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copper

     
Overview

This alloys group with high copper content, where are included the COPPER - CHROME, COPPER - CHROME - CIRCONIO, COPPER CIRCONIO, CADMIUM COPPER, COPPER - CADMIUM - TIN, COPPER - NICKEL - SILICON and the COPPER - SILICON - MANGAN, is characterized by their good resistance properties to the traction, hardness, resistance to the corrosion, resistance to the oxidation, etc... with a good electrical conductivity. The alloys base of Cr, Zr are submitted to thermal processing to obtain their optimum features. In all the cases the mechanical work to the fact that they may have been submitted influences the final properties..

 

DESIGNATION

K-201

K-202

K-203

K-204

K-205

K-206

K-207

Typesetting nominal chemistry

99 % Cu
1% Cr

98,8 % Cu
1 % Cr
0,2% Zr

99,8%Cu
0,2 % Zr

99 % Cu
1% Cd

94 %Cu
1 % Cd
5% Sn

97% Cu
2 % Ni
1 % Si

96% Cu
3 % Si
1% Mn

Electrical Conductivility % I.A.C.S

75-80

70-80

80-85

75-90

60-70

17-40

7

Hardness Rockwell B R/B
Hardness Brinell HB

49-72
90-130

49-72
90-130

50
92

45-65
85-115

67-76
120-140

67-91 120-190

72-89 130-180

Resistance to the traction Kg/mm²

32-46

32-46

25-32

34-70

45-75

44-75

50-85

Stretching 50 mm %

12-27

12-27

12

10-20

3-7

10-12

10-30

Limit elastic Kg/mm²

18-22

18-22

28

40-55

45-74

40-65

35-85

Softening
temperature °C

500

525

-

250

250

350

250

Weight I specify Kg/dm³

8,9

8,9

8,9

8,9

8,9

8,9

8,55

Equivalences

UNE C-1.170 C.D.A.I. Nª815 & 184 U C 1 de AFNOR R.W.M.A Case II

U C I AFNOR R.W.M.A. Case II

C.D.A.I. N.°150

R.W.M.A Case I

-

-

-

 

APPLICATIONS:

K-201 & K-202

Electrodes, useful and parts of machines of soldering by resistance, rings rubbings, contacts, electrical devices, disks, electrical oven gags, tweezers of welding by resistance, electric wear and tear...

K-203

Contacts, parts electrical machinery...

K-204

Weld electrodes by resistance, electrical lines...

K-205

Telephony

K-206

Electrical contact pieces, high screws resistance...

K-207

Electrotechnics and chemistry engineering.

Supply: Smelting, wrought, print and laminated in plates, bars, tubes and profile.

 

USE OF COPPER ALLOYS AS WELD ELECTRODES BY RESISTANCE
As electrical weld electrodes by resistance by points, by rings, by protuberances and to ceiling are used the alloys, with high copper content K-201 (Copper - chrome), K-202 (copper - chrome - circonio) and K-204 (copper - cadmium), as well as the copper - berilio according to the next recommendations:

K-202.- Is the most usually and used as electrode in a way for the weld by sweet steel points. For rings and covered electrodes in the sweet steel weld and especially adapted for steels to covers.

K-204.- Adapted for the weld by aluminium points.

K-301.- For tweezers arms of welding by points.

K-302.- For the weld by points and by rings of stainless steel and refractory steel, as well as for the weld by protuberances and to ceiling as a rule.

K-303.- For certain weld gags to ceiling and electrodes that support large pressures.
 
 
   
 
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