Nickel Alloys Inconel Alloy 600 N06600
Austral Wight Speciality Metals

Product Data Sheet – Nickel Alloys

Inconel® Alloy600™  UNS N06600

Inconel® Alloy 600™ is a solid solution nickel chromium alloy for high temperature applications. Inconel 600 has good mechanical strength and can be used from cryogenic temperatures to 1200°C. It also has good corrosion resistance due to the high nickel content in combination with chromium.

Chemical Composition

ASTM B166 – Rod (Annealed)

Element %
Nickel
72.0 max
Chromium
14.0-17.0
Iron
6.00-10.00
Carbon
0.15 max
Manganese
1.00 max
Silicon
0.50 max
Sulphur
0.015 max
Copper
0.50 max

 

Specified Minimum Mechanical Properties

ASTM B166 – Bar (Annealed)

Yield Strength
Tensile Strength
Elongation
MPa
MPa
%
240 550 30

Typical Applications

Heat treating muffles and retorts, heat treating baskets, chlorination equipment to 540°C, pulp mill alkaline digesters. Other applications include heaters, stills, bubble towers, condensers for processing fatty acids, evaporator tubes, tube sheets and flaking trays for sodium sulphite manufacture, springs primary water pumping.

Availability

Austral Wright Metals can supply Inconel 600 as plate, sheet and strip, rod and bar, seamless and welded tube and pipe, welding fittings, forgings, forging billet, wire.

High Temperature Applications

Inconel 600 has excellent resistance to oxidation at high temperatures. It is the standard material for nitriding containers because of its resistance to nitrogen at high temperatures. It also has good resistance to carburisation. Inconel 600 will resist attack by sulphur compounds at moderate temperatures, but is subject to sulphidation at higher temperatures. Lubricants containing molybdenum disulphide should not be used above 425°C. Inconel 600 is not embrittled by long exposures at high temperature.

Pressure Vessels

Inconel 600 is approved under AS1210 and ASME boiler and pressure vessel code Sections I (Code case 1827), III, VIII for temperatures up to 650°C.

Nickel Alloys Inconel Alloy 600 N06600 Temperatures Nickel Alloys Inconel Alloy 600 N06600 Austral Wright Metals
Variation of tensile properties with temperature Cyclic oxidation resistance of various alloys at 980°C.Each cycle was 15 minutes of heating, 5 minutes of air cooling.

Corrosion Resistance

Inconel 600 has good corrosion resistance to many media. In feed water systems it is practically free of corrosion. It resists flowing sea water, but will corrode in stagnant sea water. The alloy has fair resistance to sulphuric acid at room temperature, but should not be used in this application at elevated temperatures. Resistance to hydrochloric acid is similar to sulphuric acid. The alloy has excellent resistance to phosphoric acid at room temperature in all concentrations, but is rapidly attacked at elevated temperature. Inconel 600 is practically free from chloride ion stress corrosion cracking. Please consult Austral Wright Metals for advice on your specific application.

Oxidation Resistance

Inconel 600 has good resistance to oxidation at high temperature. It out performs all other alloys for resistance to nitridation in cracked ammonia. It should not be used in sulphur containing atmospheres at high temperature, particularly if the conditions are reducing. It resists dry chlorine and hydrochloric acid gas at moderate temperatures.

Fabrication

Inconel 600 can be hot forged. The surface should be clean before heating. Solution annealing after forging is normal. Inconel 600 is readily cold formed by standard processes and equipment. Work hardening in cold forming may require intermediate anneal.

Machinability

Inconel 600 is reasonably easy to machine (class “C” alloy). Heavy machines, sharp tools, slow speeds and deep cuts to remove the work hardened layer are needed.

Weldability

Inconel 600 is readily welded by the SMAW (manual), GMAW (MIG), GTAW (TIG) and SAW processes. Preheat, post heat and post weld heat treatment are not needed. Contamination of the weld pool should be avoided. Inconel welding electrode 182 or Inconel filler metal 82 are normally used as welding consumables. Argon is used as the shielding gas.

Filler Metal Selection

Normal Service Higher Strength Best Corrosion Resistance
Welding Electrode Inconel WE 182 Inconel WE 182 Inconel WE 182
Filler Metal Inconel FM 82 Inconel FM 82 Inconel FM 82
Flux Cored Wire Inco Cored 82DH Inco Cored 82DH Inco Cored 82DH

Heat Treatment

Annealing at 1010°C for 15 minutes softens Inconel 600. Solution heat treatment is done at 1090 – 1150°C to dissolve carbides. Care should be taken with heat treatment as it affects corrosion resistance and high temperature properties.

Equivalent Specifications

Country Body Grade
USA UNS N06600
France AFNOR NC 15 Fe
GB BS NA 14
Germany DIN 2.4816

Physical Properties

Property
Metric Units
Density
8,470 kg/m³ @ 20°C
Melting Point
1354-1413°C
Electrical Resistivity
103 micro-ohm . m @ 20°C
Specific Heat
444 J/kg . °C @ 20°C
Mean Coefficient of Expansion
10.4 x 10-6 / °C @ 20°C
Thermal Conductivity
14.9 W / m . °C @ 20°C
Curie Temperature
-192°C
Modulus of Elasticity
Tension
214 GPa @ 20°C
Torsion
80.8 GPa @ 20°C
Poisson’s Ratio
0.324 @ 20°C
Relative Permeability
1.010 @ 200 Oe

ASTM Product Specifications

Specification Title
B163
Seamless Nickel and Nickel Alloy Condenser and Heat Exchanger Tubes
B166
Nickel Chromium Iron Alloys (UNS N06600, N06601, N06690, N06025 & N06045) and Nickel Chromium Cobalt Molybdenum Alloy (UNS N06617) Rod, Bar and Wire
B167
Nickel Chromium Iron Alloys (UNS N06600, N06601, N06690, N06025 & N06045) Seamless Pipe & Tube
B168
Nickel Chromium Iron Alloys (UNS N06600, N06601, N06690, N06025 & N06045) and Nickel Chromium Cobalt Molybdenum Alloy (UNS N06617) Plate, Sheet & Strip
B366
Factory Made Wrought Nickel and Nickel Alloy Fittings
B516
Welded Nickel Chromium Iron Alloy (UNS N06600), UNS N06025, and UNS N06045 Tubes
B517
Welded Nickel Chromium Iron Alloy (UNS N06600), UNS N06025, and UNS N06045 Pipe
B564
Nickel Alloy Forgings
B751
General Requirements for Nickel and Nickel Alloy Welded Tube
B775
General Requirements for Nickel and Nickel Alloy Welded Pipe

 

The technical advice and recommendations made in this Product Data Sheet should not be relied or acted upon without conducting your own further investigations, including corrosion exposure tests where needed. Please consult current editions of standards for design properties. Austral Wright Metals assumes no liability in connection with the information in this Product Data Sheet. Austral Wright Metals supplies a comprehensive range of stainless steels, copper alloys, nickel alloys and other high performance metals for challenging service conditions. Our engineers and metallurgists will be pleased to provide further data and applications advice.

 

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