Bronze Alloy Selection:
Phosphor, Aluminum, Tin & Bearing Bronze
Compare bronze families by product form, spring behavior, wear duty and exposure before releasing the grade, temper and material records. For finished parts, use the dedicated phosphor bronze stampings sourcing page.
- Marine-Grade Corrosion Resistance
- Self-Lubricating Bearing & Bushing Grade
- Initial Response Target: 24 Working Hours
RFQs Reviewed for Marine, Heavy Machinery & Industrial Applications OEMs Worldwide
Material Overview
Bronze alloys — copper combined with tin, aluminum or phosphorus — deliver exceptional wear resistance, fatigue strength and corrosion immunity, especially in seawater. We process the four most-specified families: phosphor bronze (C51000), tin-lead bronze (C54400), aluminum bronze (QAl9-4 / C95400) and bearing bronze (C93200 / SAE 660) — covering springs, marine propellers, heavy gears and self-lubricating bushings.
This page covers alloy-family selection rather than finished-part sourcing. Review the coil and stamping tooling DFM guide for strip tolerance, grain, burr and die decisions. The linked spring-profile tool qualification scenario is illustrative only and does not report a customer result.
Physical Properties
- Thermal Conductivity
- 75 W/m·K
- Electrical Conductivity
- 15% IACS
- Specific Heat
- 380 J/kg·K
- Young's Modulus
- 110 GPa
- Density
- 8.80 g/cm³
- Thermal Expansion
- 18.0 µm/m·K
Bronze Alloy Grade Specifications
Mechanical and chemical properties of available grades. All values measured at room temperature (20°C) per ASTM B103 / B139 / B148 / B584 international standards.
| Grade | Standard | Composition | Tensile MPa | Yield MPa | Elong. % | Hardness | Key Characteristics |
|---|---|---|---|---|---|---|---|
| C51000 | ASTM B103 | Cu 94.8%, Sn 5%, P 0.2% | 450 | 275 | 15 | HV 130 | Phosphor bronze, springs & contacts |
| C54400 | ASTM B139 | Cu 88%, Sn 4%, Pb 4%, Zn 4% | 380 | 275 | 20 | HV 110 | Free-cutting bearing bronze |
| QSn6.5-0.1 | GB/T 5231 | Cu 93%, Sn 6.5%, P 0.1% | 550 | 420 | 12 | HV 180 | High-tension springs & connectors |
| QAl9-4 | GB/T 5231 | Cu 86%, Al 9%, Fe 4% | 590 | 245 | 12 | HB 170 | Aluminum bronze, marine propellers |
| C95400 | ASTM B148 | Cu 85%, Al 11%, Fe 4% | 517 | 241 | 12 | HB 170 | Heavy-duty gears, wear plates |
| C93200 | ASTM B584 | Cu 83%, Sn 7%, Pb 7%, Zn 3% | 241 | 124 | 20 | HB 65 | SAE 660, bearings & bushings |
Tensile Strength by Grade
Visual comparison of ultimate tensile strength (MPa) across available bronze grades.
What We Can Do With This Material
Available Surface Treatments
- Natural Patina
- Polishing
- Oil Sealing
- Tin Plating
- Nickel Plating
- Sandblasting
Common Applications
- Marine Hardware
- Bearings & Bushings
- Gears & Worm Wheels
- Valves & Pumps
- Heavy Machinery
- Pressure Vessels
Start Your Bronze Fabrication Project
Submit your CAD drawings for RFQ review. The initial response target is within 24 working hours; DFM and quotation timing depend on file completeness and engineering scope. Grade, surface treatment and material-traceability requirements are confirmed before order placement.
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