Martensitic hardened stainless steel balls,they feature good hardness,corrosion resistance ,wear and abrasion resistance. Balls are provided in passivate. Applications�?special bearings,anti-friction bearings, special pumps,recirculating balls,lighters,pens,automotive seatbelts&components. Taian Xinyuan Precision Steel Ball Manufacturing Co.,Ltd Material: stainless steel Size: 25.4mm (1") Precision: G100-G1000 International Standards CHN: 4Cr13 USA: 420C GER: 1.4034 FRA: Z34C14 ITA: X46Cr13 RUS: 40Kh13 Chemical Composition C: 0.43-0.50% Si: 1.00% max Mn: 1.00% max P: 0.040% max S: 0.030% max Cr: 12.5-14.5% Technical data Hardness: 52-60 HRC Ultimate compressive strength: 1700-1900MPa Service temperature: 0 to 400ºC Mechanical properties Tensile strength: 275,000 psi Density: 0.280 lbs/cu.in Physical characteristic Good corrosion resistance Heat-resistance Martens tic material How to inquire When ordering balls, please specify the following: Nominal ball diameter Type of material Precision grade Quantity Payment terms All standard steel balls are always in stock and ready for immediate off-the-shelf delivery If your application calls for customized balls, send us your specifications and well glady meet them