RWMA Class 12 - Elkonite 30W3 Copper Tungsten | ALCAVIL Technical Data Sheet

RWMA Class 12 - Elkonite 30W3 Copper-Tungsten High Hardness

CuW 80/20

RWMA CLASS 12

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

ELKONITE 30W3 PROPERTIES

Property	Value	Unit
Electrical Conductivity	42	% IACS
Hardness	103	HRB
Density	15.4	g/cm3

NOMINAL COMPOSITION

Copper (Cu)	Tungsten (W)
20%	80%

TYPICAL PHYSICAL PROPERTIES

Property	Typical Value	Unit
Electrical Conductivity	42	% IACS
Hardness	103	HRB
Density	15.4	g/cm3
Melting Point (Cu matrix)	1083	C
Ultimate Strength	98,000	PSI
Cross Breaking Strength	170,000	PSI

RECOMMENDED APPLICATIONS

Heavy duty projection welding electrodes
Die facings for electro-forming
Die facings for electro-forging
Projection of M10+ nuts on AHSS/UHSS
Applications requiring higher hardness than Class 11

KEY FEATURES

MAXIMUM HARDNESS of RWMA grades (103 HRB)
Highest tungsten content (80%)
Excellent for high-strength steels
Superior wear resistance
Extended life under extreme conditions

EQUIVALENT DESIGNATIONS

RWMA Class 12 Elkonite 30W3 CuW 80/20 20% Cu / 80% W W80Cu20

APPLICATION NOTE: Elkonite 30W3 (RWMA Class 12) is the maximum hardness grade (103 HRB) of the CuW family for resistance welding. Used for heavy duty projection welding electrodes, die facings for electro-forming and electro-forging. With 80% tungsten, it is ideal for the most demanding applications: M10 and larger nuts on AHSS/UHSS steels. Used where slightly harder material than Class 11 (10W3) is required for the same applications.