Phosphor Bronze Alloy (C51000 / C52100)
Reliable Spring & Electrical Copper Solutions by Huaxiao-Alloy
1. What Is Phosphor Bronze?
Phosphor Bronze is a copper alloy containing tin and a small amount of phosphorus, designed to enhance strength, elasticity, wear resistance, and corrosion resistance. It is widely used in applications requiring stable spring performance, good electrical conductivity, and long service life.
At Huaxiao-Alloy, Phosphor Bronze is positioned as a balanced-performance engineering solution, ideal for electrical connectors, springs, bushings, and precision components, offering an excellent cost-performance alternative to beryllium copper.
2. Phosphor Bronze Grades & UNS Numbers
| Grade | UNS No. | Common Designation |
|---|---|---|
| C51000 | UNS C51000 | Phosphor Bronze (Low Tin) |
| C52100 | UNS C52100 | Phosphor Bronze (High Tin) |
Huaxiao-Alloy Engineering Insight:
C51000 provides better conductivity and formability.
C52100 offers higher strength and superior spring properties.
3. Chemical Composition
C51000 – Low Tin Phosphor Bronze
| Element | Content (%) |
|---|---|
| Copper (Cu) | Balance |
| Tin (Sn) | 4.2–5.8 |
| Phosphorus (P) | 0.03–0.35 |
C52100 – High Tin Phosphor Bronze
| Element | Content (%) |
|---|---|
| Copper (Cu) | Balance |
| Tin (Sn) | 7.5–8.5 |
| Phosphorus (P) | 0.03–0.35 |
4. Mechanical & Physical Properties
| Property | C51000 | C52100 |
|---|---|---|
| Tensile Strength | ~380 MPa | ~550 MPa |
| Electrical Conductivity | ~15% IACS | ~13% IACS |
| Hardness | ~110 HB | ~160 HB |
| Fatigue Resistance | Good | Excellent |
Huaxiao-Alloy supplies Phosphor Bronze in annealed, cold-worked, or spring-temper conditions.
5. Key Advantages of Phosphor Bronze
Excellent spring elasticity and fatigue resistance
Good corrosion resistance in industrial environments
Stable electrical performance
Good wear resistance and low friction
Cost-effective alternative to BeCu
6. Typical Applications
Huaxiao-Alloy supplies Phosphor Bronze for:
Electrical connectors and contacts
Springs, clips, and terminals
Bushings and bearings
Switch components
Precision stamped parts
Phosphor Bronze is widely used where reliability and repeatable performance are critical.
7. Available Forms & Supply Capabilities
Sheets & Strips
Bars & Rods
Wires
Supported Standards:
ASTM B103 / ASTM B139
UNS C51000 / C52100
EN CW451K / CW453K
Huaxiao-Alloy Capabilities:
Precision slitting and leveling
Spring temper supply
Export-grade packaging
8. Phosphor Bronze vs Beryllium Copper
| Property | Phosphor Bronze | Beryllium Copper |
|---|---|---|
| Strength | Medium–High | Very High |
| Elasticity | Excellent | Excellent |
| Conductivity | Moderate | Higher |
| Cost | Lower | Higher |
Huaxiao-Alloy Recommendation:
Choose Phosphor Bronze when you need stable spring performance at a controlled cost.
9. Standards & Quality Assurance
ASTM / UNS / EN compliance
ISO quality management
ROHS & REACH available
Full traceability
Huaxiao-Alloy ensures consistent mechanical and electrical performance.
Yes. Especially C52100, which offers excellent fatigue resistance.
Yes. We provide fully hardened and spring-temper materials.
Yes. It performs well in most industrial and atmospheric environments.
11. Why Choose Huaxiao-Alloy?
One-stop supplier for copper and copper alloys
Expertise in spring and electrical materials
Custom temper and precision processing
Stable supply for mass production
Engineering-driven material solutions
Huaxiao-Alloy balances performance, cost, and reliability.
12. Get a Quote – Spring & Electrical Copper Solutions
📧 Email: [email protected]
📱 WhatsApp: +1 (579) 300-2733
Work with Huaxiao-Alloy to source reliable Phosphor Bronze solutions for your applications.
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