C52100 Phosphor Bronze: A Comprehensive Guide for Precision Engineering Applications
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Customization Phosphor bronze alloys bearings- Sleeve & Flange More, C52100
C52100 phosphor bronze stands as a premier copper alloy in industrial manufacturing, renowned for its exceptional mechanical properties and corrosion resistance. As a leading manufacturer of custom machined bronze parts, we specialize in leveraging this versatile material for high-performance applications. Below, we break down its chemical composition, mechanical advantages, and global industrial significance.

C52100 Chemical Composition & Material Standards
C52100 (UNS designation) belongs to the ASTM B103/B139 standard family and features a precise elemental blend:
Copper (Cu): 90–92% (base metal)
Tin (Sn): 7.0–9.0% (enhances strength and hardness)
Phosphorus (P): 0.03–0.35% (improves elasticity and acts as a deoxidizer)
Trace elements: Zinc (Zn), iron (Fe), and lead (Pb) (<0.5% combined)
This optimized formulation ensures superior performance in demanding environments.
Phosphor Bronze Key Advantages
Key Properties of C52100 Phosphor Bronze
- Mechanical Strength
- High fatigue resistance and elastic limit for springs and bearings.
- Cold-working capabilities allow hardness increases up to 250 HV.
- Corrosion Resistance
- Withstands saltwater, industrial atmospheres, and acidic conditions.
- Machinability
- Excellent cold-forming properties for stamping, bending, and deep drawing.
- Annealed states improve ductility, while hardened states boost wear resistance.


Industrial Applications of C52100
C52100’s balanced properties make it ideal for:
- Springs & Electrical Contacts: High-conductivity springs in relays and switches.
- Marine Components: Pump shafts, valve seats, and seawater-resistant fasteners.
- Precision Bearings: Low-friction bushings and thrust washers.
- Connectors: Corrosion-resistant terminals and PCB contacts.
c52100 chemical composition, CuSn8 Bronze Bearings Material Equivalents, C51000, 510 Bronze, Phosphor Bronze 8% C
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Phosphor bronze alloys, C52100 Alloy, C521 Phosphor bronze – Cast Bronze Bearings
Phosphor bronze alloys such as C52100, also known as C521, consist of copper with 0.50–11.00% of tin and 0.01–0.35% phosphorus. The tin increases the corrosion resistance and strength of the alloy. The phosphorus increases the wear resistance and stiffness of the alloy.
Manufacturing Considerations
- Welding: Requires specialized techniques like brazing or soldering due to phosphorus-induced brittleness.
- Machining: Use sharp tools and adequate lubrication to prevent work hardening.
- Quality Control: Strict phosphorus content monitoring ensures optimal ductility.
Why Choose C52100?
As a trusted bronze bearing manufacturer, we utilize C52100 for its unmatched blend of strength, elasticity, and environmental resilience. Whether you need corrosion-resistant marine components or high-cycle springs, our precision machining capabilities deliver tailored solutions.Explore our custom bronze parts portfolio or request a material datasheet today to optimize your next project.
Global Material Equivalents
| Country/Region | Standard | Equivalent Grade |
|---|---|---|
| USA | ASTM | C52100 |
| Japan | JIS | C5210 |
| Europe | EN | CuSn8 |
| China | GB | QSn8-0.3 |
Phosphor Bronze Alloy Bearing Bushing Material: Alloy Code, Mechanical Properties, and Performance Characteristics
Phosphor bronze alloys are a preferred material choice for bearing bushings due to their excellent mechanical properties and performance characteristics. Here, we’ll explore the specifics of these alloys, including typical alloy codes, their mechanical properties, and how these attributes translate into superior performance in various applications.
Common Phosphor Bronze Alloy Codes
- C51000 (CuSn5) Phosphor Bronze:
- Tin Content: Approximately 5%
- Phosphorus Content: 0.15-0.35%
- Applications: General-purpose grade used for fasteners, springs, and switch parts.
- C52100 (CuSn8) Phosphor Bronze:
- Tin Content: Approximately 8%
- Phosphorus Content: 0.03-0.35%
- Applications: Higher strength applications including heavy-duty electrical connectors and bushings.
- C54400 (CuSn4Pb4Zn4) Phosphor Bronze:
- Tin Content: 4%
- Lead and Zinc Content: Each 4%
- Applications: Highly machinable grade used for complex shaped components requiring easy machining.
These alloys are standardized under ASTM B139/B139M, which provides specifications for rolled, drawn, and forged phosphor bronze for general applications.
















