303049 Hardened Chrome Liner (6" EWCO 446), forged from high chromium cast iron with thick chrome plating (ASTM B488 SC-2), heat-treated to HRC≥62 hardness, salt spray tested 1000hrs corrosion-free, API 7K compliant mud pump compatibility, ISO 15154-E erosion resistance, direct replacement for Buckhorn 303049.
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