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    29

    2026 - 07

    GB/T 42124.3-2025 Standard for Tolerances of Castings: Replaces GB/T 6414-2017

    GB/T 42124.3-2025 has replaced GB/T 6414-2017. This article compiles the tolerance tables for DCTG4-DCTG10, recommended grades for investment casting, GCTG geometric tolerances, and RMAG E machining allowances based on the official standard text.

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