Copper alloys
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 strenght, 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 |
| Chemical composition | 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 (% IACS) |
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 |
| Tensile strenght (Kg/mm²) | 32-46 | 32-46 | 25-32 | 34-70 | 45-75 | 44-75 | 50-85 |
| Elongation 50 (mm %) | 12-27 | 12-27 | 12 | 10-20 | 3-7 | 10-12 | 10-30 |
| Yield strenght (Kg/mm²) | 18-22 | 18-22 | 28 | 40-55 | 45-74 | 40-65 | 35-85 |
| Softening temperature (°C ) | 500 | 525 | - | 250 | 250 | 350 | 250 |
| Density (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 from AFNOR R.W.M.A Class II | UCI from AFNOR R.W.M.A. Class II | C.D.A.I. N.°150 | R.W.M.A Class 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.For any questions or queries we are at your disposal.