UNS C35300 Copper Alloy Chemical Composition, Grade, Table and PDF Online

UNSC 35300 is a carchelled leaded brass alloy that has the industry’s best performance in terms of machinability and corrosion resistance. The most common of these alloys is cupro nickel which lies under the category of copper alloys and provide the mixture of properties possessed by the solder and wood. In most cases, the main component is cuprous-mercury (Cu), and other chemical elements such as zinc (Zn) and lead (Pb) are found present in varying proportions among the other trace elements. Among the grade specifications are evenness and superiority of producing processes. Tables showing the composition breakdown as well as the mechanical properties are useful for the engineers and the manufacturers of the products who need to consider the materials to choose for a particular purpose. Online resources, including PDF files, give a full-on details about C35300 UN Steel and this information will empower the industries that use this raw material like automotive, electrical, and plumbing industries.

UNS C35300 Copper Alloy Chemical Composition And Grade Table

UNS C35300 is a leaded brass alloy that is chiefly composed of copper (Cu), lead (Pb), and zinc (Zn). It normally consists of a copper portion of about 61% and a zinc portion of about 36% and a lead portion of about 3% . This alloy is rather machinable owing its high lead concentration that is good for industries like plumbing, electrical, automotive and others to make accurate and delicate parts. It is characterized by good corrosion resistance and a relatively high thermal conductivity. However, care must be taken in its use because of the presence of lead in case of its use in processes that involve the production of water which is used for the consumption of water. C35300 UNS was tested according to ASTM B584 standard.

UNS C35300 Copper Alloy Composition Table
Elements Cu Pb Zn Fe
Min (%) 60.0 1.5 - -
Max (%) 63.0 2.5 Rem 0.15

The Advantages and Disadvantages of UNS C35300 Copper Material Properties, C35300 Properties


  • High Strength: UNS C35300 copper alloy possesses outstanding strength traits, thereby being applied in areas that require tough mechanical characteristics.

  • Good Corrosion Resistance: This alloy has a good corrosion resistance, especially in marine and industrial environments, which makes it durable and long-lasting in different applications.

  • Machinability: Copper alloy UNS C35300 has got the property of easy machinability, giving an opportunity to machine it in complex forms and parts.

  • Wear Resistance: It has a good property of wear resistance making it suitable for applications such as wear and friction parts like pumps and gears.

  • Thermal Conductivity: Like all copper alloys, UNS C35300 has a high thermal conductivity which makes it suitable for heat transfer applications where the thermal conductivity is required to be efficient.


  • Cost: Unlike other copper alloys, UNS C35300 entails a higher start-up cost. This may be a barrier for some applications, especially in cost-conscious industries.

  • Limited Weldability: However, such alloy is weldable using particular techniques and must be assessed for weldability compared to other copper alloys during fabrication.

  • Potential for Stress Corrosion Cracking: In some circumstances and conditions, UNS C35300 copper alloy can be prone to stress corrosion cracking, especially in environments rich in chlorides or acids.

  • Low Electrical Conductivity: Unlike pure copper, the UNS C35300 has less electrical conductivity which means it may not suitable for electrical applications which require high conductivity.

  • Sensitivity to Some Environments: Under specific applications and depending on the environmental conditions, sensitivity of UNS C35300 copper alloy to certain chemicals and environments may be developed, which will cause the need for the right choice of material and protective measures.

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Frequently Asked Questions

What is the chemical composition of UNS C35300 Copper Alloy?

The chemical composition is usually made up of around 63% copper, 3. 5-4. 5% lead, 0. 8-1. 5% iron, 0. 2% max. zinc, 0. 25% max. sulfur, among others, and also trace elements, such as manganese.

What are the mechanical properties of UNS C35300 Copper Alloy?

UNS C35300 shows good tensile strength, yield strength, and elongation properties. On the other hand, the mechanical behavior differs depending on the manufacturing method and the heat treatment.

What are the applications of UNS C35300 Copper Alloy, then?

Because of its good machinability, UNS C35300 is often used in different applications where complex parts or components have to be made. Usage of this material is wide spread and it covers fittings, wheels and valve stems, gears and screw machine products.

Where can I get additional details on ZNNS C35300 Copper Alloy?

Furthermore, the chemical compositions, mechanical properties, fabrication guidelines, and standards compliance for the mentioned materials can be obtained from the industry databases, material data sheets, or online resources provided by manufacturers and industry organizations.