Copper Chromium

✔ Material: Copper-Chromium Alloy
✔ Purity: Cu ≥ 99%, Cr content customized (typically 0.5%–1.2%)
✔ Appearance: Reddish metallic solid
✔ Form: Rods, Bars, Ingots, Plates, Sheets, Powder – customizable

 

---

 

✅ Product Description
Copper Chromium, also known as CuCr alloy, is a high-performance precipitation-hardened alloy composed primarily of copper with a controlled amount of chromium. It combines excellent thermal and electrical conductivity with enhanced mechanical strength, hardness, and wear resistance.

Due to its ability to maintain structural integrity under high temperatures and electrical loads, Copper Chromium is widely used in applications such as electrical contacts, resistance welding electrodes, aerospace components, and molds for continuous casting. The chromium content strengthens the copper matrix while preserving its excellent conductivity, making CuCr an ideal solution where pure copper cannot perform.

This alloy can be supplied in various forms and conditions (annealed, hardened, machined) to meet specific industrial needs.

 

---

 

🔹 Features & Properties

✔ Excellent thermal and electrical conductivity

✔ Good wear and arc erosion resistance

✔ High strength-to-conductivity ratio

✔ Non-magnetic and corrosion-resistant

✔ Capable of heat treatment for added hardness

 

---

 

🚀 Applications & Related Industries

✅ Electrical Engineering: Switchgear, contacts, circuit breakers, and electrodes

✅ Welding Industry: Spot and seam welding electrodes, holders, shanks

✅ Automotive & Aerospace: High-performance components requiring conductivity and strength

✅ Mold Making: Continuous casting molds and cooling inserts

✅ Defense & Naval Applications: Structural or conductive parts under extreme conditions

 

---

 

📖 Synonyms

CuCr

Copper-Chromium Alloy

Chromium Copper

RWMA Class 2 Material

 

---

 

⚠ Health & Safety Information

⚠ Generally safe when used in solid form

⚠ Dust or fumes generated during grinding, welding, or melting can be hazardous-use local exhaust ventilation

⚠ Use protective gear and follow standard occupational hygiene practices

 

---

 

🏭 Production Method & Equipment
Produced via vacuum induction melting, continuous casting, or powder metallurgy depending on form. Chromium is alloyed into molten copper under inert atmosphere or vacuum to prevent oxidation. The alloy is then heat-treated (solutionizing + aging) to optimize strength and conductivity balance.

 

---

 

📐 Size & Customization
Available in custom forms and sizes, including:

Rods/Bars: Ø 4mm – 300mm

Plates/Sheets: Thickness 0.5mm – 100mm

Ingots: Custom dimensions

Powder: 10μm–150μm particle size (spherical or irregular)

Custom compositions: Cr content 0.4% to 2.0% based on application

 

---

 

📋 Certifications & Quality Assurance

Conforms to ASTM, GB, JIS, EN, and BS standards, and others if applicable

RWMA Class 2 specifications for welding electrodes

Supplied with COA, MSDS, and inspection reports

Quality management systems: ISO 9001, ISO 14001

 

---

 

⏱ Lead Time & MOQ

Lead Time: 7–15 working days for common sizes; custom forms may vary

MOQ: Standard stock – 5kg; Custom – subject to negotiation

 

---

 

💬 FAQs

Q1: What is the difference between CuCr and pure copper?
A1: CuCr offers significantly improved strength and hardness while retaining good conductivity, unlike pure copper which is softer.

Q2: What Cr content is best for resistance welding applications?
A2: Alloys with 0.6% to 1.2% Cr are widely used in RWMA Class 2 welding components.

Q3: Can Copper Chromium be heat treated?
A3: Yes. It can be solution annealed and age-hardened to increase mechanical properties.

 

---

 

🧭 How to Choose the Product

Use high-Cr content CuCr for electrodes and wear-resistant applications

Choose low-Cr or soft-annealed CuCr for applications needing easier machining or forming

Ensure form and heat treatment match your processing requirements (e.g., EDM, CNC machining, welding)

 

---

 

📏 Product Standards
✔ Conforms to ASTM, JIS, GB, EN, BS, and other international standards
✔ RWMA Class 2 compliant for resistance welding
✔ All dimensions and tolerances per customer drawings or specs

 

---

 

📊 Product Specifications

Property	Value/Range
Chemical Composition	Cu ≥ 98.5%, Cr: 0.5%–1.2%
Density	~8.9 g/cm³
Electrical Conductivity	≥75% IACS
Hardness (Aged)	100–160 HB
Tensile Strength	400–600 MPa
Working Temp Limit	Up to 400°C

 

---

 

🧪 Production & Quality Control

Spectroscopic analysis of alloy content

Ultrasonic flaw detection, conductivity testing, mechanical tests

100% inspection on dimensional tolerances and surface condition

 

---

 

📦 Shipping & Delivery Information

Packaging: Vacuum-sealed bags, PE wrap, wooden crates

Marking: Size, batch number, alloy designation

Delivery: Global shipping by air, sea, or express

 

---

 

🌱 Environmental Impact & Sustainability

100% recyclable and environmentally compliant

Production under waste management protocols and emission controls

Chromium sourcing follows RoHS and REACH standards

 

---

 

🧼 Maintenance & Care Instructions

Store in dry, non-corrosive environments

Clean surface dust using soft brush or cloth

Avoid prolonged contact with acids or corrosive chemicals

 

---

 

🧩 Differentiation Between Products

Copper Chromium balances conductivity and strength, unlike pure copper (high conductivity but soft) or CuBe (high strength but toxic)

Preferred over CuZr or CuNiSi when better thermal conductivity is required under mechanical load

 

---

 

📩 Contact Us
For pricing, technical consultation, or tailored Copper Chromium alloy solutions, contact our team. We offer full support on customization, application design, and compliance documentation.

 

---

 

Hot Tags: copper chromium, China, suppliers, buy, for sale, made in China