Phosphor Bronze Washers & Spring Washers

Comprehensive Overview of Precision Phosphor Bronze Washers

We are a specialized manufacturer and global exporter of Phosphor Bronze Washers and Phosphor Bronze Spring Washers, serving industries that demand exceptional corrosion resistance combined with reliable spring performance. Leveraging our decades of expertise in non-ferrous metal forming, we produce washers from high-performance phosphor bronze alloys, primarily C52100 Phosphor Bronze for its superior spring properties and fatigue resistance, and C51000 Phosphor Bronze for general-purpose applications requiring good elasticity and corrosion resistance. Our comprehensive range includes precision Phosphor Bronze Flat Washers for load distribution and Phosphor Bronze Spring Washers for vibration-resistant locking, all manufactured under our ISO 9001:2015 certified quality system with complete material traceability.

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Phosphor Bronze Flat Washers – Precision Load Distribution

Phosphor Bronze Flat Washers are engineered to distribute the load of a fastener, prevent surface damage, and provide a smooth bearing surface. Their exceptional corrosion resistance and non-magnetic properties make them ideal for marine, electrical, and chemical applications.

Applications of Phosphor Bronze Flat Washers

• Marine Engineering: Under bolt heads and nuts on ships, docks, and offshore structures

• Electrical Equipment: Busbar connections, transformer assemblies, and electrical panels

• Chemical Processing: Equipment in corrosive chemical environments

• Food Processing: Machinery where corrosion resistance and non-toxicity are required

• Architectural Hardware: Decorative and functional applications in bronze fittings

Phosphor Bronze Flat Washer Specifications

Standard Sizes: M3 to M48, #4 to 2″ nominal bolt sizes
Thickness Range: 0.5mm to 12mm
Standards: ISO 7089, ISO 7090, DIN 125, ASME B18.22.1
Tolerances: Normal (±0.2mm) and Precision (±0.05mm) grades available

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Phosphor Bronze Spring Washers – Vibration-Resistant Locking

Phosphor Bronze Spring Washers provide essential spring pressure in bolted joints to prevent loosening under vibration, thermal cycling, or dynamic loads. Their excellent fatigue resistance and non-magnetic properties make them perfect for critical applications.

Applications of Phosphor Bronze Spring Washers

• Marine Engines: Vibration-prone applications on boats and ships

• Electrical Machinery: Motor assemblies and generator connections

• Pump and Valve Systems: Maintaining bolt tension in fluid handling equipment

• Aerospace Components: Non-magnetic locking in instrumentation

• Electronic Enclosures: Preventing loosening in sensitive equipment

Spring Washer Types & Specifications

Phosphor Bronze Spring Washer Technical Properties

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Manufacturing Processes & Quality Control

Our phosphor bronze washers are manufactured through precision processes:

Flat Washer Production:

1. Material Selection: Certified phosphor bronze strip/coil

2. Precision Blanking: High-speed stamping presses

3. Piercing: Precision tooling for accurate inner diameter

4. Deburring: Automated tumbling and edge radiusing

5. Heat Treatment: Stress relieving for dimensional stability

6. Surface Finishing: Optional tin plating or passivation

Spring Washer Production:

1. Precision Blanking: Custom tooling for specific washer types

2. Forming: Specialized dies for spring geometry

3. Heat Treatment: Spring tempering for optimal performance

4. Stress Relieving: To maintain spring characteristics

5. Surface Treatment: Corrosion protection if required

6. Load Testing: Sample testing for spring performance

Quality Assurance Tests:

• Dimensional Inspection: 100% check for OD, ID, and thickness

• Material Verification: Mill Test Certificates for all material

• Hardness Testing: Rockwell and Vickers hardness verification

• Spring Performance: Load-deflection testing on sample lots

• Salt Spray Testing: Corrosion resistance validation per ASTM B117

• Surface Finish: Visual and microscopic inspection

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Technical Data & Performance Specifications

Load Distribution Characteristics

Environmental Performance

• Salt Spray Resistance: 500+ hours without red corrosion

• Temperature Range: -50°C to +220°C continuous service

• Chemical Resistance: Excellent against seawater, acids, alkalis

• Galvanic Compatibility: Compatible with copper, bronze, brass

• Non-Magnetic Properties: Mu < 1.05

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Frequently Asked Questions (FAQ)

Q1: Why choose phosphor bronze washers over stainless steel?
Phosphor bronze washers offer superior corrosion resistance in marine environments, excellent non-galling properties, inherent lubricity, and non-magnetic characteristics. They are also non-sparking, making them safer in explosive atmospheres.

Q2: What is the difference between C52100 and C51000 for spring washers?
C52100 has higher tin content (8% vs 5%), providing superior spring properties, higher fatigue strength, and better wear resistance. It is the preferred choice for high-performance spring applications, while C51000 is suitable for general-purpose applications.

Q3: Can you manufacture custom-sized phosphor bronze washers?
Yes, we specialize in custom washer manufacturing. We can produce washers to your exact specifications including special outer diameters, inner diameters, thicknesses, and unique profiles. Send us your drawings for a prompt quotation.

Q4: How do phosphor bronze spring washers perform in high-temperature applications?
Phosphor bronze spring washers maintain their spring properties up to 220°C (428°F), outperforming many other non-ferrous spring materials. For higher temperatures, special heat-resistant alloys may be recommended.

Q5: What plating options are available for phosphor bronze washers?
While phosphor bronze washers are typically used bare, we can provide:

• Electro-tin plating for enhanced corrosion protection

• Nickel plating for specific aesthetic requirements

• Silver plating for electrical applications

• Passivation treatments for maximum corrosion resistance

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Why Choose Our Phosphor Bronze Washers?

• Material Expertise: Deep knowledge of phosphor bronze metallurgy and spring design principles

• Precision Manufacturing: Advanced stamping and forming technology for consistent quality

• Comprehensive Testing: Rigorous quality control including spring performance validation

• Custom Solutions: Ability to produce custom designs and special configurations

• Technical Support: Engineering assistance for application-specific requirements

• Global Certification: ISO 9001:2015 certified with material traceability

• Competitive Pricing: Cost-effective manufacturing without compromising quality

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Call to Action – Contact Us Today

Ensure the reliability of your assemblies with high-performance phosphor bronze washers. Contact us for quotations or technical consultation.

• Request a Quote: Email your specifications to sales@jambrass.com for prompt quotation

• Call Directly: +91-22-43449300 / +91-22-43449323 (Monday-Saturday, 9:00 AM – 6:00 PM IST)

• Office Address: 1406, 14th Floor, Dalamal Tower, Nariman Point, Mumbai – 400021, Maharashtra, India

• Factory Address: Plot 10B, GIDC Industrial Estate, Shanker Tekari, Udyognagar, Jamnagar, Gujarat – 361004

• Samples Available: Contact us for evaluation samples

• Technical Support: Our engineers are available for application consultation

We look forward to providing you with the highest quality phosphor bronze washers for your most demanding applications.