Copper is one of the oldest and most essential industrial metals, valued worldwide for its unmatched electrical conductivity, thermal conductivity, malleability, corrosion resistance, and recyclability. It serves as a foundational material for electronics, automotive parts, construction components, plumbing systems, hardware, and sheet metal fabrication. For engineers, procurement teams, designers, and manufacturers, a critical question often arises: What are the 5 types of copper?
Understanding the five primary categories of copper and copper alloys helps you select the right material for performance, durability, cost, and manufacturing compatibility. In this complete guide, we break down each type's composition, properties, ideal applications, and real-world uses. We also introduce custom copper alloy solutions from Joyear Metalwork, a trusted ISO-certified manufacturer with 15+ years of expertise in sheet metal fabrication, precision stamping, and ODM/OEM metal components for global industrial clients.
The 5 Main Types of Copper (Pure & Alloy)
Copper is broadly divided into pure copper (unalloyed) and copper alloys (copper mixed with other metals to enhance strength, machinability, or corrosion resistance).
The five most widely used types in manufacturing and industry are:
- Electrolytic Tough Pitch (ETP) Copper
- Oxygen-Free High-Conductivity (OFHC) Copper
- Phosphorus Deoxidized Copper (DHP)
- Brass
- Bronze
We explain each category in full detail below.
1. Electrolytic Tough Pitch (ETP) Copper
The most widely used pure copper
ETP copper is the standard industrial-grade pure copper, produced via electrolysis to reach a purity of 99.90% Cu. It contains a small controlled amount of oxygen (100–450ppm), which improves strength while preserving conductivity.
Key Properties
- Excellent electrical conductivity: ~100% IACS (International Annealed Copper Standard)
- Outstanding thermal conductivity
- Good formability, ductility, and weldability
- Natural corrosion resistance in atmospheric and freshwater environments
Typical Applications
- Electrical wiring, busbars, cables, and connectors
- Transformers, motors, and generators
- Heat sinks and thermal management components
- General sheet metal stamping and formed parts
ETP copper is the default choice for most electrical and general industrial applications due to its balance of performance and affordability.
2. Oxygen-Free High-Conductivity (OFHC) Copper
Ultra-pure copper for high-performance applications
OFHC copper is refined to 99.99% copper purity with near-zero oxygen content (<10ppm), eliminating the risk of hydrogen embrittlement in high-temperature welding or brazing processes.
Key Properties
- Highest electrical conductivity among all coppers: ~101–105% IACS
- Extreme purity for stability in vacuum and high-heat environments
- Superior ductility and cold-forming performance
- No embrittlement during welding or annealing
Typical Applications
- High-frequency electronic components and radar systems
- Semiconductor lead frames and vacuum devices
- Aerospace and medical equipment
- High-performance electrical contacts and precision conductors
OFHC copper is used only in mission-critical applications where maximum conductivity and purity are non-negotiable.
3. Phosphorus Deoxidized Copper (DHP)
Weldable, corrosion-resistant copper
DHP copper is deoxidized with phosphorus during production, reducing oxygen to <250ppm and adding excellent welding and brazing performance. The small phosphorus residual enhances corrosion resistance without severely reducing conductivity.
Key Properties
- Excellent weldability and brazability (no hydrogen embrittlement)
- Good conductivity (~85–95% IACS)
- High corrosion resistance, especially in plumbing and heating systems
- Strong formability for deep drawing and tube production
Typical Applications
- Plumbing tubes, HVAC heat exchangers, and condenser pipes
- Welded electrical components and terminals
- Automotive radiators and fluid systems
- Architectural metalwork and outdoor components
DHP copper is the top choice for applications requiring strong weldability and long-term corrosion resistance.
4. Brass
The most popular copper–zinc alloy
Brass is an alloy of copper and zinc, often with small additions of lead, tin, aluminum, or silicon to improve machinability, strength, or corrosion resistance. Zinc content typically ranges from 10% to 45%, directly affecting color, hardness, and ductility.
Key Properties
- Bright golden appearance, ideal for decorative and hardware uses
- Excellent machinability (especially leaded brass)
- Higher strength and hardness than pure copper
- Good corrosion resistance; marine-grade brass resists saltwater damage
- Low cost compared to pure copper
Typical Applications
- Furniture hardware, hinges, handles, and decorative trims
- PCB welding terminals, electrical connectors, and precision stamping parts
- Valves, fittings, and plumbing components
- Musical instruments, locks, and fasteners
- Automotive and appliance parts
Brass is the most versatile copper alloy, widely used in both functional and decorative industrial products.
5. Bronze
High-strength copper–tin (or aluminum) alloy
Traditional bronze is a copper–tin alloy, though modern versions may include aluminum, silicon, or nickel for enhanced performance. It is one of the oldest engineered alloys, valued for durability and wear resistance.
Key Properties
- High hardness, tensile strength, and wear resistance
- Superior corrosion resistance, especially in marine and outdoor environments
- Low friction coefficient, ideal for bearings and bushings
- Attractive warm golden-brown finish
Typical Applications
- Bearings, gears, and bushings for heavy machinery
- Marine hardware, ship fittings, and coastal construction parts
- Industrial valves, pumps, and hydraulic components
- Architectural metal accents and heavy-duty hardware
- Electrical contacts and high-stress mechanical parts
Bronze remains the top choice for heavy-duty, high-wear industrial applications requiring long service life.
Quick Comparison Table: 5 Types of Copper
| Type | Classification | Purity/Alloy | Top Strengths | Best For |
|---|---|---|---|---|
| ETP Copper | Pure Copper | 99.90% Cu | High conductivity, low cost | General electrical parts, wiring |
| OFHC Copper | Pure Copper | 99.99% Cu | Ultra-high conductivity, purity | High-performance electronics |
| DHP Copper | Pure Copper | Cu + P deoxidized | Weldability, corrosion resistance | Plumbing, welded components |
| Brass | Copper Alloy | Cu + Zn | Machinability, cost, aesthetics | Hardware, connectors, stamping |
| Bronze | Copper Alloy | Cu + Sn/Al | Strength, wear resistance | Heavy machinery, marine parts |
This comparison makes it easy to match copper type to project requirements.
Custom Copper Alloy Solutions by Joyear Metalwork
For high-quality copper and copper alloy components manufactured to strict industrial standards, turn to Joyear Metalwork, a leading family-owned manufacturer founded in 2008. We specialize in custom sheet metal fabrication, precision stamping, and full ODM & OEM services for copper-based parts used worldwide.
About Joyear Metalwork
We hold ISO 9001:2015 and ISO 14001:2004 certifications, ensuring every product meets global quality and environmental requirements.
Our manufacturing capabilities include:
- 5,000+ square meters of modern production space
- 300+ skilled and experienced employees
- 100+ stable global cooperating partners
- 15+ years of specialized metal fabrication expertise
- Products meeting or exceeding ISO 2330 and ANSI/ITSDF B56.11.4 industrial standards
Our Copper & Copper Alloy Product Range
We produce precision components using all five types of copper, tailored to your application:
- Copper Alloy Precision Stamping Parts: High-conductivity brass and bronze components for electronics and appliances.
- PCB Welding Terminals & Electrical Connectors: Reliable, corrosion-resistant copper parts for consistent performance.
- Long Metal Hinges & 72-Inch Stainless Steel Piano Hinges: Durable brass/bronze finishes for furniture and architectural use.
- Prototype Sheet Metal Stamping: Rapid custom development with copper and copper alloys.
- Full ODM/OEM support for copper-based parts in automotive, construction, electronics, and hardware industries.
Why Choose Joyear for Copper Components?
- Material Expertise: We select the optimal copper type for your performance, environment, and budget.
- Precision Manufacturing: Advanced stamping and fabrication ensure tight tolerances and consistent quality.
- Customization: Full design support from prototyping to mass production.
- Fast Delivery: Large production capacity and stocked materials ensure timely order fulfillment.
- Quality Assurance: Dedicated quality management team inspects every batch for defect-free performance.
- Competitive Pricing: Efficient production lowers costs without compromising quality.
Joyear Metalwork is the trusted partner for OEMs, attachment manufacturers, and global dealers seeking reliable, high-performance copper and copper alloy components.
How to Choose the Right Type of Copper
Use this simple guide to select the best copper for your project:
- Choose ETP Copper for general electrical and thermal applications with balanced cost and performance.
- Choose OFHC Copper for ultra-high conductivity and purity in high-tech electronics.
- Choose DHP Copper for welded parts, plumbing, and corrosion-resistant tubing.
- Choose Brass for machined parts, electrical terminals, hardware, and decorative components.
- Choose Bronze for heavy-duty, high-wear, marine, or industrial structural parts.
When in doubt, consult an experienced metal fabrication partner like Joyear Metalwork to recommend the ideal material.
Conclusion
To answer the question "What are the 5 types of copper?"-the five essential categories are ETP copper, OFHC copper, DHP copper, brass, and bronze. These include three high-purity pure coppers and two foundational copper alloys, each engineered for specific performance strengths across countless industrial applications.
Copper's unmatched versatility makes it irreplaceable in modern manufacturing. Whether you need high conductivity for electronics, weldability for plumbing, machinability for hardware, or strength for heavy machinery, one of these five copper types will meet your needs.
For custom copper and copper alloy components built with precision, durability, and professional manufacturing, partner with Joyear Metalwork. We deliver tailored solutions that optimize material performance and project value.
Explore our full range of sheet metal fabrication, precision stamping, and custom copper solutions today at https://www.joyearmetalwork.com/.
