Copper Tungsten Alloys

CLASS 10

30% COPPER AND 70% TUNGSTEN

 ELECTRICAL CONDUCTIVITY % IACS 

ROCKWELL HARDNESS

ULITMATE STRENGTH PSI

CROSS BREAKING STRENGTH PSI

DENSITY GMS/CC

48

90B

85,000

140,000

14.18

 Light duty projection welding dies where weld pressures are medium to light.

CLASS 11

25% COPPER AND 75% TUNGSTEN

 ELECTRICAL CONDUCTIVITY % IACS 

ROCKWELL HARDNESS

ULITMATE STRENGTH PSI

CROSS BREAKING STRENGTH PSI

DENSITY GMS/CC

46

98B

90,000

150,000

14.7

Used for facings and inserts for flash and butt welding dies, projection welding electrodes, seam welding, bearing inserts, facings for electro forming and electro-forging dies.  often used for EDM electrodes for grater wear ratios. 

CLASS 11 AND CLASS 12

22% COPPER AND 78% TUNGSTEN

 ELECTRICAL CONDUCTIVITY % IACS 

ROCKWELL HARDNESS

ULITMATE STRENGTH PSI

CROSS BREAKING STRENGTH PSI

DENSITY GMS/CC

44

99B

94,000

160,000

14.8


Class 12 is used where a slightly harder materioal is required for the same applications as Class 11. 

CLASS 12

20% COPPER AND 80% TUNGSTEN

 ELECTRICAL CONDUCTIVITY % IACS 

ROCKWELL HARDNESS

ULITMATE STRENGTH PSI

CROSS BREAKING STRENGTH PSI

DENSITY GMS/CC

42

103B

98,000

170,000

15.4

Heavy duty projection welding electrodes, die facings for electro-forming and electro-forging, also facings for upsetting of rivets and studs