What is 4140 DCF Steel Plate ?

Decarb Free stands for DCF. It means 4140 steel plate has been ground top and bottom. It is oversized to finish on the thickness, without the black surface.  DCF offers excellent wear resistance, combined with good deep hardening characteristics. Its ability to show low distortion or movement in heat treatment. It also makes this material an excellent product for many tool room applications where size stability is critical.