ACM vs. FKM

Attribute	ACM	FKM
Definition	Association for Computing Machinery	Fachverband Kunststoff- und Gummimaschinen
Focus	Computing and technology	Plastics and rubber machinery
Membership	International	German
Publications	ACM Digital Library	FKM Journal

Introduction

ACM (Acrylic Rubber) and FKM (Fluoroelastomer) are two popular types of elastomers used in various industries for their unique properties and applications. Understanding the differences between ACM and FKM is crucial for selecting the right material for specific requirements. In this article, we will compare the attributes of ACM and FKM in terms of their chemical resistance, temperature range, mechanical properties, and cost.

Chemical Resistance

ACM is known for its excellent resistance to mineral oils, greases, and hydrocarbons, making it a preferred choice for applications in the automotive industry where exposure to these substances is common. On the other hand, FKM offers superior resistance to a wider range of chemicals, including acids, fuels, and solvents. This makes FKM a better option for applications where exposure to harsh chemicals is a concern.

Temperature Range

ACM has a lower temperature resistance compared to FKM. ACM can typically withstand temperatures ranging from -30°C to 150°C, making it suitable for moderate temperature applications. In contrast, FKM has a broader temperature range, with the ability to withstand temperatures from -20°C to 200°C or higher, depending on the specific grade. This makes FKM ideal for applications that require high-temperature resistance.

Mechanical Properties

ACM exhibits good mechanical properties, including high tensile strength and tear resistance. It also has low compression set, which allows it to maintain its shape under pressure. FKM, on the other hand, offers superior mechanical properties, with excellent tensile strength, tear resistance, and compression set resistance. This makes FKM a preferred choice for applications that require high-performance elastomers.

Cost

ACM is generally more cost-effective compared to FKM. The lower cost of ACM makes it a popular choice for applications where cost is a significant factor. However, it is essential to consider the overall performance requirements of the application when selecting between ACM and FKM, as the higher cost of FKM may be justified by its superior properties in certain applications.

Conclusion

In conclusion, ACM and FKM are two distinct elastomers with unique properties and applications. While ACM offers excellent resistance to mineral oils and greases, FKM provides superior resistance to a broader range of chemicals. FKM also has a wider temperature range and superior mechanical properties compared to ACM. When selecting between ACM and FKM, it is essential to consider the specific requirements of the application, including chemical exposure, temperature range, mechanical properties, and cost, to determine the most suitable material for the intended use.