Uns C72900 C729

| 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) | — | — | — |

| Property | Typical Value (annealed) | Typical Value (H900) | |----------|--------------------------|----------------------| | Tensile strength | 620 MPa (90 ksi) | 1 380 MPa (200 ksi) | | Yield strength (0.2 % offset) | 415 MPa (60 ksi) | 1 240 MPa (180 ksi) | | Elongation (A) | 30 % | 10 % | | Hardness (HRB) | 70 HRB | 44‑48 HRC | | Modulus of elasticity | ~200 GPa (29 Msi) | – | | Density | 7.75 g/cm³ (0.28 lb/in³) | – | | Corrosion resistance | Comparable to 304/316 in many environments, superior in chlorides when properly aged | Similar, but higher strength may reduce ductility in aggressive media | uns c72900 c729

The small niobium addition refines grain structure and improves hot workability. | Condition | Tensile Strength (MPa) | Yield

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. | Strength | Description | |----------|-------------| | |

| Strength | Description | |----------|-------------| | | Up to 200 ksi tensile, maintains strength to 400°F | | Non-beryllium | No special handling or health restrictions | | Corrosion resistant | Seawater, sour gas, chlorides | | Wear resistant | Low coefficient of friction, galling resistant | | Non-magnetic | Critical for downhole electronics / medical devices |