Phosphor Bronze Bush

Phosphor Bronze Bush made to order from china.

1. Material Type: This is clearly defined as Phosphor Bronze.

   • High Copper (Cu): Forms the base matrix of the alloy (around 90-93%).

   • Significant Tin (Sn): The primary alloying element (7-9%) that turns copper into bronze, providing strength, hardness, wear resistance, and corrosion resistance.

   • Controlled Phosphorus (P): This is the key element that makes it phosphor bronze (0.03-0.35%). Phosphorus acts as a deoxidizer during casting (improving fluidity and reducing casting defects) and significantly increases wear resistance, fatigue strength, and stiffness/hardness. The range allows for some variation depending on the exact grade and desired properties.

2. Controlled Impurities/Minor Elements:

   • Zinc (Zn): Kept very low (max 0.2%). High zinc content is typical in brasses or gunmetals, but kept low in high-quality phosphor bronzes to maximize mechanical properties.

   • Iron (Fe): Kept very low (max 0.1%). Iron is generally an undesirable impurity that can negatively affect properties.

   • Lead (Pb): Kept extremely low (max 0.050%). This indicates it's likely intended to be a lead-free or very low-lead phosphor bronze. This is important for environmental regulations (like RoHS) and certain applications where lead is prohibited. Lead is sometimes added intentionally to improve machinability (creating "leaded bronze"), but this specification restricts it.

   • Residuals: A small allowance (max 0.5%) for other unspecified trace elements.

3. Key Characteristics (Inferred from Composition): This specific alloy composition suggests a material with:

   • Good strength and hardness.

   • Excellent wear resistance (due to Sn and P).

   • Good fatigue resistance (due to P).

   • Good corrosion resistance.

   • Good bearing properties (making it suitable for bushes).

   • Relatively low lead content.

4. "Made to Order from China": This highlights the sourcing aspect. When ordering custom parts like this:

   • Clear Specification is Crucial: Ensure the Chinese manufacturer understands and adheres strictly to this chemical composition.

   • Standard Equivalence: It might be helpful to know which international standard (e.g., UNS, ISO, EN, JIS) this composition corresponds to, for easier communication and quality verification (e.g., it's similar to UNS C52100).

   • Quality Control: Implement measures to verify the composition and properties of the delivered bushes (e.g., material test certificates, independent testing).

   • Tolerances & Dimensions: Besides composition, you'll need to specify the exact dimensions, tolerances, surface finish, and any other mechanical property requirements for the bushes.

In Summary:

You are specifying a high-quality, low-lead Phosphor Bronze alloy suitable for manufacturing durable, wear-resistant bushes. The composition emphasizes strength, fatigue life, and bearing performance. When ordering from China, ensure clear communication of all requirements (including dimensions and tolerances) and have a plan for quality verification.

All values are % weight. Ranges represent what is permitted under applicable standards.