Aluminum bronze alloys
Family of copper alloys with 9–14% aluminum (plus iron) reaching mechanical strength comparable to medium-carbon steel while keeping excellent corrosion and wear resistance in marine environments.
Family characteristics
- 9–14% aluminum and ~4% iron for structural reinforcement
- Strength comparable to medium-carbon steel
- Exceptional marine corrosion resistance
- High wear, abrasion, and galling resistance
- Cavitation and erosion resistance
- Thermal and oxidation stability at elevated temperatures
- Low magnetic permeability
- Good weldability
Typical applications
- Gears, load bushings, and bearings
- Naval and offshore components
- Pumps, impellers, and valves
- Wear plates and rollers
- Desalination equipment
Available alloys
- BM 863UNS C86300SAE 430BASTM B147-8C
High-strength copper-zinc-aluminum-manganese alloy balancing hardness, ductility, and corrosion resistance for critical mechanical components.
- BM 954UNS C95400ASTM B505ASTM B271
Aluminum-iron bronze with excellent balance between fatigue resistance, wear, and ductility — the family reference for structural parts and molds.
- BM 300UNS C95900ASTM B505
High-aluminum bronze (12.5–13.5%) with very high compressive strength, designed for guide bushings, wear plates, and operations without continuous lubrication.
- BM 959UNS C95900ASTM B505
BM 300 variant tuned for tube-forming, bending rollers, and similar non-impact operations.
- BM 380
Special ultra-hard alloy (36–40 HRC) with compressive strength up to 1,579 MPa for precision stamping dies and deep-drawing tooling.
- BM 340
Duplex-structure alloy (13.5–14% Al) with 1,230–1,351 MPa compressive strength, optimized for forming mandrels and drawing tools.