CDK produces and markets manganese ferroalloys, rare-earth magnet alloys, and hydrogen storage alloys and other battery materials.

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Ferroalloys are auxiliary materials essential to the production of high-quality steel. CDK produces manganese ferroalloys with two large electric furnaces boasting 14-meter diameters.
Taking advantage of a favorable location neighboring the Sumitomo Metal Industries Kashima steelworks, which serves as the core of an iron and steel industrial complex, the CDK Kashima plant operates full-capacity night shifts when electric power tariffs are low to supply product at low, internationally competitive prices.
| Product | Customers | Applications |
|---|---|---|
| High-carbon ferromanganese (JIS no. 1 FMnH1) |
Steelmakers | ・ Deoxidizer and desulfurizer in steelmaking ・Alloy additive |
| Silicomanganese (JIS no. 3 SiMn3) |