The alloy has a high value of specific heat, which increases with the temperature of the alloy. This can therefore be used to sink heat. It also has an appropriate amount of thermal conductivity.
Under cryogenic temperature range, the tensile strength increases considerably. Brinell hardness of hot rolled alloy, being 182 at room temperature decreases considerably on increasing the temperature above 400°C, and then becomes constant at about 135.
Impact test are vital for engineering materials. Even at lower temperatures, the alloy remains tough and the brittleness of the substance is resisted, making the alloy useful for that range. At room temperature, the alloy absorbs 244 Joules. An annealed cold rolled sheet will give a shear strength of 419.2 megapascal and Rockwell hardness of 71B. Engineering application is often done through cyclic stresses and the fatigue strength of the material therefore becomes crucial. A rotating-beam fatigue test (10^ 8 cycles) conducted on cold drawn, annealed rod reveals the pattern of its fatigue strength even at elevated temperatures. The fatigue strength remains constant from room temperature to about 340 megapascal at 200°C but decreases to 325 megapascal when the temperature is raised between 320°C to 420°C. Increasing the temperature further, the fatigue strength of the alloy decreases from 310 megapascal at 420°C to about 105 megapascal at 780°C. The microstructure of INCONEL alloy 600 reveals a stable austenitic phase. It also has a solid solution with a few precipitated phases of cyanonitrides and chromium carbides. The microstructural changes in the alloy 600 are not likely to occur at stream generator operating temperatures. If some microstructural changes that are immeasurable do occur, they will not have an adverse effect on the intergranular stress corrosion cracking resistance.
Engineering materials are required in the application of furnaces and heat-treating fields, which need to have resistance to oxidation as well as scaling. On carburising alloy 600 at 925°C, the weight gain is 2.66 mg/ cm^ 2, whereas on carburising the alloy INCOLOY, 800HT and Type 330 Stainless Steel, the weight gain is 4.94 mg/cm^ 2 and 6.42 mg/cm^ 2. This reveals the commendable resistance of alloy 600 to carburisation even at high carburising temperatures. With its resistance to sulphur compounds, it also provides resistance to neutral and alkaline salt solutions. Thereby, it is used in caustic environments.
The alloy has its products formed under various standards that include ASTM, ASME, SAE, ISO, DIN, etc.
Inconel alloy 600 ASTM standards for Seamless tubing, Welded tubing, Seamless Pipe and Welded pipe is B163, B516, B167 and B517 respectively.
The impact strength of the weld from cryogenic to high temperature ranges between 57- 66 Joules. INCONEL alloy 600 is designated as UNS N06600 and W. Number 2.4816. INCONEL alloy 600 becomes a remarkable material when it comes to the combination of proper toughness, good strength, considerable thermal properties, oxidation and corrosion resistance.
