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Dispersion Strengthened Copper C15760,  RWMA Class 20, AWS J1.3


C15760 is a  dispersion of aluminum oxide within a copper matrix that exhibits good resistance to softening and room temperature properties consistent with RWMA Class 20.


Chemical Compositions of RWMA Materials   Group C  - Specialty Materials
RWMA Class UNS Number Description Cu Fe W Cd Co Ni Cr Si Be Pb Zr Al
20 C15760 Dispersion Strengthened Copper  98.77% 0.01% Max - - - - - - - 0.01% Max - 0.58-0.62% as A12O3

Cu: Copper

Fe: Iron

Pb: Lead

Al: Aluminium 


Typical usages of RWMA Class 20 copper alloy: C15760 is suited for welding of metallic coated metal such as galvanized steel, terne plates, etc.





Back-up Electrodes

Caps & Shanks

Circuit Breaker Parts


Cross Wire Welding

Electrical & Mechanical Power Components

Flash & Butt Welding Dies

Heat Flux Components

Joining Components

Nut & Stud Welding Electrodes

Threaded Electrodes





Item Name:  Dispersion Strengthened Copper C15760
Shape: Bar
RWMA (Resistance Welding Manufacturing Alliance) Class: Class 20
Principal Element: Cu, Al oxide
Minimum Hardness Rockwell (up to 1" dia.): HRB 75
Minimum Electrical Conductivity (% IACS): 75

Quality Assurance


Quality Policy: Cadi Company Inc. is dedicated to world-class excellence. Our commitment is to continually achieve the highest standards required to meet our customer’s needs.  Cadi is committed to a policy of continuous improvement within all areas of the organization through customer communication, by means of quality planning and review, as well as employee training and participation to achieve the Cadi commitment goal of 100% in quality, effectiveness, and customer satisfaction.


Quality Objectives: Cadi Company, Inc. is committed to the development and implementation of the ISO Quality Management System. We pledge that through the efforts of all our employees working together as a team, we will continually strive to be a leader (in our markets) in satisfying our customers’ needs with regard to service, performance, and competitive pricing. Cadi shall maintain global and domestic sources to provide quality products as required by our customers. Cadi will provide our customers with the highest level of satisfaction by achieving the goal of 100% in the areas of product quality and on-time delivery performance.


Cadi Company is committed to providing goods and services that meet or exceed our customer’s requirements and expectations. It is our firm belief that this dedication to the highest standards is the cornerstone of our existence.

  • We have the equipment and processes to guarantee the quality of the products we manufacture.
  • We continually upgrade our equipment and have ongoing training company-wide.
  • Each order undergoes stringent Quality Assurance Processes to assure accuracy and precision to the client’s specifications and is verified throughout the manufacturing cycle with scheduled quality assurance audits.
  • All material is subject to detailed physical tests where microstructures, tensile, yield strength, U.T. testing, eddy current conductivity, elongation, and hardness are measured and reported.
  • Climate-controlled inspection facility.
  •  We have a Metallurgical Engineer on-site for any technical questions.


To ensure Cadi follows rigorous quality and procedural protocols we are ISO 9001:2015 Certified and have been for over 18 years.


ISO Certification: 9001:2015 (Registration # 10002745 QM15 Valid until 2024-08-21)
Reports: Certification of Compliance
Chemical Analysis
Final Inspection
Material Test Reports
Mechanical and Physical Testing: Elongation
Grain Size
Nondestructive Testing: Chemical Analysis
Liquid Penetrant
Alloy Applications Cross Reference Chart C15000 C18150 C18000 C18200 C17510 C17200 C15760
Axial Conductors X            
Back-up Electrodes X X X X X X X
Bushings X X X X X    
Caps & Shank X X X X X X X
Casting Wheels X X   X      
Casting Wheels and Dam Blocks     X   X X  
Centrifugal Casting Mold X X X X      
Circuit Breaker Parts X X   X     X
Collector Connector X X   X       
Collector Housing X X   X      
Connector Bar X X   X      
Connectors X X X X X   X
Connection Lead Bar X X   X      
Continuous Casting Molds X X X X X X  
Cross Wire Welding Electrodes & Components X X X X X X X
Damper Ring/Finger X X X X      
Dies & Fixtures X X X X X X  
Die Casting Pistons     X   X X  
Die Casting Plunger Tips     X   X X  
Electrode Holders & Adaptors X X X X X X  
Electrical & Mechanical Power Components X X X X X X X
Flash & Butt Welding Dies X X X X X X X
Flexible Connector X X   X      
Heat Flux Components X X X X X   X
Injection Blow Molds & Dies   X X X X X  
Joining Components X   X   X X X
Lead Conductor Bar X X   X      
Motor End Rings X X X X X    
Neutral Bus Bar X X   X      
Non-Sparking Applications   X X X X X  
Nut & Stud Welding Electrodes X X X X X X  
Performance Engine Components     X   X X  
Permanent Molds     X   X X X
Power Generation Products X X X X      
Power Semiconductor Bases X X   X      
Resistance Welding Electrodes X X X X X X  
Rotor Coil Bar X X   X      
Seam Weld Wheels X X X X X X  
Series Loop Segment X X   X      
Shafts X X X X X X  
Slip Rings X X   X      
Slot Wedge X X X X      
Snap Rings X X   X      
Special Nipple X X   X      
Terminal Box Connectors X X   X      
Threaded Electrodes X X X X X X  
Transmission Devices X X   X     X
Water Clip X X   X      
Wear Plates           X  
Welding Arms X X X X X X  
Welding Blocks X   X   X X  
Welding Connectors X X X X X X  
Welding Platens X X X X X X