Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of c34000 phosphor bronze in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
C34000, also known as Phosphor Bronze, is a high-performance copper-tin-phosphorus alloy renowned for its exceptional strength, corrosion resistance, and wear resistance. Widely used in mechanical, electrical, and marine industries, C34000 delivers excellent spring properties, high fatigue resistance, and reliable performance in challenging environments. Available in sheets, rods, tubes, and custom profiles, it is an ideal material for bearings, washers, gears, springs, and connectors.
Common aliases include Phosphor Bronze C340, C340 Phosphor Bronze, ASTM B103, UNS C34000, making it easy to find and order globally.
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Chemical Composition (Typical %)
| Element | Cu | Sn | P | Pb | Zn | Fe | Others |
|---|---|---|---|---|---|---|---|
| Content | Balance | 9–10 | 0.03–0.35 | ≤0.05 | ≤0.05 | ≤0.20 | ≤0.05 |
Mechanical Properties
| Property | Unit | Typical Value |
|---|---|---|
| Tensile Strength | MPa / ksi | 450–550 / 65–80 |
| Yield Strength | MPa / ksi | 250–350 / 36–50 |
| Elongation | % | 15–30 |
| Hardness | HB | 90–120 |
| Density | g/cm³ / lb/in³ | 8.8 / 0.318 |
| Electrical Conductivity | % IACS | 15–20 |
| Melting Point | °C / °F | 890–950 / 1634–1742 |
Available Specifications
| Form | Standard Dimensions | Notes |
|---|---|---|
| Sheet / Plate | 0.2–10 mm thickness | Custom cut-to-size available |
| Rod / Bar | 3–120 mm diameter | Hot-rolled & cold-drawn options |
| Tube | 6–60 mm outer diameter | Seamless & welded options |
| Wire | 0.5–10 mm diameter | Drawn wire with high surface finish |
Tolerances: As per ASTM B103 / ASTM B505 standards.
Surface Finish: Polished, mill finish, or custom machining available.
Key Features
High Strength & Durability – Maintains mechanical integrity under high stress.
Excellent Wear Resistance – Ideal for bearings, gears, and springs.
Good Corrosion Resistance – Resistant to seawater, industrial atmospheres, and mild acids.
Superior Fatigue Resistance – Reliable for repeated cyclic loading.
Good Electrical Conductivity – Suitable for electrical connectors and terminals.
Products Applications
Electrical Industry: Connectors, terminals, switches, springs.
Mechanical Components: Bearings, washers, gears, bushings, springs.
Marine Applications: Propeller components, fasteners, fittings.
Aerospace & Automotive: High-performance mechanical parts.
Industrial Machinery: Valves, compressors, pumps, and hydraulic components.
Copper Alloy Performance Comparison Table
| Property / Alloy | C34000 Phosphor Bronze | C36000 Brass | C35300 Beryllium Copper | C26800 Tin Bronze |
|---|---|---|---|---|
| Tensile Strength | 450–550 MPa | 350–450 MPa | 1000–1200 MPa | 350–450 MPa |
| Yield Strength | 250–350 MPa | 200–300 MPa | 900–1100 MPa | 200–300 MPa |
| Elongation | 15–30% | 30–45% | 2–10% | 20–30% |
| Hardness | HB 90–120 | HB 70–100 | HB 200–300 | HB 80–100 |
| Wear Resistance | Excellent | Good | Excellent | Good |
| Corrosion Resistance | Excellent | Moderate | Excellent | Good |
| Electrical Conductivity | 15–20% IACS | 28–32% IACS | 20–25% IACS | 12–18% IACS |
| Machinability | Good | Excellent | Moderate | Good |
| Typical Applications | Bearings, Springs, Electrical connectors, Gears, Marine hardware | Plumbing, Decorative, Electrical fittings | Springs, High-performance connectors, Aerospace components | Bearings, Bushings, Marine components |
C34000: Bearings, gears, springs, electrical connectors, marine hardware.
C36000: Valves, plumbing fittings, decorative components, musical instruments.
C35300: Aerospace connectors, springs, high-performance electronic contacts.
C26800: Marine bearings, bushings, valve components, pump parts.
Inspection & Quality Assurance
C34000 products undergo strict quality control systems including:
Chemical composition analysis (Spectrometer & Wet Chemistry).
Mechanical property testing (Tensile, Hardness, Fatigue tests).
Surface inspection for defects, oxidation, and dimensional accuracy.
Compliance with ISO 9001, SGS, TUV, and other third-party certifications.
Product Delivery Standards
Packing: Wooden crates, pallets, or anti-oxidation wrapping for export.
Marking: ASTM / UNS grade, size, batch number, and heat number.
Lead Time: Typically 2–4 weeks depending on order quantity.
Customization: Cutting, machining, and polishing services available.
For C34000 Phosphor Bronze inquiries, pricing, and custom orders:
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
Q1: How does the phosphorus content in C34000 affect its mechanical and electrical properties?
A1: Phosphorus in C34000 acts as a deoxidizer and improves wear resistance and fatigue strength. It slightly reduces electrical conductivity compared to pure copper but enhances spring and bearing performance, making it ideal for cyclic loading components.
Q2: What heat treatment or annealing options are available for C34000?
A2: C34000 can be annealed at 350–400°C to improve ductility while maintaining strength. Full annealing and stress-relieving processes are used depending on form (sheet, rod, tube). Cold working can further enhance hardness and tensile strength.
Q3: How does C34000 perform in marine or corrosive environments?
A3: C34000 exhibits excellent corrosion resistance in seawater, mild acids, and industrial atmospheres due to its tin-phosphor composition. For highly aggressive environments, protective coatings or regular maintenance can extend service life.
Q4: Can C34000 be welded, soldered, or brazed without compromising properties?
A4: Yes, brazing and soldering are commonly used. Fusion welding is possible but requires controlled heat input to avoid overaging or reduced fatigue strength. Post-weld annealing is recommended for critical mechanical parts.
Q5: What makes C34000 suitable for high-precision mechanical components compared to other bronzes?
A5: Its combination of high strength, wear resistance, fatigue resistance, and dimensional stability allows it to maintain tolerances in bearings, gears, washers, and springs under repetitive stress, outperforming standard tin or aluminum bronzes in precision applications.
Q6: How does C34000 compare to C51900 (high-phosphorus bronze) in electrical applications?
A6: C51900 has higher phosphorus content, offering better electrical conductivity and wear resistance. C34000 balances mechanical strength and conductivity, making it more versatile for spring, connector, and structural components rather than purely electrical contacts.
Q7: What international standards ensure C34000 quality and consistency?
A7: C34000 complies with ASTM B103 (sheet/plate), ASTM B505 (rod/bar), UNS C34000, and ISO equivalents. Certificates like ISO 9001, SGS, and TUV provide traceability, mechanical testing, and chemical composition verification for global supply chains.
Q8: How do manufacturing processes (hot-rolled vs cold-drawn) affect C34000 properties?
A8: Cold-drawn C34000 offers higher tensile strength and better surface finish, ideal for springs and precision rods. Hot-rolled forms are more ductile and easier to machine, suitable for large plates and structural components.
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