Phosphor Bronze
Overview
C51000 is a lead-free phosphor bronze, widely used for its excellent spring properties, fatigue resistance, and corrosion resistance. This wrought alloy is available in rod, bar, wire, strip, and sheet forms and meets lead-free requirements for many applications.
As a C51000 phosphor bronzesupplier, Triton Bronze & Metals stocks continuous cast bronze in round bar, flat bar, sheet, and more — all cut to length and shipped from US mills. Every order ships with a mill test report available upon request.
Chemical Composition — C51000
| Element | Content |
|---|---|
| Copper (Cu) | 93.7-95.6% |
| Tin (Sn) | 4-6% |
| Phosphorus (P) | 0.03-0.35% |
| Iron (Fe) | 0.10% max |
| Lead (Pb) | 0.05% max |
| Zinc (Zn) | 0.30% max |
Mechanical Properties
Physical Properties
| Property | Value |
|---|---|
| Density | 0.320 lb/in³ (8.86 g/cm³) |
| Melting Range | 1750-1920°F (954-1049°C) |
| Modulus of Elasticity | 16,000 ksi (110 GPa) |
| Thermal Conductivity | 40.0 BTU/ft·hr·°F (69.2 W/m·K) |
| Coefficient of Thermal Expansion | 9.9 × 10⁻⁶ /°F (17.8 × 10⁻⁶ /°C) |
| Electrical Conductivity | 15% IACS |
Applicable Specifications
- ✓ASTM B139 (Rod & Bar)
- ✓ASTM B103 (Plate, Sheet, Strip)
- ✓ASTM B159 (Spring Wire)
- ✓SAE J461 / J463
- ✓Federal QQ-B-750
Fabrication & Joining
| Process | Rating |
|---|---|
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Good |
Common Applications
- •Springs and spring contacts
- •Electrical connectors
- •Bellows and diaphragms
- •Fasteners
- •Perforated sheets
- •Chemical hardware
Frequently Asked Questions
What forms is C51000 Phosphor Bronze available in?+
We supply C51000 in Round Bar, Flat Bar, Sheet, Wire, Strip. All material is sourced from US mills, cut to length, and shipped directly to your facility.
What are the typical applications for C51000?+
C51000 is commonly used for springs and spring contacts, electrical connectors, bellows and diaphragms, fasteners. Contact us for application-specific recommendations.
Can I get a mill test report for C51000?+
Yes. Mill test reports (MTRs) are available upon request for all C51000 orders. We can also provide material certifications to meet your quality requirements.
Is C51000 available as continuous cast bronze?+
Yes. C51000 is produced via the continuous casting process, which delivers a dense, uniform grain structure with excellent mechanical properties. Continuous cast bronze provides tighter tolerances and better surface finish than sand castings.
Dimensional Tolerances
For standard finishing allowances, diameter tolerances, and concentricity data for continuous cast bronze products, see our tolerance reference.
View Tolerances & Finishing Allowances →Need Finished Parts?
Need C51000 machined to spec? We offer custom machined parts, bronze bushings, bearings, and wear components in any alloy we stock.
View Finished Parts & Components →Available Forms
- Round Bar
- Flat Bar
- Sheet
- Wire
- Strip
Need C51000?
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