Copper and Its Alloys

Copper and its alloys are widely used in precision casting, boasting excellent electrical and thermal conductivity, corrosion resistance, and high strength. Their superior casting properties make them an ideal choice for many high-precision, high-performance components. Copper alloys play a vital role in many industrial sectors, particularly those requiring high electrical conductivity and wear resistance, such as the electronics, automotive, and energy industries.

In precision casting, copper and its alloys are commonly used to produce complex, high-precision, and high-temperature resistant components. The advantages of copper alloys lie in their excellent mechanical properties and corrosion resistance, which ensure long-term stability and reliability, making them particularly suitable for applications requiring high performance and a long life.

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Common Material Grades of Copper and Its Alloys

Alloy Grade	Alloy Name	Material Properties	Application Industry	Sample Widget
Cu-ETP (C11000)	Electrolytic Copper	Good electrical conductivity, thermal conductivity, high ductility, strong corrosion resistance	Electronics, precision instruments, air conditioners, heat exchangers	Electrical contacts, heat exchanger tubes, terminal blocks
Cu-Zn (Brass)	H59, H62, H63	Good mechanical properties, high strength and corrosion resistance, easy to process	Precision casting, automobiles, mechanical parts, ships	Gears, valves, pump bodies, mechanical connectors
Cu-Sn (Bronze)	H70, H80, H90	Excellent wear and corrosion resistance, good elasticity and strength	Shipbuilding, engineering machinery, military	Guide rails, springs, castings
Cu-Ni (Aluminum Bronze)	C61500, C63000	Excellent wear resistance and corrosion resistance, especially in seawater corrosion environment	Shipbuilding, marine engineering, and nuclear industry	Seawater pumps, ship propellers, corrosion-resistant components
Cu-Al (Aluminum Bronze)	CAl5, CAl10	High strength, good corrosion resistance, strong high temperature resistance	Aerospace, automotive, high temperature engineering	Turbine blades, valves, engine parts
Cu-Sn-Pb (Lead Bronze)	C93200, C93600	Good self-lubricating performance, wear resistance, suitable for high load work	Machinery, metallurgy, papermaking	Bearings, sliders, gears
Cu-Ag (Silver-Copper Alloy)	C17500	High electrical conductivity, excellent weldability and oxidation resistance	High-precision electronic equipment and communication equipment	High-frequency components, electrical contacts, and ultra-high-frequency components

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Copper and Its Alloy Casting Technology

Sand Casting

Applicable copper alloys: brass (Cu-Zn), bronze (Cu-Sn), aluminum bronze (Cu-Al)

Features:Moderate Cost: Sand casting is a relatively low-cost process suitable for medium-volume production.
High Adaptability: Suitable for casting complex geometries and larger components.
Wide Material Selection: Suitable for a variety of copper alloys, offering significant advantages in medium-volume production.

Suitable for: Medium-volume production and large-size castings, especially for cost-sensitive projects.
Suitable for medium-sized components in industries such as automotive and machinery.

Recommended components: Gears, pumps, valves, mechanical connectors, ship components, etc.

Investment Casting

Applicable copper alloys: electrolytic copper (Cu-ETP), bronze (Cu-Sn), aluminum bronze (Cu-Al), lead bronze (Cu-Sn-Pb)

Features: High Precision: Suitable for parts requiring complex shapes and high dimensional accuracy.
Excellent Surface Quality: Investment casting can achieve a high surface finish, reducing the need for subsequent machining.
Material Flexibility: A wide range of copper and its alloys can be cast, including high-strength and high-corrosion-resistant alloys.

Applications: Production of high-precision parts, such as aerospace, high-end automotive components, and precision instruments.
Suitable for casting small batches and complex shapes.

Recommended Components: High-precision electronic contacts, guide rails, springs, marine components, etc.

3D Printing

Applicable copper alloys: electrolytic copper (Cu-ETP), aluminum bronze (Cu-Al)

Features: Rapid Prototyping: 3D printing is suitable for prototypes and small-batch production, enabling rapid design, adjustment, and optimization.
Complex Geometries: 3D printing can cast complex designs that are difficult to achieve with traditional methods.
High Precision: 3D printing can achieve extremely high geometric accuracy, making it suitable for customization and small-batch production.

Applicable Scenarios: Small-batch custom production, especially for parts requiring complex shapes or high precision.
High-end manufacturing, scientific research prototype development, aerospace, and electronic equipment.

Recommended Parts: Electronic components, complex piping, precision instrument accessories, customized parts, etc.

Welding

Applicable copper alloys: Most copper alloys, such as electrolytic copper (Cu-ETP), bronze (Cu-Sn)

Features: Suitable for metal joining: Welding is suitable for processes requiring the joining of dissimilar parts or repairs, and is particularly well-suited for joining large parts.
Lower precision requirements: Welding is not typically used for complex single-part castings, but rather for the joining of multiple parts.

Applications: Suitable for mass welding and repair of parts, especially metal structures involving copper alloys.
Suitable for connecting structural components in machinery, construction, energy, and other fields.

Recommended components:Mechanical structural parts, equipment frames, heat exchanger components, etc.

Start Your Project with Leierwo

1. Submit Your Inquiry

Send your CAD drawings and 3D files via email, specifying material grade, order quantity, surface finish, or any other relevant details.

2. Cost Calculation

Once we receive your design, our engineering team will carefully evaluate the drawings and calculate the price based on actual production costs as soon as possible.

3. Start Production

Upon pricing approval, our production team will prepare the materials and schedule production promptly.Leierwo always ensures on-time delivery.

4. Arrange Delivery

After production is completed, we will provide packaging details and arrange shipment via sea or air. We support global shipping for every order.

FAQ

Q1. Are you a trading company or a manufacturer?

We are a factory with over 20 years of experience in casting and machining. We have rich expertise in this industry. If you come across suppliers claiming to produce castings in a wide range of materials (such as steel, iron, stainless steel, copper, etc.), they are likely trading companies. If you see workshops actively producing parts, you can be assured that we are a genuine manufacturer.

Q2. Can you quote based on 3D drawings?

Yes, as long as we receive CAD files or compatible 3D models that can be viewed with software like First Quote or Firstcut browser, we can provide a quotation. Please note that 2D drawings alone are insufficient for manufacturing precision components.

We support 3D CAD models from SolidWorks (.sldprt), ProE (.prt), and other CAD systems, commonly in IGES (.igs), STEP (.stp), ACIS (.sat), or Parasolid (.sat) formats.

Q3. How do you handle RFQs (Request for Quotation)?

We have an internal service system that responds to emails within 4 hours. If your request is urgent, please specify it in your email so we can prioritize your inquiry.

Q4. What is your typical lead time?

For rapid prototyping:
Silica sol casting: 20–30 days
Sand casting: 7–10 days
For mass production with machining included, the typical lead time is 45–60 days.
More complex parts may require a different delivery schedule.

Q5. Do you provide samples? Are they free?

Yes, we provide samples based on your drawings for you to confirm structure and quality. If the sample does not meet your requirements, we will replace it free of charge until it is qualified.

Q6. What payment methods do you accept?

We accept T/T (bank transfer), Alipay, credit card, etc. Typically, we require a 30% down payment upon order confirmation and the remaining 70% before shipment. For custom parts with complex requirements, additional pricing terms may apply.

Q7. How do you ensure quality control?

We have a comprehensive quality control system that covers every step, from raw material procurement to machining processes and final inspection. For critical components, we strictly follow drawing standards and customer specifications.

All customer data is kept confidential. Only trained engineers are authorized to handle production orders. Third-party inspection or factory audits are welcome, or you may use our in-house quality team for final inspection.

Q8. Do your products come with a warranty?

Yes, we guarantee that all materials used are 100% genuine and as specified.

Q9. How do you view your relationship with customers?

We value long-term cooperation and support our customers’ production needs.

We believe every honest customer is a friend, and we treat our partnerships sincerely—building friendships and strong teams regardless of where our customers come from.