In the world of engineering and machinery, selecting the right materials for components is crucial to ensure the longevity and efficiency of your equipment. One such material that has gained prominence in this regard is ZCuSn5Pb5Zn5, also known as ASTM83600 or tin bronze. This cast copper alloy boasts exceptional wear and corrosion resistance, ease of processing, excellent casting performance, and air tightness.

The CuSn5Zn5Pb5-C bronze bushing material is primarily composed of key elements such as copper (Cu), tin (Sn), zinc (Zn), and lead (Pb), blended in specific proportions, with small amounts of carbon (C) possibly included. The precise alloy composition ensures exceptional and consistent performance. CuSn5Zn5Pb5-C bronze complies with various international standards, such as CC491K under the European EN 1982 standard, LG2 under the British BS 1400 standard, and C83600 under the American ASTM B 505 standard.

Casting ZCuSn5Pb5Zn5 Sleeve Bushing’ (ASTM83600) Chemical Composition:

The composition of ZCuSn5Pb5Zn5 is finely tuned to provide the desired mechanical properties. It typically consists of:

Copper (Cu): Rest
Tin (Sn): 4.0 ~ 6.0%
Zinc (Zn): 4.0 ~ 6.0%
Lead (Pb): 4.0 ~ 6.0%
Phosphorus (P): ≤ 0.05% (impurity)
Nickel (Ni): ≤ 2.5% (excluding total impurities)
Aluminum (Al): ≤ 0.01% (impurities)
Iron (Fe): ≤ 0.3% (impurities)
Silicon (Si): ≤ 0.01% (impurities)
Antimony (Sb): ≤ 0.25% (impurity)
Sulfur (S): ≤ 0.10% (impurities)
It’s essential to note that the total impurities should not exceed 1.0%.

ZCuSn5Zn5Pb5 Self lubricating brass Sleeve dimensions with Graphite hole

The ZCuSn5Zn5Pb5 self-lubricating brass sleeve, commonly known as a graphite-plugged bearing, is engineered for industrial applications that demand low maintenance and high durability. Below are its key specifications and dimensions:

Material Composition:

• Base Alloy: ZCuSn5Zn5Pb5 (also referred to as CuZn25Al5Mn4Fe3 in some cases)
• Graphite Content: Contains embedded solid lubricants, typically covering 20-30% of the friction surface area.

Performance Characteristics:

• Density: Approximately 8 g/cm³
• Hardness: HB > 210
• Tensile Strength: > 750 N/mm²
• Yield Strength: > 340 N/mm²
• Elongation: > 12%
• Coefficient of Linear Expansion: 2.2 × 10⁻⁵ /°C
• Temperature Range: -40°C to +200°C
• Maximum Dynamic Load: 98 N/mm²
• Maximum Speed:
  • Dry Lubrication: 0.3 m/s
  • Oil Lubrication: 1.0 m/s
• Friction Coefficient:
  • Dry Lubrication: 0.12 to 0.16
  • Oil Lubrication: 0.03 to 0.08

Typical Dimensions: The sleeve’s dimensions can vary based on specific application requirements, but common sizes include:

• Inner Diameter (ID): Typically ranges from 5 mm to larger sizes as needed.
• Outer Diameter (OD): Usually a few millimeters larger than the ID.
• Length (OAL): Commonly around 25 mm but customizable.

For example, a typical sleeve might have dimensions such as:

• ID: 30 mm
• OD: 40 mm
• Length: 25 mm

These sleeves are particularly well-suited for demanding environments such as mining machinery, shipbuilding, and heavy industrial equipment, where traditional lubrication methods may be ineffective or impractical.

Mechanical Properties:

The mechanical properties of ZCuSn5Pb5Zn5 make it an ideal choice for applications involving high loads and moderate sliding speeds. These properties include:

Tensile Strength (b) ≥ 200 MPa at room temperature
Flexural Strength ≥ 90 MPa at room temperature
Elongation (5%) ≥ 13%
Hardness ≥ 59 HB
Heat Treatment Specifications:
For optimal performance, ZCuSn5Pb5Zn5 should undergo heat treatment with specific temperature ranges. The recommended heat treatment process involves heating to a temperature between 1188°C to 1220°C and pouring at 1150°C to 1200°C.

GB-ZCuSn5Pb5Zn5