C61300 is an aluminum bronze material that complies with the American ASTM B111 standard.

ASTM B111 Copper Tube PDF

C61300 is an aluminum bronze alloy specified in the American ASTM standard and is a high-performance copper-based alloy. Primarily composed of copper, it is reinforced by the addition of aluminum, iron, and nickel. It offers excellent mechanical properties, corrosion resistance, and wear resistance, making it widely used in industrial applications requiring high strength and environmental adaptability.

The typical chemical composition of C61300 is as follows (by weight):
- Copper (Cu): 88.0%-91.0%, provides good conductivity and ductility as a matrix;
- Aluminum (Al): 6.0%-8.0%, forms an alumina protective layer, enhancing corrosion resistance and hardness;
- Iron (Fe): 2.0%-4.0%, refines grain size and increases tensile strength;
- Nickel (Ni): ≤1.0%, improves high-temperature stability and stress corrosion resistance;
- Other impurities: such as zinc and manganese, with the total amount kept within trace amounts.

1. Physical Properties:
- Density: Approximately 7.8 g/cm³, lower than pure copper but higher than ordinary brass;
- Melting Point Range: 1040°C–1080°C, suitable for high-temperature environments;
- Electrical and Thermal Conductivity: Approximately 20%–30% of pure copper, but still superior to most alloy steels.

2. Mechanical Properties:
- Tensile Strength: ≥550 MPa, reaching over 700 MPa after heat treatment;
- Hardness: HB 150–200, further increased through cold working or heat treatment;
- Elongation: ≥15%, combining high strength with good ductility;
- Wear Resistance: The hard phase formed by aluminum and iron significantly reduces frictional losses.

C61300 performs exceptionally well in a variety of harsh environments:
- Seawater Corrosion Resistance: The dense oxide film formed by aluminum resists chloride ion attack, making it suitable for marine engineering applications;
- Acidic Resistance: The material exhibits superior stability compared to ordinary bronze in weakly acidic and alkaline environments;
- Stress Corrosion Cracking Resistance: The addition of nickel effectively inhibits crack propagation.

1. Marine and Offshore Engineering: Propeller shafts, seawater pumps and valves, submarine pipeline connectors, etc.;
2. Chemical Equipment: Corrosion-Resistant Gears, Bearings, Seal Rings, and Reactor Components;
3. Machinery Manufacturing: High-Strength Wear-Resistant Bushings, Heavy-Duty Bearings, and Wear-Resistant Parts for Mining Machinery;
4. Energy: Turbine Blades for Thermal Power Plants and Fasteners for Nuclear Power Equipment.

- Hot Working: Recommended temperatures range from 750°C to 900°C to avoid low-temperature brittleness;
- Cold Working: Intermediate annealing is required to eliminate work hardening;
- Heat Treatment: Solution treatment (850°C quenching) optimizes overall performance.

C61300 aluminum bronze, with its balanced combination of high strength, wear resistance, and corrosion resistance, is an ideal material choice for heavy-duty, highly corrosive environments. Through appropriate composition design and process control, its potential for application in demanding conditions can be further expanded.

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As a professional enterprise dedicated to global copper product trade since 2008, GNEE Metal Group deeply recognizes the quality and responsibility embodied in the ASTM B111 standard. This standard not only specifies chemical composition and mechanical properties but also represents a comprehensive quality commitment spanning manufacturing processes to testing and verification. GNEE solemnly assures global customers that every ASTM B111-standard condenser tube and copper alloy tubing we supply will strictly adhere to its requirements for seamless manufacturing, annealing treatment, eddy current testing, and various mechanical performance tests. 

 

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