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C95800 Nickel-Aluminum Bronze: Properties and Applications
C95800 nickel-aluminum bronze is a high-strength copper alloy known for its excellent corrosion resistance and mechanical properties.
• Copper (Cu): ≥78.0%
• Nickel (Ni): 4.0-5.0%
• Iron (Fe): 3.5-4.5%
• Aluminum (Al): 8.5-9.5%
• Lead (Pb): ≤0.03%
• Silicon (Si): ≤0.1%
• Manganese (Mn): 0.8-1.5%
C95800 is widely used in applications requiring high strength and corrosion resistance, such as:
• Marine and Offshore: Components exposed to seawater, including propeller hubs and valves.
• Chemical Processing: Equipment exposed to corrosive media, such as acids and chlorides.
• Filter Castings: Used in Y-type strainers and other filtration systems.
Standard Procedure for Microhardness Testing
1. Specimen Selection: Select representative samples from the C95800 nickel-aluminum bronze castings. Ensure the samples are free from surface defects and contaminants.
2. Surface Preparation: Polish the specimen surfaces to a mirror finish using fine-grit sandpaper and diamond paste. This step is crucial to ensure accurate hardness measurements.
1. Microhardness Tester: Use a calibrated microhardness tester equipped with Knoop and Vickers indenters.
2. Calibration: Ensure the testing machine is calibrated according to ASTM E384 standards. Use reference hardness test blocks for verification.
1. Indentation: Apply the selected load to the specimen surface using the Knoop or Vickers indenter. Maintain the load for a specified dwell time, typically 10-15 seconds.
2. Measurement: Measure the length of the indentation diagonals using an optical microscope or digital imaging system. Calculate the hardness value using the appropriate formula for Knoop or Vickers hardness.
