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C90300 | CuSn8Zn4

Numeric designationC90300
Chemical designationCuSn8Zn4
StateSintered bronze
EtchingMessingätzmittel

The sintered bronze with about 8% tin and 4% zinc was used in a plain bearing for which the pores serve as an oil reservoir. The etching develops an α-Cu microstructure with the typical twin grain boundaries.