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FDA Rules for ferrous metals

I am developing a knife sharpener for commercial use. It will include a diamond chip plated surface of a carbon steel plate. Do FDA rules allow use of ferrous metal in this application? Or, must I use stainless steel or some other non-ferrous metal in all cases?

Brock Presgrove
- Franklin, Tennessee, USA
2005

Why not check with the FDA Homey?

Daryl Spindler, CEF
decorative nickel-chrome plating - Greenbrier, Tennessee
2005

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