Bronze, a timeless alloy that has been cherished for centuries, finds its place in modern engineering as well. Among the many variations of bronze, ZCuSn10Pb1 stands out as a reliable and versatile option, often used to create essential components such as bushings, bearings, and gears.

ZCuSn10Pb1 Tin Bronze Bushing: An Overview

Composition and Standards

ZCuSn10Pb1, often referred to as GB ZCuSn10Pb1 according to GB/T 1176, is a cast copper alloy known for its remarkable properties. This alloy consists of copper (Cu), tin (Sn), and a small amount of lead (Pb), which together contribute to its exceptional performance characteristics.

Exceptional Hardness and Wear Resistance

One of the standout features of ZCuSn10Pb1 is its high hardness and outstanding wear resistance. These properties make it an ideal choice for components that endure heavy loads and high sliding speeds. Some of the common applications include connecting rods, bushings, bearings, gears, and worm gears.

Corrosion Resistance

In addition to its mechanical prowess, ZCuSn10Pb1 also possesses excellent corrosion resistance. It can withstand exposure to both air and water, making it suitable for applications in various environmental conditions.

Customization and Processing Services

Manufacturers and engineers appreciate the flexibility of ZCuSn10Pb1. It can be easily customized to meet specific requirements. If standard sizes do not suffice, you can avail of customized services to create tailor-made components based on your drawings and specifications.

graphite impregnated ZQSn10-1(ZCuSn10Pb1) Tin bronze Bushing

Graphite-impregnated ZQSn10-1 (also known as ZCuSn10Pb1) tin bronze bushings are advanced components designed to enhance performance in various industrial applications. These bushings combine the robust properties of tin bronze with the self-lubricating characteristics of graphite, making them ideal for high-load and high-speed environments.

The addition of graphite into the bushing matrix provides several benefits:

Self-Lubrication: Graphite acts as a solid lubricant, reducing friction and eliminating the need for additional oil or grease. This characteristic leads to lower maintenance requirements and extended equipment life.

Wear Resistance: The combination of tin bronze and graphite results in a material that withstands heavy loads and is resistant to wear, making it suitable for applications with intermittent movements.

Low Coefficient of Friction: The solid lubricant properties of graphite contribute to a low coefficient of friction, enhancing the efficiency of machinery.

Wide Operating Temperature Range: These bushings can operate effectively in temperatures ranging from -415°F to 1,100°F, making them versatile for various industrial settings.

GB ZCuSn10Pb1 GB/T 1176 Mechanical

Yield Rp0.2 (MPa)	Tensile Rm (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
792 (≥)	693 (≥)	14	42	21	Solution and Aging, Annealing, Ausaging, Q+T,etc	321

GB ZCuSn10Pb1 GB/T 1176 Physical

The following lists give GB ZCuSn10Pb1 GB/T 1176 properties such as physical properties, density, thermal expansion.

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
21	–	–			0.33	–
497	177	–	44.3	212		–
965	–	12	31.2			144	433

Dimensional Tolerance of precision castings ZCuSn10Pb1 Tin Bronze Bushing

Casting Dimensions(mm)

＞25~40

＞40~63

＞ 63~100

＞100~160

＞ 160~250

＞ 250~400

＞ 400~630

＞ 630~1000

＞ 1000~1600

＞16~2500

Sand Casting

Major unit

±0.9

±1.0

±1.1

±1.3

±1.4

±1.6

±1.8

±2.0

±2.3

±2.7

Minor unit

±1.8

±2.0

±2.2

±2.5

±2.8

±3.1

±3.5

±4.0

±4.5

±5.0

Investment Casting

CT7

±0.45

±0.50

±0.55

±0.6

±0.7

±0.8

±0.9

±1.0

±1.1

±1.3

The Advantages of Using ZCuSn10Pb1 Tin Bronze Bushings

Durability and Strength
Discover how the robust nature of ZCuSn10Pb1 Tin Bronze ensures longevity and reliability in demanding environments.

Self-Lubricating Properties
Learn how the self-lubricating characteristics of ZCuSn10Pb1 Tin Bronze can save you time and maintenance costs.

Corrosion Resistance
Find out why ZCuSn10Pb1 Tin Bronze is a top choice when it comes to corrosion-prone settings.

Applications of ZCuSn10Pb1 Tin Bronze Bushings

1. Automotive Industry: Bushings for vehicle suspensions, Bearings for internal combustion engines
2. Machinery and Equipment: Gears for industrial machinery, Worm gears for conveyor systems
3. Marine Industry: Components for shipbuilding, Bearings for marine equipment
4. General Engineering: Various structural components, Sliding elements for instruments and devices

Material Properties of ZCuSn10Pb1 Tin Bronze and Its Suitability for Punch Press Applications

• High Hardness and Wear Resistance

The addition of 10% tin (Sn) significantly enhances the hardness of the alloy (HB 90-120), forming a dense α solid solution matrix that effectively resists abrasive wear and adhesive wear caused by the continuous impact of punch presses.

In high-speed stamping (such as automotive sheet metal processing), the high-frequency sliding friction between the copper bushing and the punch/die can lead to surface fatigue and peeling. However, the wear resistance of ZCuSn10Pb1 can extend the lifespan of the copper bushing by 3-5 times.

• Impact and Fatigue Resistance

During punch press operations, copper bushings must withstand periodic impact loads (such as hundreds of stamping actions per minute). The high compressive strength (≥250 MPa) of ZCuSn10Pb1, along with the uniform distribution of lead (Pb), provides the material with excellent plasticity, allowing it to absorb impact energy, reduce crack initiation, and prevent brittle fracture.

• Self-Lubrication and Low Friction Coefficient

The 1% lead (Pb) in the alloy is uniformly distributed in its free state, forming a natural lubrication film that reduces the friction coefficient between the copper bushing and the shaft (the dynamic friction coefficient can be as low as 0.08-0.12).

This property is particularly important in high-speed punch presses, as it helps reduce “dry friction” that can lead to temperature rise and seizing risks, lowering reliance on lubricants, and adapting to oil-free or minimal oil environments.

• High-Temperature Resistance and Dimensional Stability

During stamping, local temperatures may rise to 150-200°C (such as in stainless steel continuous shearing). The thermal conductivity of ZCuSn10Pb1 (around 50 W/m·K) helps dissipate heat quickly, while maintaining stable mechanical properties at high temperatures, avoiding dimensional changes in fit gaps due to thermal expansion.

Core Application Advantages of ZCuSn10Pb1 Copper Bushings in Punch Presses

• Extended Equipment Maintenance Cycle

Traditional carbon steel or brass bushings are prone to wear under heavy-duty stamping, requiring frequent downtime for replacement (every 1-3 months). ZCuSn10Pb1 copper bushings’ wear resistance can extend the maintenance cycle to 6-12 months, significantly reducing downtime losses.

• Improved Stamping Precision and Surface Quality

High-rigidity copper bushings can suppress punch deflection, ensuring uniform stamping gaps (tolerance ≤ 0.02mm) and preventing defects such as burrs and warping.

Case Example: A certain automotive parts manufacturer saw the defect rate of stamped parts drop from 1.5% to 0.3% after using ZCuSn10Pb1 copper bushings.

• Adaptation to Complex Operating Conditions and Environmental Requirements

In dusty and humid environments (such as home appliance sheet metal workshops), the material’s corrosion resistance (annual corrosion rate < 0.01mm) prevents rust and seizing.

The self-lubricating properties reduce the use of lubricating oil, making it suitable for dust-free workshops or environmentally friendly manufacturing (such as ISO 14001 compliance).

• Comprehensive Economic Benefits

Although ZCuSn10Pb1 material costs more than ordinary bronze, its long lifespan and low maintenance needs reduce overall costs by approximately 30% over a 5-year lifecycle.

Typical Application Scenarios and Design Recommendations

High-Speed Precision Punch Press

• Applicable Components: Crankshaft support bushings, slide block guide bushings.

• Design Key Points: Use centrifugal casting to ensure the density of the material structure; surface can include oil grooves or graphite inserts to further optimize lubrication.

Heavy-Duty Multi-Station Stamping Line

• Applicable Components: Turret punch press rotating shaft sleeves, feeding mechanism guide sleeves.

• Operating Conditions: Multi-directional alternating loads and vibration environments.

• Solution: Design spiral oil grooves on the inner wall of the copper bushing and integrate a minimal lubrication system (MQL) for long-term stable operation.

High-Temperature Stamping (e.g., Silicon Steel Sheet Shearing)

• Thermal Management Strategy: Integrate cooling channels on the copper bushing’s outer wall, utilizing the material’s thermal conductivity to actively control the temperature.

ZCuSn10Pb1 vs. Other Materials Comparison

ZCuSn10Pb1 provides the best overall performance for high-speed, high-precision punch presses, while aluminum bronze is better suited for extreme heavy-duty but fully lubricated low-speed environments.

ZCuSn10Pb1 tin bronze bushings are a testament to the enduring appeal of bronze alloys in modern engineering. Their remarkable combination of hardness, wear resistance, and corrosion resistance makes them invaluable in a wide range of industries. Whether you need standard-sized components or custom solutions, ZCuSn10Pb1 has you covered. Its ability to withstand high loads and sliding speeds ensures the longevity and reliability of the parts it creates, making it a trusted choice for engineers and manufacturers alike. So, the next time you encounter a bronze bushing in your car’s suspension or a gear in a heavy-duty machine, you’ll know that ZCuSn10Pb1 tin bronze likely plays a crucial role in its performance and durability.