C90300 High Tin Bronze Product Introduction:
• Composition: 86-89% copper, 7.5-9% tin, other elements
• Key features:
- High strength and excellent wear resistance
- Buona resistenza alla corrosione
- Suitable for heavy load and low-speed applications
• Main applications: - Bearings and gears
- Marine propeller hubs
- Valve components
• Processing characteristics: - Eccellenti proprietà di fusione
- Buona lavorabilità
• Complies with international standards like ASTM B505, B271
• Wide temperature range applicability, from low to moderate temperatures
• Available in various forms: bars, plates, tubes, castings
C90300 Tin Bronze Product Introduction
C90300 is a high-tin bronze alloy known for its excellent wear resistance, high strength, and good corrosion resistance. This versatile material is widely used in various industrial applications, particularly where high load-bearing capacity and low-speed operations are required.
Composizione chimica
The chemical composition of C90300 is crucial to its performance characteristics:
| Elemento | Percentage Range | Funzione |
|---|---|---|
| Rame | 86.0 – 89.0% | Base metal, provides ductility and conductivity |
| Stagno (Sn) | 7.5 – 9.0% | Increases strength and wear resistance |
| Piombo (Pb) | 0.30 – 1.5% | Improves machinability |
| Zinco (Zn) | 1.0 – 3.0% | Enhances fluidity in casting, deoxidizer |
| Nichel (Ni) | 1.0% max | Improves corrosion resistance |
| Ferro (Fe) | 0.20% max | Grain refiner, increases strength |
| Fosforo (P) | 0.05 – 0.35% | Deoxidizer, improves fluidity |
| Antimony (Sb) | 0.20% max | Enhances strength and hardness |
| Zolfo (S) | 0.05% max | Impurity, controlled to minimize negative effects |
| Alluminio (Al) | 0.005% max | Deoxidizer |
| Silicon (Si) | 0.005% max | Improves wear resistance |
Proprietà meccaniche
The mechanical properties of C90300 contribute to its suitability for various industrial applications:
| Proprietà | Valore |
|---|---|
| Resistenza alla trazione (min) | 40 ksi (276 MPa) |
| Limite di snervamento (min) | 20 ksi (138 MPa) |
| Allungamento (min) | 20% |
| Durezza Brinell | 70 HB (typical) |
| Densità | 0.319 lb/in³ (8.83 g/cm³) |
| Modulo di elasticità | 15.5 x 10^6 psi (107 GPa) |
Prestazioni a diverse temperature
C90300 maintains its properties across a range of temperatures:
| Intervallo di temperatura | Caratteristiche di performance |
|---|---|
| Low Temperature (-50°C to 0°C) | Maintains ductility and strength |
| Room Temperature (0°C to 30°C) | Optimal performance for most applications |
| Elevated Temperature (30°C to 200°C) | Gradual decrease in strength, still suitable for many applications |
| High Temperature (200°C to 300°C) | Significant decrease in strength, limited applications |
Applicazioni industriali
C90300 finds use in various industries due to its unique properties:
| Industria | Applicazioni |
|---|---|
| Marino | Propeller hubs, bushings, valve components |
| Rendimento della resistenza alla trazione | Thrust washers, bushings, wear plates |
| Macchinari industriali | Gears, bearings, wear strips |
| Olio e gas | Pump components, valve seats |
| Costruzione | Bridge bearings, heavy equipment components |
| Aerospaziale | Componenti del carrello di atterraggio, boccole |
Disponibilità di forme e dimensioni
C90300 is available in various forms to suit different manufacturing needs:
| Modulo | Gamma di dimensioni | è un acciaio strutturale ad alta resistenza a bassa lega standard cinese GB |
|---|---|---|
| Round Bars | 10mm – 300mm diameter | Standard lengths up to 3.6m |
| Hollow Bars | 20mm – 250mm OD, 10mm – 200mm ID | Custom lengths available |
| Piatti | 5mm – 100mm thickness | Width up to 1.2m, length up to 3m |
| Tubi | 15mm – 200mm OD, 1.5mm – 25mm wall thickness | Standard lengths up to 3m |
| Castings | Dimensioni personalizzate | Sand, centrifugal, and continuous casting available |
| forgiati | Up to 1000kg | Custom shapes possible |
Standard di produzione
C90300 complies with several important standards:
| Standard | Descrizione |
|---|---|
| ASTM B505 | Standard Specification for Copper Alloy Continuous Castings |
| ASTM B271 | Standard Specification for Copper-Base Alloy Centrifugal Castings |
| ASTM B584 | Standard Specification for Copper Alloy Sand Castings for General Applications |
| SAE J461 | Copper-Base Alloy Castings |
| MIL-C-22229 | Military Specification: Castings, Bronze |
International Standards and Corresponding Grades
C90300 has equivalent or similar grades in different countries:
| Paese/regione | Standard | Equivalent/Similar Grade |
|---|---|---|
| Stati Uniti d'America | ASTM/UNS | C90300 |
| Europa | SU | CuSn8 |
| Giappone | JIS | CAC903 |
| Cina | GB | ZCuSn8Pb1 |
| UK | BS | PB3 |
| Germania | A PARTIRE DAL | G-CuSn8 |
Caratteristiche di saldatura
Welding C90300 requires specific techniques:
| Metodo di saldatura | adeguatezza | è un acciaio strutturale ad alta resistenza a bassa lega standard cinese GB |
|---|---|---|
| Gas Tungsten Arc Welding (GTAW) | Eccellente | Preferred for thin sections and precision work |
| Gas Metal Arc Welding (GMAW) | Bene | Suitable for thicker sections |
| Shielded Metal Arc Welding (SMAW) | Equo | Requires proper electrode selection |
| Saldatura ossiacetilenica | Povero | Not recommended due to high heat input |
| Saldatura a resistenza | Equo | Limited applications |
Processing Characteristics
C90300 can be processed using various methods:
| Processi | adeguatezza | è un acciaio strutturale ad alta resistenza a bassa lega standard cinese GB |
|---|---|---|
| lavorazione | Eccellente | Good machinability, produces smooth finishes |
| formando | Equo | Limited cold formability due to high tin content |
| Colata | Eccellente | Widely used in casting applications |
| forgiatura | Equo | Hot forging possible, limited cold forging |
| Trattamento termico | Bene | Can be strengthened through heat treatment |
Lucidatura
Polishing C90300 can enhance its appearance and surface properties:
| Polishing Method | Effectiveness | è un acciaio strutturale ad alta resistenza a bassa lega standard cinese GB |
|---|---|---|
| Mechanical Polishing | Eccellente | Achieves high luster |
| Chemical Polishing | Bene | Suitable for complex shapes |
| Electro-polishing | Molto bene | Provides smooth, bright finish |
| Buffing | Eccellente | For final finish and high shine |
Trattamento termico
Heat treatment can modify the properties of C90300:
| Trattamento termico | Scopo | Processi |
|---|---|---|
| Ricottura | Stress relief, softening | Heat to 550-650°C, slow cool |
| Trattamento della soluzione | Omogeneizzazione | Heat to 760-780°C, water quench |
| Indurimento dell'età | Increase strength and hardness | Heat to 350-400°C for 2-4 hours, air cool |
Lavorazione a freddo
Cold working can alter the mechanical properties of C90300:
| Cold Working Method | Effect on Properties |
|---|---|
| Cold Rolling | Increases strength, reduces ductility |
| Trafilatura a freddo | Improves surface finish, dimensional accuracy |
| Forgiatura a freddo | Limited applicability, may require intermediate annealing |
| Shot Peening | Improves fatigue resistance |
Vantaggi e svantaggi
C90300 tin bronze has several pros and cons:
| Vantaggi | Svantaggi |
|---|---|
| Molta forza | Higher cost compared to lower tin bronzes |
| Eccellente resistenza all'usura | Limited formability |
| Buona resistenza alla corrosione | Lower electrical conductivity than pure copper |
| Low friction coefficient | Potential for dezincification in certain environments |
| Buona lavorabilità | Not suitable for high-speed applications |
| Suitable for heavy loads | May require special welding procedures |
Prodotti simili e confronto
C90300 is part of a family of tin bronzes. Here’s a comparison with similar alloys:
| Lega | Cu% | Sn % | Altri elementi | Differenze chiave |
|---|---|---|---|---|
| C90300 | 86-89 | 7.5-9 | Zn, Pb, Ni | Base alloy for comparison |
| C90500 | 86-89 | 9-11 | Ni, Zn | Higher tin, increased hardness |
| C90700 | 88-90 | 10-12 | Ni | Even higher tin, maximum hardness |
| C83600 | 84-86 | 4-6 | Zn, Pb | Lower tin, increased ductility |
| C92200 | 86-90 | 5.5-6.5 | Zn, Pb | Lower tin, better for pressure-tight applications |
Conclusione
C90300 tin bronze is a versatile alloy offering a balanced combination of strength, wear resistance, and corrosion resistance. It excels in applications involving heavy loads and low speeds, such as bearings, gears, and marine components. While it has limitations like higher cost and limited formability, its good machinability and casting properties enhance its manufacturing versatility. When selecting C90300, engineers should consider specific application requirements, operating conditions, and economic factors. Its compliance with international standards and proven performance in various industries make it a reliable choice for many demanding applications in modern engineering and manufacturing.
