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Copper Cu: Allowable residual content ≤ 0.30
9CrSi steel mechanical properties hardness: annealing, 241 ~ 197HB, indentation diameter 3.9 ~ 4.3mm; 187 ~ 229HB (for thread tools); quenching, ≥ 62HRC
Mainly used in the manufacture of low-speed cutting tools (such as woodworking tools, bench tools, drills, milling cutters, broaches, etc.) and measuring tools (such as calipers, micrometers, block gauges, templates, etc.). Measuring tool steel requires high hardness (62 ~ 65HRC), high wear resistance, sufficient toughness, high heat hardness (ie, the cutting tool can maintain high hardness at high temperature); to ensure the accuracy of measurement, the measuring tool is required The cutting tool steel has good dimensional stability.