Is Inconel stronger than stainless steel?

When comparing stainless steel vs. Inconel, it's important to remember that each material has a different formula. Variants of stainless steel have significantly different tensile strengths, recommended operating temperatures, and resistance to specific corrosive agents. For example, grade 316 stainless steel tends to have higher chloride resistance than 304 stainless steel (but also costs more on average).

In addition, certain processing and forming methods may affect the tensile strength of the metal. Inconel 625 "rolled" bar has a tensile strength of 120-160 ksi (827-1103 MPa), while "solution treated" bar has a tensile strength of 103-130 ksi (714-896 MPa) strength.

You may have noticed that both tensile strength ratings are given as a range rather than a specific number. This is because the strength of a metal can vary depending on the precise proportions of its ingredients - slight changes in carbon, nickel or iron content can significantly alter the strength of the final product.

Inconel 625 has higher tensile strength than grade 304 stainless steel and retains that strength better at higher operating temperatures.

Additionally, while this particular type of Inconel has a lower melting point than 304 stainless steel, it has a higher operating temperature limit. This is because Inconel is stronger than stainless steel at high temperatures and is also more resistant to oxidation and scaling.

However, stainless steel may be more resistant than Inconel to certain chemicals, such as sulfuric acid. Therefore, the choice of which of these two metal alloys to use will depend on their specific application.

Inconel tends to be better suited for heat treatment applications and other high temperature processes. Meanwhile, stainless steel alloys are often suitable for sterile manufacturing or medical applications (or any application involving corrosive agents).

Need help choosing the right metal alloy for your needs? Contact the GNEE STEEL team today to learn more about Inconel, stainless steel, and other custom wire materials.