UNS N08825 ( Alloy 825, W.Nr. 2.4858, Incoloy® 825) is an alloy composed of nickel, iron, and chromium, with additional elements such as molybdenum, copper, and titanium. This alloy exhibits exceptional resistance to various corrosive environments. Its high nickel content enables it to effectively withstand chloride-ion stress-corrosion cracking. The combination of nickel, molybdenum, and copper provides remarkable resistance to reducing environments, including those containing sulfuric and phosphoric acids. Moreover, the presence of molybdenum enhances its ability to resist pitting and crevice corrosion. Furthermore, the inclusion of titanium, along with suitable heat treatment, helps stabilize the alloy against intergranular corrosion sensitization.

The differences in carbon, aluminum, and titanium content among the three alloys, UNS N08810 and UNS N08811, do not vary significantly. However, their mechanical properties and resistance to high-temperature corrosion make them highly valuable for applications requiring prolonged exposure to elevated temperatures and corrosive environments. In comparison to Incoloy 800, both Incoloy 800H and Incoloy 800HT exhibit significantly higher creep and rupture strength. While the carbon content in Incoloy 800 has no lower limit and a maximum of 0.10%, Incoloy 800H has a carbon content ranging from 0.05 to 0.10%, and Incoloy 800HT has a more restricted range of 0.06 to 0.10%. Additionally, Incoloy 800H and Incoloy 800HT undergo a high-temperature annealing treatment, resulting in a coarser grain size. This annealing treatment, along with the controlled chemical composition, contributes to the enhanced creep and rupture strength exhibited by these alloys.

UNS N08800, also known as Alloy 800, W.Nr. 1.4876, or Incoloy® 800, is a nickel-based alloy specifically designed to withstand corrosive and high-temperature environments. Its composition, primarily consisting of nickel, enables it to resist stress corrosion cracking and maintain a ductile, austenitic structure. The presence of chromium in the alloy provides excellent resistance to both aqueous corrosion and high-temperature oxidation. Additionally, the iron content contributes to its ability to resist internal oxidation. Moreover, Incoloy 800 exhibits favorable formability, weldability, and machinability. These exceptional properties make it a widely utilized material for constructing equipment that requires resistance to corrosion, heat, strength, and stability in service conditions of up to 1500°F (816°C).

UNS N0660 (Alloy 600, W.Nr. 2.4816, Inconel® 600) is a nickel-chromium alloy renowned for its nonmagnetic properties. With its substantial nickel content, this alloy exhibits remarkable resistance to corrosion from both organic and inorganic compounds, making it highly resistant to chloride-ion stress-corrosion cracking. The inclusion of chromium imparts resistance to sulfur compounds and offers protection against oxidation in high-temperature or corrosive environments. Moreover, this alloy boasts exceptional mechanical properties, including high strength and excellent workability. However, it should be noted that Inconel 600 cannot be hardened through precipitation, but rather through cold work. Its remarkable versatility has made it a preferred choice in various applications that span a wide temperature range, from cryogenic conditions to temperatures exceeding 2000°F (1095°C).

Inconel 625 (UNS N06625, Alloy 625, W.Nr. 2.4856) is a highly popular nickel-chromium alloy known for its exceptional properties, including high strength, excellent fabricability, and remarkable corrosion resistance. The strength of Inconel 625 is attributed to the reinforcing effect of molybdenum and niobium on its nickel-chromium matrix. As a result, it does not require precipitation hardening treatments. This unique combination of elements also provides superior resistance to various highly corrosive environments and high-temperature effects such as oxidation and carburization. Inconel 625 can effectively perform within a wide temperature range, from cryogenic temperatures up to 1800°F (982°C).

UNS N07718 (Alloy 718, W.Nr. 2.4668, Inconel® 718)is an exceptional alloy renowned for its remarkable combination of high strength and corrosion resistance. This age-hardenable alloy achieves its impressive properties through the strategic addition of niobium, titanium, and aluminum. With a temperature suitability ranging from -423°F to 1300°F, it demonstrates outstanding welding characteristics, including remarkable resistance to post weld cracking. Moreover, the ease and cost-effectiveness of fabricating Inconel 718, coupled with its exceptional tensile, fatigue, creep, and rupture strength, have made it a material of choice across a diverse range of applications."

UNS N04400 (also known as Alloy 400, W.Nr. 2.4360, or Monel® 400) is a single-phase, solid-solution alloy that achieves hardening primarily through cold working rather than heat treatment. It exhibits high strength and toughness across a broad temperature range and demonstrates exceptional resistance to various corrosive environments. Monel 400 retains excellent mechanical properties even at subzero temperatures, with strength and hardness increasing while maintaining ductility and impact resistance. Unlike many ferrous materials, it does not undergo a ductile-to-brittle transition even when exposed to the extremely low temperatures of liquid hydrogen.

UNS N05500 (Alloy K-500, W.Nr. 2.4375, Monel® K-500) is a precipitation-hardenable nickel-copper alloy with a low magnetic permeability. It exhibits strong non-magnetic characteristics across a broad temperature range, including subzero conditions. This alloy shares similar corrosion resistance with Monel 400 but offers the added benefits of enhanced strength and hardness. The increased properties are achieved by incorporating aluminum and titanium into the nickel-copper base and subjecting it to controlled heating conditions, resulting in the precipitation of submicroscopic particles of Ni3 (Ti, Al) throughout the matrix.

UNS N06075 (Alloy 75, W.Nr. 2.4951, Nimonic® 75) is an 80/20 nickel-chromium alloy featuring controlled additions of titanium and carbon. Renowned for its elevated temperature strength, corrosion resistance, and outstanding mechanical properties, this alloy finds extensive applications across diverse fields. Currently, it is predominantly employed in sheet applications that demand both oxidation and scaling resistance, along with medium strength at elevated operating temperatures. Furthermore, Nimonic 75 is easily fabricated and weldable.

UNS N07080 (Alloy 80A, W.Nr. 2.4631, Nimonic® 80A) is a nickel-chromium alloy that can be wrought and age-hardened. Strengthened through the addition of titanium, aluminum, and carbon, this alloy is designed for use in environments with temperatures reaching up to 815°C (1500°F). The manufacturing process involves high-frequency melting and casting in air for forms that will undergo extrusion.