... chemical industry,plastic hard ware,scent bottle sprayer,valve,nail polish,air condition,medical material,automotive ... and valve parts.420C is a martensitic stainless steel with 12% Chromium which is sufficient to give ... balls can be annealed and passivated. The most common applications include their use in the chemical, paper ... further Information,Plz contact us! 8mm High Quality Stainless steel ball