Tungsten-copper-grades

Tungsten Copper Grades

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SKU: TUCA009 Category: Tag:

Product Description

Tungsten Copper Grades Details

RWMA CLASS

RWMA NO.

RWMA GENERAL USE

RWMA DESCRIPTION

10 copper tungsten

C74450

Flash and butt welding electrodes where good electrical and thermal conductivity is necessary and where a degree of malleability is desired.

A powder metallurgical combination of 45% copper  and 55% of the refractory metal tungsten. Not a true alloy. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, they possess good thermal and electrical conductivity.

11 copper tungsten

C74400

Projection welding electrodes, flash and butt welding electrodes, light upsetting and seam welding bushings. Harder than Class 10 and used where moderate pressure is required. This material can also be used for spot welding low conductivity steels such as stainless.

A powder metallurgical combination of 25% copper and 75% of the refractory  metal tungsten. Not a true alloy. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, They possess good thermal and electrical conductivity.

12 copper tungsten

C74350

Heavy duty projection welding electrodes, electro-forming and electo-forging electrodes facings for upsetting of studs and rivets, cross wire welding of large diameter  wire and rod.

A  powder  metallurgical combination of 20% copper and 80% of the refractory metal tungsten. Not a true alloy. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, they possess good thermal and electrical conductivity.

Chemical Composition Group B Refractory Metals

RWMA CLASS

CDA

DESCRIPTION

CU (incl. Ag)

Fe

W

Cd

Ni

Co

Cr

Si

Be

Pb

Zr

Al

10

C74450

copper tungsten

43 – 47

rem.

11

C74400

copper tungsten (ASTM B702 C1 D)

23 – 27

rem.

– –

12

C74350

copper tungsten (ASTM B702 C1 E)

18 – 22

rem.

Minimum Physical Properties for Tungsten Copper Group B

GROUP B REFRACTORY METALS

HARDNESS ROCKWELL(HRB)

CONDUCTIVITY % I.A.C.S.

ULTIMATE COMPRESSIVE StrENGTH ksi

CLASS 10

rod, bar,inserts

72 HRB

45%

135

CLASS 11

rod, bar,inserts

94 HRB

40%

160

CLASS 12

rod, bar,inserts

98 HRB

35%

170

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