If you're a metalworker, fabricator, or enthusiast looking for a suitable material to employ in your upcoming project, read on. In that case, you might have encountered Incoloy in the grades 800 and 840. Both are extremely effective alloys that are utilised in numerous sectors. But what distinguishes them specifically? Let's see how Incoloy 800 and 840 differ from one another.

The chemical makeup of these two grades of Incoloy is what largely distinguishes them from one another. Iron, nickel, chromium, and a few other trace components make up Incoloy 800. Due to its high chromium concentration, it is widely renowned for its outstanding corrosion resistance. In contrast, Incoloy 840 has trace amounts of other elements, including iron, nickel, copper, titanium, and aluminium. It is stronger than an 800 since copper is present, but it is also more prone to corrosion in acidic situations.

The melting points of these two classes are another obvious distinction. Compared to Incoloy 840, Incoloy 800 has a greater melting point (1425 vs. 1390 °C). This indicates that it can endure higher temperatures without degrading or becoming brittle, as some metals can do when subjected to extremely high temperatures. However, depending on the application, each grade has its own distinct advantages, therefore this does not necessarily imply that one grade is superior than the other.

Composition

Copper and aluminium are included in the austenitic nickel-iron-chromium alloy known as Incoloy 800. Molybdenum, copper, and titanium are included in the precipitation-hardening nickel-chromium alloy known as Incoloy 840.

Melting Point

The melting point of Incoloy 800 is around 2,100 degrees Fahrenheit, while that of Incoloy 840 is approximately 2,550 degrees Fahrenheit.

Tensile Strength

The tensile strength of Incoloy 800 is around 95 ksi, while that of Incoloy 840 is approximately 130 ksi.

Thermal Conductivity

Incoloy 840 has a thermal conductivity of about 120 W/m-K, compared to about 100 W/m-K for Incoloy 800.