![]() ![]() ![]() | CuSn0,5 EN: CW129C UNS: C18835 | ![]() |
CuSn (CuSn0,2 - CuSn0,5) material with 0,2-0,55% is tin addition id single phase copper alloy with good mechanical and high electrical properties connected with high wearing resistance. Material has higher than pure copper softening temperature and good creep, stress relaxation fatigue resistance. The alloy permits good corrosion resistance and has no stress cracking corrosion.
Main applications are connected with electric current transfer in electro-industry. Possible applications: trolley wires, wiring harnesses, connectors and connector pins, sliding contacts, electric springs, automotive electric parts, electromechanical components, forged parts.
Literature:
Rolled strips, rolled tinned strips, rolled profiles with different height, extruded round or polygonal rods, extruded sections, extruded tubes, drawn round or polygonal wires, drawn tubes.
Chemical composition
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Value | Comments | |
Cu [ wt.% ] | 99,35-99,85 | Calculated | |
Sn [ wt.% ] | 0,15-0,55 | ||
Others [ wt.% ] | 0-0,10 |
Chemical composition, wt% | ||||||
---|---|---|---|---|---|---|
Sn | Fe | P | Pb | Zn | Others | Cu |
0,15-0,55 | max. 0,10 | max. 0,01 | max. 0,05 | max. 0,3 | max. 0,5 | Cu+Fe+Pb+P+Zn min. 99,5 |
Literature: |
Mechanical properties
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||||||
UTS [MPa] | YS [MPa] | Elongation [%] | Hardness | Young’s modulus [GPa] | Kirchhoff’s modulus [GPa] | Poisson ratio |
270-620 | No data | 3-30 | No data | 120-125 | No data | No data |
Material's mechanical and electrical properties in different tempers/ diameters -wires
Temper /diameter |
Ultimate Tensile Strength UTS [MPa] |
Electrical conductivity |
Elongation at break during tensile test A50 [%] |
Hardness [HV] |
Literature: |
---|---|---|---|---|---|
annealed |
max. 300 |
min. 68 |
- |
- |
|
3,5 |
min. 485 |
min. 68 |
- |
- |
|
3,0 |
min. 510 |
min. 68 |
- |
- |
|
2,5 |
min. 540 |
min. 68 |
- |
- |
|
2,0 |
min. 570 |
min. 68 |
- |
- |
|
1,5 |
min. 610 |
min. 68 |
- |
- |
|
1,3 |
min. 620 |
min. 68 |
- |
- |
Material's mechanical and electrical properties in different cross sections - trolley wires
Cross section [mm] |
Ultimate Tensile Strength UTS [MPa] |
0,2%Yield strength YS [MPa] |
Elongation at break during tensile test A50 [%] |
Electrical conductivity [%IACS] |
Literature |
---|---|---|---|---|---|
80 |
min. 460 |
min.370 |
3-8 |
min. 72 |
|
100 |
min. 450 |
min. 370 |
3-8 |
min. 72 |
|
107 |
min. 430 |
min. 370 |
3-8 |
min. 72 |
|
120 |
min. 420 |
min. 370 |
3-8 |
min. 72 |
|
150 |
min. 420 |
min. 370 |
3-8 |
min. 72 |
Material's mechanical and electrical properties in different tempers (non european standards)
Temper |
Ultimate Tensile Strength UTS [MPa] |
Electrical conductivity [MS/m] |
Elongation at break during tensile test A50 [%] |
Hardness [HV] |
Literature |
---|---|---|---|---|---|
Soft O 10 |
max 303 |
min. 70 |
- |
- |
|
1/2H |
typical 358 |
min. 70 |
- |
- |
|
H |
typical 434 |
min. 70 |
- |
- |
|
Spring |
typical 496 |
min. 70 |
- |
- |
|
Extra spring |
min. 531 |
min. 70 |
- |
- |
Automotive cable electrical and mechanical properties
Alloying element concentration in copper |
Ultimate Tensile Strength UTS [MPa] |
Electrical conductivity [MS/m] |
Elongation at break during tensile test A50 [%] |
Hardness [HV] |
Literature |
---|---|---|---|---|---|
0,25-0,35%Sn |
min. 620 |
max. 43,5 |
min.1 |
- |
|
Levels of electrical and mechanical properties of material in different tempers
Elongation at break vs ultimate tensile strength at ambient temperature for material in different temper (0,42%Sn)
Ultimate tensile strength of material as a function of cold working strain measured ambient temperature, (0,42%Sn)
Yield Strength as a function of strain (cold rolling), temperature 22oC (0,5%Sn)
Relation between yield strength and material grain size (Hall-Petch relationship, 0,3%Sn)
Relation between Hall-Petch relationship constant and tin content
Changes in mechanical behaviours of wire specimens processed and changes in grain size after final annealing and non-conventional processing by draw bending, material: Cu 0,27%Sn
Sample name |
Final annealing condition | |
---|---|---|
Temperature |
Time | |
Fully annealed specimen (εWD=0,0) |
673 K |
600s |
1/2EL specimen |
623 K |
600s |
1/4EL specimen |
623 K |
360s |
1/2TS specimen |
623 K |
60s |
3/4TS specimen |
573 K |
240s |
WD specimen (εWD=7,2) |
- |
- |
Ultimate tensile stress vs total elongation for specimens in table
Mean grain size for specimens in table
Tin content effect on electrical conductivity of copper at ambient temperature
Tin content effect on Young’s modulus of material at ambient temperature (values calculated from approximation of experimental data)
Yield strength vs testing temperature relation for material in annealed temper (0,3%Sn)
Annealing temperatures for materials with different grain sizes, time of heating 0,5h (0,3%Sn)
Half softening temperature: 340-370 °C (0,4%Sn)
Type of corrosion | Suitability | Literature |
---|---|---|
Atmospheric | no data | - |
Marine environment | no data | - |
Stress crack | no data | - |
Hydrogen embrittlement | no data | - |
Electrolytic | no data | - |
Other - oxidising acids | no data | - |
Cooper -tin alloy CuSn0,4 shows 60% better wearing resistance due to pure ETP copper (materials in hard tempers)
Wear rate data for trolley wire made from Cu (reference) and CuSn alloy and copper contact strip with and without electric current flow and with different friction conditions
Material bending fatigue life for different surface strains, material grain size 10µm (0,3%Sn)
Fabrication properties
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Value | Comments | |
Soldering | excellent | ||
Brazing | excellent | ||
Oxyacetylene Welding | fair | ||
Gas Shielded Arc Welding | fair | ||
Capacity for Being Cold Worked | excellent | ||
Capacity for Being Hot Formed | excellent | ||
Forgeability Rating | 65 |
