C53400 Phosphor Bronze B-1
C53400 Phosphor Bronze B-1
At conexmetals.com, we provide C53400 Phosphor Bronze B-1, a high-quality wrought bronze alloy composed of copper, tin, and phosphorus. This B-1 grade is specifically formulated for applications requiring excellent corrosion resistance, high strength, and superior wear properties, while maintaining outstanding machinability.
It is widely used in bearings, bushings, electrical connectors, gears, valves, and precision industrial components where reliability and performance are critical.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Copper (Cu + Named Elements) | 99.5 (min) | Rem |
| Tin (Sn) | 6.0 | 7.0 |
| Lead (Pb) | – | 0.35 |
| Zinc (Zn) | – | 1.0 |
| Iron (Fe) | – | 0.15 |
| Phosphorus (P) | 0.03 | 0.35 |
Key Notes:
Tin improves hardness, strength, and corrosion resistance.
Phosphorus enhances wear resistance and fatigue strength.
Small amount of lead improves machinability for precision components.
Mechanical Properties (Typical at 20°C)
| Form | Temper | Code | Tensile Strength (ksi) | Yield Strength 0.5% (ksi) | Elongation (%) | Rockwell B |
|---|---|---|---|---|---|---|
| Rod / Wire | Half Hard | H02 | 55 | 38 | 28 | 65 |
| Rod / Wire | Hard | H04 | 70 | 55 | 20 | 80 |
| Flat Products | Spring | H08 | 95 | 80 | 4 | 90 |
Practical Insights:
Excellent for dynamic and static loads.
Retains shape and strength even under long-term stress.
High fatigue resistance makes it suitable for moving mechanical parts.
Physical Properties
| Property | Value |
|---|---|
| Melting Point (Liquidus) | 1800–1830°F |
| Melting Point (Solidus) | 1720–1750°F |
| Density @ 68°F | 0.33 lb/cu in |
| Specific Gravity | 8.9 |
| Electrical Conductivity | 18–20% IACS |
| Thermal Conductivity | 50 Btu/sq ft/ft/hr/°F |
| Thermal Expansion (68–572°F) | 9.6 × 10⁻⁶ /°F |
| Modulus of Elasticity | 15,000 ksi |
| Modulus of Rigidity | 5,500 ksi |
Notes:
Suitable for electrical connectors due to moderate conductivity.
Thermal stability ensures dimensional consistency in varying temperatures.
Fabrication & Machining
| Process | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Cold Working | Good |
| Machinability | 85% Rating |
Fabrication Tips:
Use conventional bronze machining techniques.
Avoid high-temperature welding; prefer mechanical fastening or brazing.
Annealing restores ductility after extensive cold working.
Thermal Treatment
| Process | Min Temp (°F) | Max Temp (°F) |
|---|---|---|
| Annealing | 900 | 1200 |
Benefits:
Reduces internal stresses.
Improves ductility and workability.
Applications
C53400 Phosphor Bronze B-1 from conexmetals.com is ideal for:
Bearings & Bushings – Superior wear resistance and friction performance.
Electrical Connectors – High strength, corrosion resistance, and excellent machinability.
Gears & Pinions – High fatigue strength for precise motion systems.
Valves, Shafts & Sleeve Bearings – Long-lasting corrosion protection and reliability.
Screw Machine Components – Smooth machining and precision manufacturing.
Marine & Industrial Applications – Excellent performance in humid or corrosive environments.
Key Benefits for Manufacturers:
Consistent mechanical and physical properties.
Reduced production costs due to excellent machinability.
Long-term reliability in demanding applications.
Specifications
| Form | Standard | Description |
|---|---|---|
| Rod / Bar / Shapes | ASTM B139/B139M | Phosphor Bronze Rods, Bars & Shapes |
| Plate / Sheet / Strip | ASTM B103/B103M | Phosphor Bronze Plate, Sheet, Strip & Rolled Bar |
| Bearings & Bushings | MIL-B-13501 | Brass & Bronze Bearings and Bushings |
| General | SAE J461 / J463 | Wrought & Cast Copper Alloys |
| Strip (Cold Rolled) | AMS 4520 | Bronze Strip, Cold Rolled, Half Hard |
