C729, ToughMet 3, Cu-15Ni-8Sn.
The small niobium addition refines grain structure and improves hot workability. | Property | Value | |----------|-------| | Density | 0.318 lb/in³ (8.80 g/cm³) | | Electrical Conductivity | 6–10% IACS | | Thermal Conductivity | 25–35 W/m·K (at 20°C) | | Modulus of Elasticity | 18–19 Msi (124–131 GPa) | | Melting Range | 1900–2050°F (1040–1120°C) | | Magnetic Permeability | < 1.01 (non-magnetic) | 4. Mechanical Properties (by Temper) C72900 is available in several tempers, with AT (Age Hardened, Turned) and XT (Extreme Temper, cold worked + aged) being most common. uns c72900 c729
1. Overview & Designation UNS C72900 is a copper-nickel-tin (CuNiSn) spinodal alloy. It is often marketed under trade names such as ToughMet® 3 (produced by Materion) and is also referred to as CX95 in some specifications. C729, ToughMet 3, Cu-15Ni-8Sn