Alloy 600 - UNS N06600

UNS N06600

Typical Inventory

Round Bar, Hex Bar, Tig Wire, Plate, Strip, Tubing, Elbow

Product Description

Alloy 600, also called Nickel 600 or Inconel® 600, is a nickel-chromium alloy with good oxidation resistance at higher temperatures, with good resistance in carburizing and chloride containing environments.

Alloy 600 is a nickel-chromium alloy designed for use from cryogenic to elevated temperatures in the range of 2000 deg F(1093 deg C). The high nickel content of the alloy enables it to retain considerable resistance under reducing conditions and makes it resistant to corrosion by a number of organic and inorganic compounds. The nickel content gives it excellent resistance to chloride-ion stress-corrosion cracking and also provides excellent resistance to alkaline solutions.

Its chromium content gives the alloy resistance to sulfur compounds and various oxidizing environments. The chromium content of the alloy makes it superior to commercially pure nickel under oxidizing conditions. In strong oxidizing solutions like hot, concentrated nitric acid, 600 has poor resistance. Alloy 600 is relatively un-attacked by the majority of neutral and alkaline salt solutions and is used in some caustic environments. The alloy resists steam and mixtures of steam, air and carbon dioxide.

Alloy 600 is non-magnetic, has excellent mechanical properties and a combination of high strength and good workability and is readily weldable. Alloy 600 exhibits cold forming characteristics normally associated with chromium-nickel stainless steels.

Typical corrosion applications include titanium dioxide production (chloride route), perchlorethylene syntheses, vinyl chloride monomer (VCM), and magnesium chloride. Alloy 600 is used in chemical and food processing, heat treating, phenol condensers, soap manufacture, vegetable and fatty acid vessels and many more.

General Data

  • Virtually immune to chloride ion stress corrosion cracking.
  • Good caustic corrosion resistance.
  • Resistant to dry Cl2 to about 1000°F.
  • Oxidation resistance to 2000°F.
  • Carburization resistance.

Applications

  • Thermocouple sheaths.
  • Ethylene dichloride (EDC) cracking tubes.
  • Conversion of uranium dioxide to tetrafluoride in contact with hydrofluoric acid.
  • Production of caustic alkalis particularly in the presence of sulfur compounds.
  • Reactor vessels and heat exchanger tubing used in the production of vinyl chloride.
  • Process equipment used in the production of chlorinated and fluorinated hydrocarbons.
  • In nuclear reactors uses are for such components as control rod inlet stub tubes, reactor vessel components and seals, steam dryers and d separators in boiling water reactors. In pressurized water reactors it is used for control rod guide tubes and steam generator baffle plates etc.
  • Furnace retort seals, fans and fixtures.
  • Roller hearths and radiant tubes, in carbon nitriding processes especially.
  • Heat treating muffles and retorts.
  • Vacuum furnace fixtures.
  • Chlorination equipment to 1000°F.
  • Titanium dioxide plants.

Chemistry

Ni Cr C Mn Cu Si S Fe
Max % 17.0 0.15 1.0 0.5 0.5 0.015 10.0
Min % 72.0 14.0 6.0

Mechanical Properties

Type Ultimate Tensile (ksi) Yield Strength (ksi) Elong. % in 2 in. Reduction of Area Hardness (Rockwell C)
Min Cold worked 110 85 10
Min Hot worked 90 40 25

Common Specifications

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

Form Standard
Metal Type UNS UNS N06600
Bar ASTM B166 AMS 5665 Din 17752
Wire
Sheet ASTM B168 AMS 5540 Din 17750
Plate ASTM B168 AMS 5540 Din 17750
Pipe ASTM B167
Tube ASTM B167
Fitting ASTM B167
Forging ASTM B564 Din 17754
Weld Wire FM 82
Weld Electrode FM 182/ ENiCrFe-3
Din 2.4816

Machining

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. Detailed machining parameters are presented Tables 16 and 17. General plasma cutting recommendations are presented in Table 18.