Kefeng Tungsten Copper Tungsten Alloys Resistance Welding Electrodes, Heavy Duty Contacts, Relays, Switches, RWMA quality standard
Material: 65%W35%Cu, 70%W30%Cu, 75%W25%Cu , 80%W20%Cu copper tungsten
Specification: standard or custom sizes according to customer's drawing
Kefeng copper-tungsten alloys are of the highest quality avaiable and the physical properties of our alloys are considerably those specified under RWMA standards.
We produce various sizes, shapes and finished parts in forms as wire, rod, bar, sheet, ,strip, foil, sheet, plate, tubing, blanks, semi-finished and custom finished parts or according with customer's drawing paper.
Certification: Corporation is ISO9001 Certified, SGS approved and has been manufacturing the highest quality tungsten alloy metals for over 25 years.
Product Description
Refractory bi-metal composite produced by a tightly controlled process of pressing and sintering tungsten powder and then infiltrating the sintered material with copper. Kefeng's Copper Tungsten Alloys, in which the tungsten provides the structural strength and heat resistance while the copper is the electrical and heat conductor. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. They also possess good thermal and electrical conductivity. We, Kefeng Powder Metallurgy Co., manufactures and supplies DRC Conflict Free material only.
Characteristics and features
The Copper tungsten material products are highly resistant to heat, electric arc, wear and deformation at high temperature welding, flash butt and spot welding. They also have excellent electrical and thermal conductivity. These metal composite materials produce dense hard metals with low thermal expansion, good thermal and electrical conductivity, excellent arc resistance, superior wear resistance and strength at elevated temperatures.
- Low thermal expansion
- High wear resistance
- Low consumption
- High arc resistance
- High thermal and electrical conductivity
Application
For Copper Tungsten Alloy of composition of 75%W25%Cu that can be applied in projection welding electrodes, flash and butt welding electrodes, light upsetting and seam welding bushings. It is harder than Class 10 and used where moderate pressure is required. This material can also be used for spot welding low conductivity steels, such as stainless, and the availability are Rod, Bar and Inserts.
For Copper Tungsten Alloy of composition of 80%W20%Cu, they can be used in Heavy duty projection welding electrodes, electro-forming and electroforging electrode facings for upsetting of studs and rivets, cross wire welding of large diameter wire and rod. Kefeng's Copper Tungsten alloys are used as electrode materials for resistance welding and similar related applications and the heavy duty contact, relays, switches, which the materials will withstand the effects of the arcing to the interruption of large currents.
At Kefeng, we can reproduce the fine features your designs demand with tolerances in the micron range. We fabricate precision tungsten/CPM parts for medical devices, wire bond cutters and other applications. Some of the advantages of working with Kefeng for your tungsten machining service needs include:
- Precision tolerances
- Proven expertise
- Fast turnarounds
- Cost-effective services
The typical applications include:
- Resistance welding electrodes
- Circuit breakers (air or oil immersed)
- Arcing tips
- Heavy-duty contactors
- EDM electrodes
- Make-and-break contacts
- Relays/switches
Technical parameters
| Materials |
Wt% Tungsten Content |
Wt%
Copper Content |
Grade |
RWMA Class |
Density (g/cc) |
Electrical Conductivity (%IACS) |
Hardness (HRB) |
| W70Cu30 |
70 |
Balance |
A5WC |
10 |
14.18 |
47-52 |
88-95 |
| W75Cu25 |
75 |
Balance |
A10WC |
11 |
14.80 |
42-50 |
96-99 |
| W80Cu20 |
80 |
Balance |
A30WC |
12 |
15.60 |
41-49 |
99-104 |
Note: The values are typical and not to be used for specifications.
For three decades Kefeng Powder Metallurgy has pioneered and produced the best tungsten alloy metal solutions for the world's products, applications and industries.
-Our products are subjected to rigorous physical testing, including density, tensile, yield strength,conductivity, elongation and hardness.
-Our products are identified at all stages of the production process and are thoroughly analized and checked before delivery.
-Our products can be supplied with full verification in accordance with specifications,whatever
Chemically, mechanically or physically.
At Kefeng Metallurgy,our expert and equipment are committed to providing the best tungsten alloy
Refractory metal solution that performs our customer's requirements and improving overall quality.
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