ASTM B702 Standard for Tungstsen Copper Alloy

• Customization: Available
• Type: Cu (Copper/Copper-Alloy Welding Electrode)
• Material: Wcu 70/30, Wcu 75/25, Wcu 80/20, Wcu 90/10
• Model NO.: Tungsten Copper alloy ASTM B702 Standard
• Diameter: Standard or by Drawing
• Length: Standard or by Drawing
• Welding Core Type: Alloy Structual Tungsten
• Electrode Coating Type: Tungsten Alloy
• Function: Surfacing Electrode
• Composition: 65%W35%Cu, 70%W30%Cu, 75%W25%Cu, 80%W20%Cu Copper
• Standard: Rwma Class
• Shapes: Wires, Rods, Bars, Strip, Foil, Block, Plate, Ring
• Application 1: Welding Electrodes
• Application 2: Electrical Contact Materials
• Application 3: Heavy Duty Contact
• Appliation 4: Relays and Switches
• Transport Package: Export Wooden Cases
• Specification: Standard sizes or customized
• Trademark: Kefeng
• Origin: China
• HS Code: 81019990
• Production Capacity: 3000kgs Per Month

Product Description

Product Description

Product mechnical and physical properties

Composition	Density (g/cm3)	Electrical Conductivity (IACS% Min.)	Thermal Conductivity (W/m-K-1)	Hardness (HRB Min.)
WCu 70/30	14.0	52.1	230	95
WCu 75/25	14.8	45.2	220	99
WCu 80/20	15.6	43	200	102
WCu 90/10	16.75	32.5	180	107

They also possess good thermal and electrical conductivity.  We, Kefeng Powder Metallurgy Co., manufactures and supplies DRC Conflict Free material only.

Characteristics and features
 

When processing the Sintered Tungsten Copper Alloys Weld Electrodes, the purity tungsten is pressed, sintered and infiltrated by the oxygen-free copper after the consolidating steps which represents a homogeneous microstructure and low level of porosity. The combination of copper's conductivity with tungsten's high density, hardness and high melting point produces a composite with many preeminent properties of both elements.  Copper-infiltrated tungsten boasts such properties as high resistance to high-temperature and arc-erosion, excellent thermal and electrical conductivity and a low coefficient of thermal.  The physical and mechanical properties and melting point of tungsten copper material will be positively or oppositely affected by varying the amount of copper tungsten in the composite.  As the copper content gradually increases, the electrical and thermal conductivity and thermal expansion exhibit a tendency of being stronger.  But the density, electrical resistance, hardness and strength will be weakened when infiltrated with less amount of copper. In the end, an appropriate chemical composition is the most importance when considering tungsten copper for specific application need.

 

1. Low thermal expansion
2. High thermal and electrical conductivity
3. Low consumption
4. High arc resistance

Application
 

The use of Tungsten copper (W-Cu) has greatly increased in many fields and applications due to its unique mechanical and thermophysical properties. Tungsten copper materials exhibit high outstanding performance in the aspects of hardness, strength, conductivity, high temperature, and arc erosion resistance. It has been extensively used for the production of electrical contacts, heat sinkers and spreaders, die-sinking EDM electrodes and fuel injection nozzles.

1. Resistance welding electrodes
2. Circuit breakers (air or oil immersed)
3. Arcing tips
4. Heavy-duty contactors
5. EDM electrodes
6. Make-and-break contacts
7. Relays/switches

Product Parameters

 

The most significant disadvantage of directly sintering tungsten copper is that tungsten copper's electrical and thermal conductivity is reduced by activation sintering.

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.

Our Advantages

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.