ThePipingMart Blog Metals Alloy C22 vs C276 – What’s the Difference

Alloy C22 vs C276 – What’s the Difference

Alloy C22 vs C276

When it comes to choosing the right metal alloy for a project, understanding the differences between alloys C22 and C276 can be crucial. Both alloys are nickel-based, but they have very different properties. This blog post will discuss the differences between them so that you can make an informed decision when selecting metal alloys for your next project.

Alloy C22

Alloy C22 (UNS N06022) is a nickel-chromium-molybdenum alloy with excellent resistance to pitting, crevice corrosion and stress-corrosion cracking. It also has exceptional resistance to oxidation in air at temperatures up to 1600°F (871°C). Because of these properties, it is often used in applications such as heat exchangers, chemical processing equipment and valves. It is also popular for use in oil and gas exploration due to its ability to withstand high temperatures and pressures.

Alloy C276

Alloy C276 (UNS N10276) is another nickel-based alloy that has similar properties as Alloy C22 but with much higher levels of molybdenum and chromium. This makes it even more resistant to corrosion than Alloy C22. It also has good mechanical strength at both low temperatures and elevated temperatures. Common uses for this alloy include exhaust systems, turbine blades, pump parts, liners, pipe fittings and valves in industrial settings where severe conditions exist.

Difference Between Alloy C22 and Alloy C276

The primary difference between these two alloys lies in their chemical composition; Alloy C22 contains lower levels of chromium and molybdenum than Alloy C276, making it less resistant to corrosion but easier to weld. Additionally, Alloy 276 has higher tensile strength than Alloy 22, which makes it better suited for applications where high mechanical strength is required, such as turbine blades or valve components. On the other hand, because of its lower levels of chromium and molybdenum, welds on Alloy 22 are generally smoother than those on Alloy 276 due to its reduced susceptibility to hot cracking during welding operations.

Chemical Composition

The main difference between Alloy C22 and Alloy C276 is their chemical composition. Alloy C22 contains 22% chromium, 12% molybdenum, 3% tungsten, and less than 3% nickel. Alloy C276 contains 27% chromium, 16% molybdenum, 4% tungsten, and 5% nickel.

Tensile Strength

Alloy C22 has a higher tensile strength than Alloy C276. The tensile strength of Alloy C22 is 1,000 MPa, while the tensile strength of Alloy C276 is 930 MPa.

Yield Strength

Alloy C22 also has a higher yield strength than Alloy C276. The yield strength of Alloy C22 is 960 MPa, while the yield strength of Alloy C276 is 910 MPa.


Alloy C276 has a higher elongation than Alloy C22. The elongation of Alloy C276 is 30%, while the elongation of Alloy C22 is 28%.


Alloy C22 is typically more expensive than Alloy C276 due to its higher chromium and molybdenum content.


Deciding which alloy is best for your needs depends on the specific application you have in mind. If you need a material that can withstand highly corrosive environments, then you should opt for the superior corrosion resistance offered by Alloy 276; if you are looking for a material that can be easily welded, then you might want to go with the smoother welds provided by Alloy 22 instead. Ultimately though, both alloys provide excellent performance characteristics, so it’s important that you carefully consider your options before deciding which one works best for your project’s needs!

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