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Luoyang Mingzhen Bearing Steel Ball Co., Ltd is one of the famous chrome steel balls manufacturers and suppliers in China,Website:http://www.mzballs.com, providing with chrome steel balls free sample, welcome to import high precision bulk bearing steel balls, chrome balls, grinding steel balls, bearing ball in stock from our factory.Chrome steel balls (bearing steel balls) are used in the ball and roller bearing industry and for a variety of automobile applications. The material of chrome steel balls is Gcr15 (AISI 52100). This kind of material offers excellent surface quality, high hardness, superior wear resistance and high load bearing capacity but also easy to rust and strongly attracted by magnet. Chrome steel ball is one of our main products.CHROME STEEL BALLSize range0.50mm (0.02& quot;) up to 80mm (3-1/8& quot;)GradesG3, G5, G10, G16, G20, G24, G28, G40, G60, G100, G200?MATERIAL CONVERSION GB (China)Gcr15ASTM/AISI (USA)52100ГОСТ (Russia)ШX15BS (UK)534A99JIS (Japan)SUJ2NF (France)100C6VDEh (Germany)100Cr6 (1.3505)?CHEMICAL COMPOSITION (Gcr15) Chromium (Cr)1.40% - 1.65%Carbon (C)0.95% - 1.05%Manganese (Mn)0.25% - 0.45%Silicon (Si)0.15% - 0.35%Phosphorous (P)0.025% Max.Sulphur (S)0.025% Max.Molybdenum (Mo)0.10% Max.Nickel (Ni)0.30%Copper (Cu)0.25% Max.Nickel (Ni) + Copper (Cu)0.50% Max.?PHYSICAL CONSTANTS Specific gravity, g/cc7.8Density, lb./cu. In0.23Thermal coefficient expansion, °F0.0000069Modulus of elasticity, psi29000000Modulus of rigidity, psi12000000?PHYSICAL CHARACTERISTICS Corrosion resistanceNo corrosion resistanceMagneticStrongly attracted by a magnet?APPLICATION Ball bearings, Wind power bearings, Components of cars, Quick disconnect couplings, Linear guides etc.