ThePipingMart Blog Metals CF8M vs CF8 Stainless Steel – What’s the Difference

CF8M vs CF8 Stainless Steel – What’s the Difference

CF8M vs CF8 Stainless Steel

Stainless steel is valuable for many industrial applications, but not all stainless steel is created equal. Different grades of stainless steel have different properties and uses, so it’s essential to know the difference between them. This blog post will explain the differences between two popular grades of stainless steel: CF8M and CF8.

What Is CF8M Stainless Steel?

CF8M (cast iron grade 8 modified) stainless steel is a variant of the 304 grade of stainless steel. It has higher carbon content than its counterparts, which gives it superior corrosion resistance. The increased carbon content also gives it better machinability, which makes it easier to work with in fabrication processes such as welding, drilling, and cutting. The higher carbon content also allows it to withstand high temperatures without deforming or warping. This makes CF8M an ideal choice for applications requiring superior corrosion and heat resistance, such as valves used in chemical processing plants or pumps used in power plants.

What Is CF8 Stainless Steel?

CF8 (cast iron grade 8) stainless steel is another type of 304-grade stainless steel with slightly lower carbon content than its sibling, CF8M. This lower-carbon version has greater formability and weldability than its higher-carbon counterpart but still provides good corrosion resistance and heat resistance for some applications. It is typically used for general-purpose parts such as valve components, pump components, food processing equipment parts, kitchen equipment parts, and automobile exhaust systems.

Difference Between CF8M and CF8 Stainless Steel

Chemical Composition

CF8M and CF8 stainless steels are both austenitic stainless sheets of steel, meaning they are non-magnetic and have a high degree of corrosion resistance. CF8M is a cast version of stainless steel, while CF8 is a wrought version. The main difference between CF8M and CF8 stainless steel is their chemical composition. CF8M contains more carbon than CF8, which gives it better castability but reduced weldability.

Mechanical Properties

CF8M and CF8 stainless steels also have different mechanical properties. CF8M has a higher yield strength and tensile strength than CF8, meaning it is better suited for applications that require high strength. However, CF8 has better ductility than CF8M, which is more resistant to cracking during welding.

Corrosion Resistance

Both CF8M and CF8 stainless steels have excellent corrosion resistance thanks to their austenitic structure. They are both resistant to most acids, alkalis, and chemicals. However, CF8M is slightly more resistant to corrosion than CF8 due to its higher carbon content.

Temperature Resistance

CF8M and CF8 stainless steels can both be used at high temperatures without losing their properties. However, CF8M can withstand higher temperatures than CF8 before beginning to soften. This makes it the better choice for applications that require high-temperature resistance.


CF8M and CF8 stainless steels have similar costs as they are both austenitic stainless steel sheets; however, because CF8M has better castability and corrosion resistance than CF.


CF8M vs CF8 stainless steels offer excellent corrosion and heat resistance qualities due to their 304-grade composition. However, they have different levels of carbon content, giving them unique properties beneficial in other contexts. For example, if you need superior corrosion resistance and heat resistance, you should opt for a more robust material like CF8M; if you need weldability, you should opt for a less robust material like CF8. Ultimately choosing between these two materials depends on your unique needs – so it’s essential to consider your application before making a decision!

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