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EN: CuCoBe / CuNiBe
UNS: C17410 / C17460
Standards: ASTM B768
Quick Detail:
C17410 and C17460 alloy is a precipitation-hardened beryllium-nickel copper alloy renowned for its exceptional balance of high strength, electrical/thermal conductivity, and corrosion resistance.
Key Characteristics & Advantages:
Corrosion Resistance:excellent in seawater, freshwater, and atmospheric conditions (corrosion depth: 0.01–0.14 mm/year)35. Resists sulfuric acid (<80% concentration) but vulnerable to ammonia/nitric acid36.
Special Characteristics:Non-magnetic, spark-free on impact. Retains properties from cryogenic (−196°C) to elevated temperatures (300°C).
Machinability: 20–40% of free-cutting brass (requires carbide tools with cooling).
Formability/Weldability: Excellent cold/hot workability (e.g., forging, extrusion). Compatible with TIG, laser, electron beam, and brazing techniques
Chemical composition C17410(wt,%):
| Be | Co | Ni | Al | Fe | Cu |
| 0.15-0.5 | 0.35-0.6 | <0.2 | <0.2 | <0.2 | Rem. |
| Chemical Composition C17460(wt,%): | |||||||
| Be | Ni | Zr | Sn | Al | Fe | Si | Cu |
| 0.15-0.5 | 1.0-1.4 | <0.5 | <0.25 | <0.2 | <0.2 | <0.2 | Rem. |
| Physical and Mechanical property: | |||||||
| Alloy | Temper | Tensile Strength | 50mm Elongation | Hardness | Eletric Conductivity | ||
| ksi | MPa | B,% | HV0.5 | HRB | %, IACS | ||
| C17410 |
1/2HT |
95-110 | 655-790 | 10-20 | 179-213 | 89-98 | >45 |
| C17410 |
HT |
110-130 | 760-895 | 7-17 | 220-287 | 95-100 | >45 |
| C17460 | 3/4HT | 115-135 | 790-930 | >11 | 98-105 | >50 | |
| C17460 | HT | 120-140 | 825-965 | >10 | 99-106 | >50 | |
Core Applications:
C17410 and C17460 strip is widely used in high-reliability industries: