RWMA Class 11 - Elkonite 10W3 Copper Tungsten | ALCAVIL Technical Data Sheet

RWMA Class 11 - Elkonite 10W3 Copper-Tungsten

CuW 75/25

RWMA CLASS 11

Ref: AWS J1.3/J1.3M:2020 - Specification for Materials Used in Resistance Welding Electrodes and Related Equipment

ELKONITE 10W3 PROPERTIES

Property	Value	Unit
Electrical Conductivity	46	% IACS
Hardness	98	HRB
Density	14.70	g/cm3

NOMINAL COMPOSITION

Copper (Cu)	Tungsten (W)
25%	75%

TYPICAL PHYSICAL PROPERTIES

Property	Typical Value	Unit
Electrical Conductivity	46	% IACS
Hardness	98	HRB
Density	14.70	g/cm3
Melting Point (Cu matrix)	1083	C
Ultimate Strength	90,000	PSI
Cross Breaking Strength	150,000	PSI

RECOMMENDED APPLICATIONS

Facings and inserts for flash and butt welding dies
Projection welding electrodes
Seam welding electrodes
Facings for electro-forming and electro-forging dies
EDM electrodes for higher wear resistance
Standard nut projection welding

KEY FEATURES

MOST COMMON grade for projection
Optimal hardness/conductivity balance
Higher hardness than 5W3 (Class 10)
Excellent wear resistance
Widely used in the industry

EQUIVALENT DESIGNATIONS

RWMA Class 11 Elkonite 10W3 CuW 75/25 25% Cu / 75% W W75Cu25

APPLICATION NOTE: Elkonite 10W3 (RWMA Class 11) is the most common grade in the CuW family. Used for facings and inserts for flash and butt welding dies, projection electrodes, seam welding electrodes, facings for electro-forming and electro-forging dies. Commonly used for EDM electrodes due to its higher wear resistance. Class 12 (30W3) is used where a slightly harder material is required for the same applications.