304 stainless steel ball.
Application field 9:28: 304 stainless steel ball is the market on the most widely used a ball can be used in medical equipment, chemical, aviation, aerospace, plastic and hardware: perfume bottles, sprayer, valves, nail polish, a motor, a switch, electric irons, washing machines, refrigerators, air conditioners, medicinal materials, auto parts, bearing, instrument, bottle.  
This special: typical austenitic steel, no magnetic, but after the ball will go with magnetic, magnetic, HRC = 26. Has good rust and corrosion resistance.  
] than is: 304HC Stainless steel ball is softer than 304 stainless steel ball, the more easy to processing, and 304L stainless steel ball than the above two has stronger anti rust and anti-corrosion performance, easy welding, polishing of excellent, more suitable for requirement of higher surface industry.