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AS 2027 / Ni-Cr1-550 Ni Hard Liners Castings With HRC56 Hardness Quick Details 1.The hardness is more than HRC56. 2.GB/T 8263-1999, AS 2027/Ni-Cr1-550, AS 2027/Ni-Cr2-500, AS 2027/Ni-Cr4-600. Ni-hard ...