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When is carbonitriding better than carburizing?

Carbonitriding (CN) is a very effective case hardening process, and it can be used on a variety of low carbon steels. CN is well suited for sheet steel and 10xx, 11xx, and 12xx series steels. The addition of nitrogen to the case hardening process allows the case hardened layer to react and form a harder case than would typically be provided with carburizing alone. The CN is also a lower temperature process, which can contribute to lower distortion.

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