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Nickel Alloy 600


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Plates/Strips

Thickness: Cold-rolled 0.2-6.0mm, hot-rolled 6.0-100mm (customizable up to 150mm)
Width: Standard 1000/1220/1500mm, max. customizable 2000mm (capacity confirmation required)
Length: Fixed length 2000/2440/3000mm, random length 3000-6000mm (cut to order)

Bars/Forgings

Bars: Diameter 6mm (cold-drawn) - 300mm (hot-rolled); length: fixed 3-6m, max. random length 12m (negotiable)
Forgings: Discs (diameter 200-1500mm, thickness 50-500mm); Rings (inner diameter 100-1200mm, outer diameter 200-1500mm, height 50-600mm); Shafts (diameter 50-400mm, length 500-5000mm, customizable)

Pipes (Seamless/Welded)

Seamless pipes: Outer diameter 6-219mm, wall thickness 1-20mm (SCH10-SCH160); length: fixed 6-12m, max. random length 18m
Welded pipes: Outer diameter 10-325mm, wall thickness 0.8-12mm; customizable U-tubes/coiled pipes (bend radius ≥ 3×outer diameter)

Wire

Diameter: 0.5-16mm (cold-drawn, hard/annealed condition)
Coil weight: Standard 50-500kg, large coils up to 1000kg (per packaging requirements)

Note: Standard specifications are available for immediate supply; special dimensions require customization (lead time to be confirmed based on process)

UNS N06600 DIN 2.4816 NiCr15Fe NCF 600 Inconel 600 bar Inconel 600 pipe Inconel 600 coil Inconel 600 plate Inconel 600 wire Inconel 600 tube

Product Description

Alloy 600 (UNS N06600), commonly known by the registered trademark Inconel® 600, is a nickel-chromium-iron alloy developed for applications requiring a practical combination of corrosion resistance, heat resistance, mechanical strength and fabricability.

A minimum nickel content of 72% provides strong resistance to many reducing media and gives the alloy very high resistance to chloride-ion stress-corrosion cracking. Chromium improves resistance to oxidizing environments and sulfur compounds. Alloy 600 also retains useful mechanical properties from cryogenic temperatures to elevated-temperature service.

Alloy 600 is a solid-solution-strengthened alloy. It is not precipitation hardenable and should not be specified with aluminum-alloy tempers such as T4 or T6. Strength is increased primarily by cold working, while annealing or solution treatment is selected according to the required balance of formability, corrosion resistance and creep performance.

Chemical Composition

Alloy 600 Chemical Composition

Limiting composition, weight %

Element	Requirement
Nickel + Cobalt	72.0 min.
Chromium	14.0–17.0
Iron	6.0–10.0
Carbon	0.15 max.
Manganese	1.00 max.
Silicon	0.50 max.
Copper	0.50 max.
Sulfur	0.015 max.

Source basis: Special Metals Alloy 600 technical bulletin and ASTM product specifications for UNS N06600. The purchase order and mill test certificate remain the controlling documents.

Alloy 600 Mechanical Properties

ASTM B168 Acceptance Minimums for Flat Products

The following values are minimum acceptance requirements, not typical design values.

Product and condition	Tensile strength, min.	0.2% yield strength, min.	Elongation, min.
Hot-rolled plate, annealed	550 MPa (80 ksi)	240 MPa (35 ksi)	30%
Hot-rolled plate, as-rolled	586 MPa (85 ksi)	240 MPa (35 ksi)	30%
Hot-rolled sheet, annealed	550 MPa (80 ksi)	240 MPa (35 ksi)	30%
Cold-rolled sheet, annealed	550 MPa (80 ksi)	240 MPa (35 ksi)	30%
Cold-rolled sheet, hard*	860 MPa (125 ksi)	620 MPa (90 ksi)	2%
Cold-rolled strip, annealed	550 MPa (80 ksi)	240 MPa (35 ksi)	30%
Cold-rolled strip, hard*	860 MPa (125 ksi)	620 MPa (90 ksi)	2%

*ASTM B168 also defines hardness-controlled intermediate strip conditions. Applicability depends on product thickness and purchase-order requirements.

Alloy 600 Typical Room-Temperature Property Ranges

The ranges below are producer-published typical values and are not acceptance criteria.

Product and condition	Tensile strength	0.2% yield strength	Elongation
Cold-drawn rod/bar, annealed	550–690 MPa	170–345 MPa	35–55%
Cold-drawn rod/bar, as-drawn	725–1,035 MPa	550–860 MPa	10–30%
Hot-rolled plate, annealed	550–725 MPa	205–345 MPa	35–55%
Cold-rolled sheet, annealed	550–690 MPa	205–310 MPa	35–55%
Cold-rolled strip, spring temper	1,000–1,170 MPa	830–1,100 MPa	2–10%
Cold-drawn tube/pipe, annealed	550–690 MPa	170–345 MPa	35–55%

Mechanical requirements vary by product form, size, condition and standard edition. Do not use one flat-product value as a universal guarantee for bar, wire, pipe, tube or forgings.

Alloy 600 Typical Physical Properties

Property	Typical value
Density	8.47 g/cm³
Melting range	1,354–1,413 °C
Specific heat at approximately 20 °C	444 J/kg·°C
Thermal conductivity at approximately 20 °C	14.9 W/m·°C
Electrical resistivity at approximately 20 °C	1.03 µΩ·m
Modulus of elasticity at approximately 20–22 °C	214 GPa
Relative magnetic permeability at 200 Oe	1.010

These values are typical engineering data and are not specification limits.

Alloy 600 Product Forms and Applicable Standards

Product form	Common specification	Scope note
Plate, sheet and strip	ASTM B168 / ASME SB-168	Rolled flat products
Rod, bar and wire	ASTM B166 / ASME SB-166	Hot-finished and cold-worked long products
Forgings, flanges and forged fittings	ASTM B564 / ASME SB-564	Forged products; N06600 is included
Seamless pipe and tube	ASTM B167 / ASME SB-167	General corrosion- and heat-resistant seamless tubular products
Seamless condenser and heat-exchanger tube	ASTM B163 / ASME SB-163	OD 76.2 mm and under, subject to wall limits in the standard
Welded boiler, heat-exchanger and condenser tube	ASTM B516 / ASME SB-516	Welded tubular products made without added filler metal
Welded pipe	ASTM B517 / ASME SB-517	Welded, cold-worked and annealed pipe
General requirements for seamless pipe and tube	ASTM B829 / ASME SB-829	General requirements used with the applicable product specification; not a standalone alloy product specification
General requirements for welded tube	ASTM B751 / ASME SB-751	General requirements used with B516 and related product specifications
Aerospace sheet, strip and plate	SAE AMS 5540	Confirm revision and purchaser requirements
Aerospace seamless tube	SAE AMS 5580	Confirm revision and purchaser requirements
Aerospace bar, forgings and rings	SAE AMS 5665	Confirm revision and purchaser requirements

Current-version note: Standards are revised periodically. The requested standard number, revision year, product form, condition, dimensions and supplementary tests should all appear on the purchase order.

Application

Alloy 600 Typical Applications

Industrial furnace retorts, muffles, rollers, hearth components, baskets and trays

Nitriding and carburizing furnace fixtures

Chemical-process heaters, condensers, evaporators and vessels

Caustic-processing vessels and piping

Chlorinated and fluorinated hydrocarbon processing equipment

Heat-exchanger and condenser tubing

Thermocouple protection tubes

High-temperature exhaust liners, seals and fastening wire

Nuclear-service components produced to application-specific specifications

High-temperature sensors, spark-plug electrodes and rupture-disc components

Material selection must be validated against the actual medium, concentration, pressure, temperature, stress, fabrication condition and design code.

FAQ

What is the difference between Alloy 600 and Alloy 601?

Alloy 600 is a nickel-chromium-iron alloy valued for broad corrosion resistance, fabricability and resistance to chloride-ion stress-corrosion cracking. Alloy 601 contains a deliberate aluminum addition that develops a more protective oxide scale, making it generally preferable where maximum high-temperature oxidation resistance is the principal requirement. The choice should be based on atmosphere, temperature, mechanical loading and fabrication route.

What is the difference between Alloy 600 and Alloy 625?

Alloy 625 contains substantial molybdenum and niobium, giving it higher strength and stronger resistance to localized attack in many aggressive aqueous environments. Alloy 600 is often selected for chloride stress-corrosion resistance, caustic handling, furnace hardware and general heat-resistant service. Alloy 625 is usually considered when pitting, crevice corrosion, seawater exposure or higher strength is more important. A corrosion review is recommended before substitution.

Can Alloy 600 be hardened by heat treatment?

No. Alloy 600 is not precipitation hardenable. Annealing and solution treatment control grain structure, carbide condition, ductility and creep performance, but they do not produce age-hardening in the way used for alloys such as 718. Higher room-temperature strength is obtained mainly through cold work.

Is Alloy 600 suitable for concentrated caustic service?

It is widely used in alkaline processing, but high-temperature, high-strength caustic environments can produce stress-corrosion cracking. Material condition, residual and applied stress, concentration, temperature and contamination must be reviewed. Stress relief or an alternative alloy may be required for severe service.

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