Our C72900 copper Products

Chemical composition

The chemical composition of C72900 is as follows:

· Nickel (Ni): 14.5 - 15.5%

· Tin (Sn): 7.5 - 8.5%

· Copper (Cu): Minor amount

Copper and specified elements: 99.90%

· Other elements: Maximum 0.10%

C72900 is a spinodal hardening type copper-nickel-tin alloy (Copper-Nickel-Tin Spinodal Alloy). Through a unique Spinodal decomposition strengthening mechanism, it achieves environmentally friendly without beryllium while maintaining superior performance comparable to beryllium copper. It is widely regarded as an ideal substitute for beryllium copper.

International standards: ASTM B740, AMS 4597 (aviation material standard)

Core Feature

High strength: Through cold processing and aging treatment, the tensile strength can reach over 900 MPa, comparable to that of some steel materials.

Corrosion resistance: Exhibits excellent performance in seawater and chemical environments, and is resistant to stress corrosion cracking (superior to ordinary bronze).

Electrical/thermal conductivity: Retains the excellent electrical conductivity of copper alloys (approximately 15%-20% of pure copper), suitable for electronic components.

Wear resistance: The high tin content makes it suitable for friction components such as bearings and gears.