Inquiry (采购产品): black anneal I have 4 prototype 4140 steel parts that have been ferritic nitrocarburized. These parts are about 7.5" x 2.75' x 1" and our marketing dept. wants them blackened. Is it possible to do this without affecting the strength or hardness of the part? **** Hidden Message ***** Jon Wickman 45030 Company: Cincinnati Inc. E-mail: jon.wickman@e-ci.com **** Hidden Message ***** jon.wickman@e-ci.com
