| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation % (A) | Hardness | |-----------|------------------------|----------------------|------------------|----------| | | 620 MPa | 415 MPa | 30 % | 70 HRB | | H900 | 1380 MPa | 1240 MPa | 10 % | 44‑48 HRC | | H1025 | 1150 MPa | 1060 MPa | 12‑14 % | 38‑42 HRC | | H1075 | 950 MPa | 800 MPa | 15‑18 % | 34‑38 HRC | | DAH | 1300 MPa | 1150 MPa | 11 % | 42‑45 HRC | | Impact (Charpy V‑Notch, 0 °C) | — | — | — | 60‑80 J (H1025) | | Modulus of Elasticity | ≈ 200 GPa (29 Msi) | — | — | — | | Density | 7.75 g cm⁻³ (0.28 lb in⁻³) | — | — | — |
. Unlike standard alloys that require rapid quenching, this material undergoes a phase transformation that creates a nanostructure of nickel and tin. This results in: Extreme Strength: Yield strengths ranging from 100 to 180 ksi (690 to 1241 MPa) [3, 7]. Anti-Galling: Exceptional lubricity and wear resistance, making it ideal for moving parts that might otherwise seize up [4, 8]. Non-Sparking & Non-Magnetic: Safe for use in explosive environments like gas rigs [4, 8]. Toxicity-Free: It is a leading replacement for beryllium copper, offering similar performance without the health risks associated with beryllium dust [2, 12]. 2. Key Performance Attributes Property Performance Benefit Corrosion Resistance Resists most sour (H2S), CO2, and acidic environments; immune to hydrogen embrittlement [5, 12]. Thermal Stability Retains strength at both cryogenic temperatures (-193°F) and elevated heat (up to 572°F) [5, 12]. Machinability Known for excellent machinability compared to other high-strength nickel alloys [4, 8]. 3. Critical Industrial Applications Because it thrives under severe loading and corrosive conditions, C72900 is a "problem-solver" alloy in several sectors: Aerospace: Used for landing gear bushings and aircraft bearings because it won't gall under high pressure [3, 7]. Oil & Gas: Found in uns c72900 c729
C72900 exhibits spinodal hardening – a unique decomposition of the Cu-Ni-Sn solid solution during aging, producing a coherent, nano-scale modulated structure that resists softening up to ~400°C. | Condition | Tensile Strength (MPa) | Yield
: Typically consists of approximately 15% Nickel and 8% Tin , with the balance being Copper . producing a coherent