Cast Nickel-Aluminum Bronze C95500
The strongest common cast bronze — 95 ksi as cast, 110 ksi heat treated — for propeller hubs, seawater valve bodies, gears and the heaviest wear applications.
What C95500 Ni-Al Bronze is.
C95500 is the cast nickel-aluminum bronze. Nickel and iron at about 4 percent each give it 95 ksi tensile as cast and 110 ksi after heat treatment, together with the outstanding seawater, cavitation and wear resistance that make the alloy family the standard for marine propulsion and pump components. It is the cast counterpart of wrought C63000.
We machine C95500 components from certified B505 continuous-cast bar, as cast or heat treated (C95500HT).
Chemical composition.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 78.0 | — |
| Aluminium | Al | 10.0 | 11.5 |
| Nickel (incl. cobalt) | Ni | 3.0 | 5.5 |
| Iron | Fe | 3.0 | 5.0 |
| Manganese | Mn | — | 3.5 |
Values per ASTM B505/B505M-23 Table 10, Chemical Requirements (verified against the specification); B505 Table 11 requires the named elements to total 99.0 % (C93200) or 99.5 % (C95400, C95500) minimum. Confirm the edition called out on your purchase order with our estimating team.
Mechanical properties.
| Condition | Tensile strength, min (ksi) | Yield strength at 0.5 % extension, min (ksi) | Elongation, min (%) |
|---|---|---|---|
| As cast | 95 | 42 | 10 |
| Heat treated (C95500HT) | 110 | 62 | 8 |
Values per ASTM B505/B505M-23 Tables 1 and 9 (verified against the specification). Confirm the edition called out on your purchase order with our estimating team.
Specifications that apply.
How C95500 Ni-Al Bronze ships from Houston.
- Bushings, gears and wear rings
- Valve seats, discs and stems
- Pump impellers and wear plates machined from bar
- Non-sparking tooling
- Certified B505 solid and cored bar
C95500 Ni-Al Bronze fasteners we make.
Every item is manufactured to your drawing or standard in C95500 Ni-Al Bronze, imperial or metric, with an EN 10204 3.1 certificate.
What is C95500 nickel-aluminum bronze?
C95500 adds 4 percent nickel to the 11 percent aluminum, 4 percent iron base of C95400. The nickel stabilises the structure against dealuminification in seawater and, with the iron, forms hard kappa phases that give the alloy its wear and cavitation resistance. It is the alloy behind most ship propellers and the seawater valves and pumps on offshore platforms, and B505 continuous-cast bar makes it available for machined components without a pattern.
Conditions and machining
As cast, C95500 delivers 95 ksi tensile and 42 ksi yield; the heat-treated C95500HT condition raises those to 110 and 62 ksi with a small loss of ductility. Machinability is about 50 percent of free-cutting brass; carbide tooling and positive rake are recommended. Anti-seize is advisable on threaded assemblies, as with all aluminum bronzes.
Testing, certification and marking
- Tensile and hardness tested per lot on the finished product
- Grade or alloy marking by UNS number, condition and heat on the certificate and manufacturer's identification on every piece
- EN 10204 3.1 material test report with heat number and chemistry; 3.2 witness available
- Alloy identified by UNS number on the certificate
Nickel-Aluminum Bronze C63000
Steel-like strength in a bronze — 100 to 130 ksi as a fastener — with seawater, cavitation and wear resistance for propellers, pumps, valve seats and subsea hardware.
ASTM B505 continuous-cast barCast Aluminum Bronze C95400
The general-purpose cast aluminum bronze — 85 ksi as cast, 95 ksi heat treated — for heavy-duty bushings, gears, valve seats and wear parts.
ASTM B505 continuous-cast barBearing Bronze C93200 (SAE 660)
The workhorse bearing bronze — SAE 660 — for bushings, thrust washers and wear parts machined from continuous-cast bar.