High Hardness, High Impact Value, Uniform Chemcial Composition, Low Loss of roundness 1- Specification:(1)Diameter: 25mm to 125mm(2)Roundness: Spherical with little overfill or underfill within the national standard: GB-8649-88 and YB/T 091-1996(3)Surface hardness: HRC 55-65(4)Metallographic structure: Substantially martenistic with some retained Austenite, Bainite & Carbides(5)Breakage guarantee ...
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