Bronze – Copper Casting Alloy (UNS C90300)
| Aspect | Description |
|---|---|
| Composition | Copper (Cu): 87.0 – 89.0% Tin (Sn): 10.0 – 11.5% Zinc (Zn): ≤ 1.0% Phosphorus (P): ≤ 0.25% Lead (Pb): ≤ 0.10% Nickel (Ni): ≤ 1.0% Iron (Fe): ≤ 0.35% Others: ≤ 0.5% |
| Properties | Excellent wear resistance Good machinability High tensile strength Corrosion resistance suitable for marine environments |
| Applications | Bearings, bushings, marine fittings, valve components, electrical contacts |
| Standards | ASTM B505, SAE J461, J462, EN 1982 |
| Forms | Rods, bars, tubes, sheets, custom shapes |
| Advantages | Suitable for high-wear applications Good corrosion resistance Excellent machinability Various forms available for different applications |
C90300 Tin Bronze
Chemical Composition
| Element | Composition (%) | Role |
|---|---|---|
| Copper (Cu) | 87.0 – 89.0 | Base metal, provides strength and conductivity |
| Tin (Sn) | 10.0 – 11.5 | Increases corrosion resistance and strength |
| Zinc (Zn) | ≤ 1.0 | Improves machinability and wear resistance |
| Phosphorus (P) | ≤ 0.25 | Enhances strength and wear resistance |
| Lead (Pb) | ≤ 0.10 | Improves machinability, reduces friction |
| Nickel (Ni) | ≤ 1.0 | Enhances strength and corrosion resistance |
| Iron (Fe) | ≤ 0.35 | Residual element, affects mechanical properties |
| Others | ≤ 0.5 | Includes trace elements, may refine grain structure |
Mechanical Properties
| Property | Value | Description |
|---|---|---|
| Tensile Strength | 420 MPa min | Maximum stress the material can withstand while being stretched or pulled |
| Yield Strength (0.5% ext.) | 180 MPa min | Stress at which the material begins to deform permanently |
| Elongation | 12% min | Measure of the material’s ability to stretch without breaking |
| Brinell Hardness | 100-120 HB | Resistance of the material to indentation or abrasion |
Performance at Different Temperatures
| Temperature (°C) | Yield Strength (MPa) | Elongation (%) | Description |
|---|---|---|---|
| Room Temperature | 180 | 12 | Typical conditions |
| 100°C | 160 | 10 | Elevated temperature conditions |
| 200°C | 140 | 8 | High temperature conditions |
Industrial Applications
- Bearings and Bushings: Excellent wear resistance and machinability.
- Marine Applications: Propellers, ship fittings due to corrosion resistance.
- Valve and Pump Components: Good for parts requiring durability and corrosion resistance.
- Electrical Contacts: Due to good electrical conductivity.
Shape and Size
- Shapes: Rods, bars, tubes, sheets, custom shapes.
- Sizes: Various dimensions available as per customer specifications.
Production Standards
| Standard | Description |
|---|---|
| ASTM B505 | Standard specification for tin bronze rod, bar, and shapes |
| SAE J461, J462 | Society of Automotive Engineers standards for copper and copper alloys |
| EN 1982: CC483K | European standard for copper alloys in rod, bar, and tube form |
Welding and Processing
| Process | Details |
|---|---|
| Welding | Gas metal arc welding (GMAW), TIG welding |
| Brazing | Silver brazing with appropriate flux |
| Machinability | Excellent, suitable for precision machining operations |
| Polishing | Achieves smooth finish with standard polishing methods |
| Heat Treatment | Annealing at specific temperatures to achieve desired properties |
| Cold Processing | Can be cold worked to achieve specific shapes and sizes |
Advantages and Disadvantages
| Advantages | Disadvantages |
|---|---|
| Excellent wear resistance and machinability | Higher cost compared to some other bronze alloys |
| Good corrosion resistance | Limited availability in some regions |
| Suitable for marine and industrial applications | |
| Good electrical conductivity |
Similar Products and Comparison
| Material | Composition | Similar Properties |
|---|---|---|
| C95400 Aluminum Bronze | Cu: 85.0-89.0%, Al: 9.0-11.0% | Similar corrosion resistance, higher strength |
| C93200 Bearing Bronze | Cu: 81.0-85.0%, Sn: 6.0-8.0% | Lower corrosion resistance, lower strength |
Summary
C90300 Tin Bronze is a copper-based alloy with high tin content, offering excellent wear resistance, good machinability, and corrosion resistance. It finds applications in bearings, bushings, marine fittings, valve components, and electrical contacts. Conforming to ASTM, SAE, and EN standards, it is available in various shapes and sizes. Despite higher cost and limited availability in some regions, its balanced mechanical properties make it suitable for demanding industrial environments.
This detailed overview provides comprehensive information about C90300 Tin Bronze, covering its composition, properties, applications, processing characteristics, standards, and comparison with similar materials. Adjust specific values based on manufacturer specifications and standards to accurately reflect current data.
