Inconel 600 strong resistance to chloride-ion stress-corrosion cracking under many conditions.

This makes nickel an important part of the alloy’s performance in chemical-processing and other demanding environments.

What Does Chromium Do in Inconel 600?

Chromium contributes to the alloy’s resistance to oxidation and certain corrosive environments.

According to Special Metals, chromium provides resistance to sulfur compounds and contributes to oxidation resistance at elevated temperatures and in corrosive solutions.

The combination of nickel and chromium is therefore central to the performance of Inconel 600.

Is Inconel 600 a Nickel Alloy?

Yes.

Inconel 600 is a nickel-chromium-iron alloy, with nickel forming the majority of the alloy composition.

This differentiates it from conventional stainless steels, even though both material families can be selected for corrosion-resistant applications.

Inconel 600 is generally considered when the engineering requirement demands the characteristics of a nickel-based alloy.

Is Inconel 600 a Stainless Steel?

No.

Inconel 600 is not a conventional stainless steel grade.

It is a nickel-based alloy containing chromium and iron.

The material is specifically engineered for corrosion and heat-resistant applications where nickel-alloy performance is required.

For procurement, it is therefore important to specify:

Inconel 600 / UNS N06600

rather than simply requesting a generic stainless-steel bar.

Inconel 600 Properties

Inconel 600 is known for a combination of:

  • Corrosion resistance
  • Oxidation resistance
  • High-temperature capability
  • Good mechanical properties
  • Good fabricability
  • Good weldability with appropriate procedures
  • Resistance to chloride-ion stress-corrosion cracking under suitable conditions
  • Good performance across a broad temperature range

Special Metals reports that the alloy has applications ranging from cryogenic temperatures to above 1095°C (2000°F), although the appropriate service limit depends on the application, environment, loading and design requirements.

Is Inconel 600 Precipitation Hardenable?

No.

Inconel 600 is not precipitation hardenable.

Special Metals states that the alloy is hardened and strengthened by cold work rather than precipitation hardening.

This is an important technical distinction for engineers specifying the material.

The mechanical properties of Inconel 600 can vary considerably according to:

  • Product form
  • Annealed condition
  • Cold-worked condition
  • Manufacturing process
  • Section size
  • Applicable specification

Therefore, published typical values should not automatically be treated as specification limits.

Inconel 600 Mechanical Properties

The mechanical properties of Inconel 600 depend strongly on the supplied condition.

In the annealed condition, Special Metals reports nominal yield strengths in the range of approximately 172–345 MPa, with relatively high elongation.

Heavily cold-worked material can reach substantially higher tensile strength, with the referenced technical bulletin reporting values up to approximately 1517 MPa for heavily cold-worked material.

This illustrates why a buyer should specify the required material condition when purchasing Inconel 600.

ConditionGeneral Characteristic
AnnealedBetter ductility and fabricability
Cold workedHigher strength and hardness
Heavily cold workedVery high strength possible
Specification conditionMust meet applicable standard

For design purposes, the applicable material specification and certified test results should take precedence over generic online property tables.

Inconel 600 Round Bar

Inconel 600 Round Bar is a commonly requested product form for machining industrial components.

Round bar can be processed into components such as:

  • Shafts
  • Pins
  • Fasteners
  • Furnace components
  • Machined fittings
  • Chemical-processing components
  • High-temperature engineering parts
  • Special-purpose industrial components

ASTM B166 covers nickel-chromium-iron alloys including UNS N06600 in hot-finished and cold-worked rounds, squares, hexagons, rectangles and cold-worked wire.

For procurement, buyers should identify the required diameter, length, condition and applicable standard.

Inconel 600 Applications

The combination of corrosion resistance and heat resistance makes Inconel 600 useful across several industries.

Chemical Processing

Inconel 600 is used in chemical-processing equipment requiring resistance to corrosive environments.

Applications reported by Special Metals include heaters, stills, bubble towers, condensers, evaporator components and equipment associated with chemical and paper-pulp processing.

Heat Treatment Equipment

The alloy’s high-temperature characteristics make it useful for furnace equipment.

Applications include:

  • Retorts
  • Muffles
  • Roller hearths
  • Heat-treatment baskets
  • Furnace trays

Special Metals specifically identifies Inconel 600 among alloys used for thermal-processing equipment.

Aerospace

Inconel 600 has been used for selected aerospace components exposed to high temperatures.

Examples identified by Special Metals include:

  • Lockwire
  • Exhaust liners
  • Turbine seals
  • Engine-related components

Nuclear Engineering

Inconel 600 has also been used in nuclear-reactor applications, including components exposed to high-purity water environments.

Special Metals identifies the alloy as a standard material of construction for nuclear reactors and notes a specialized designation, INCONEL alloy 600T, for nuclear applications.

Petrochemical Processing

Inconel 600 is among the nickel alloys used in petrochemical-processing environments.

Applications can involve vessels, reactors, heat exchangers, process equipment and high-temperature components depending on the service conditions.

Inconel 600 Temperature Capability

One of the reasons engineers consider Inconel 600 is its ability to perform across a broad temperature range.

Published Special Metals information identifies applications from cryogenic temperatures to above 2000°F / 1095°C.

However, this does not mean that every Inconel 600 component can safely operate continuously at 1095°C.

Actual service temperature depends on:

  • Mechanical loading
  • Environment
  • Exposure duration
  • Oxidation conditions
  • Component geometry
  • Material condition
  • Applicable design code
  • Required service life

Therefore, temperature capability should always be evaluated against the actual engineering application.

Inconel 600 Standards

Several international specifications can apply to Inconel 600 depending on the product form.

Product FormCommon Specification
Rod / Bar / WireASTM B166
Seamless Pipe / TubeASTM B167
Plate / Sheet / StripASTM B168
UNS designationN06600
Werkstoff2.4816

ASTM B166-24 covers nickel-chromium-iron alloys including UNS N06600 in specified rod, bar and wire forms.

The exact standard should always be confirmed against the engineering drawing, purchase order and intended application.

Inconel 600 vs Generic Nickel Alloy Material

The term “nickel alloy” covers many different compositions and performance characteristics.

Inconel 600 is specifically identified as:

Nickel-Chromium-Iron Alloy

UNS N06600

W.Nr. 2.4816

This precise identification is important when purchasing material for industrial applications.

A supplier should not substitute another nickel alloy simply because it has a similar appearance or general corrosion-resistant classification.

What Should You Specify When Buying Inconel 600?

A professional purchase enquiry should include:

Material

Inconel 600 / UNS N06600

Product Form

For example:

  • Round bar
  • Rod
  • Wire
  • Sheet
  • Plate
  • Pipe
  • Tube

Dimensions

Specify:

  • Diameter
  • Thickness
  • Width
  • Length

Condition

State whether the material needs to be supplied in:

  • Annealed condition
  • Cold-worked condition
  • Other specified condition

Standard

For example:

ASTM B166, where applicable to the required product form.

Documentation

If required, mention:

  • MTC
  • Chemical analysis
  • Mechanical test results
  • Heat number
  • PMI
  • Third-party inspection

Providing complete information helps avoid specification errors during procurement.

Frequently Asked Questions

What is Inconel 600?

Inconel 600 is a nickel-chromium-iron alloy designed for corrosion and heat-resistant applications.

What is the UNS number of Inconel 600?

The UNS designation is N06600.

What is the Werkstoff number of Inconel 600?

The commonly associated Werkstoff number is 2.4816.

Is Inconel 600 a nickel alloy?

Yes. It is a nickel-chromium-iron alloy.

Is Inconel 600 stainless steel?

No. Inconel 600 is a nickel-based alloy rather than a conventional stainless-steel grade.

Is Inconel 600 precipitation hardenable?

No. It is not precipitation hardenable. Its strength can be increased through cold working.

What is Inconel 600 used for?

Applications include chemical processing, heat-treatment equipment, aerospace components, nuclear engineering, petrochemical processing and other high-temperature or corrosion-resistant applications.

What is the standard for Inconel 600 Round Bar?

ASTM B166 is a key specification for rod, bar and wire products covering UNS N06600 among other nickel alloys.

Can Inconel 600 be purchased as round bar?

Yes. Inconel 600 is available in round-bar form, subject to size, condition, specification and availability.

Why Source Inconel 600 from Manan Steel & Metals?

Manan Steel & Metals supplies industrial and specialty metal products, including Inconel round-bar requirements.

For an Inconel 600 Round Bar enquiry, buyers can provide:

  • Inconel 600 / UNS N06600
  • Required diameter
  • Required length
  • Quantity
  • Applicable standard
  • Material condition
  • MTC requirement
  • Delivery location

Explore the Manan Steel & Metals Inconel Round Bar range for additional product information.

You can also visit the Manan Steel & Metals website for other industrial metal requirements.

Contact Manan Steel & Metals

Manan Steel & Metals
Shop No. 2, Hira Building, 97 Khetwadi Main Road,
Girgaon, Mumbai – 400004, Maharashtra, India

Phone: 7977369869
Email: manansteel@gmail.com

For a quotation, send:

Grade + Size + Length + Quantity + Specification + Delivery Location

Conclusion

Inconel 600 is a versatile nickel-chromium-iron alloy identified by UNS N06600 and W.Nr. 2.4816.

Its combination of corrosion resistance, oxidation resistance, mechanical properties and high-temperature capability has made it an established engineering material for chemical processing, heat treatment, aerospace, nuclear and petrochemical applications.

Unlike precipitation-hardening nickel alloys, Inconel 600 is not precipitation hardenable. Its strength can instead be increased through cold working, making the supplied material condition an important procurement parameter.

For buyers sourcing Inconel 600 Round Bar, the material should be specified using the correct UNS designation, product form, dimensions, condition, applicable standard and certification requirements.

For industrial Inconel 600 requirements, contact Manan Steel & Metals with your exact specification.

Authoritative Technical References