Balls of this material have a lower chrome content than 440c and are used in applications where the more rigid corrosion resistance requirements can be relaxed. They have fair resistance to fresh water, steam, oil, gasoline, blood, perspiration, alcohol and food environment, however will not pass 40 hours salt spray test.International EquivalentsAISI 420, JIS SUS 420, JI X20 CR13, Z40 C13, EN56D, Wks 1.4034CompositionC          0.15 - 0.36%Cr         12 - 14%Si         1.0% MaxMn        1.0% MaxP          0.04% MaxS          0.03% MaxHardness: HRc 52 - 55Mechanical PropertiesTensile Strength   275,000 psiSpecific Weight    0.280 lbs/cu inSize range: 1.588mm (1/16") to 50.800 (2")Standard grades available: 100, 500, 1000