![]() ![]() ![]() | CuNi1Si EN: CW109C UNS: C19010, C19015 | ![]() |
CuNi1Si(LNSP)
CuNi1Si(STOL76)
A copper alloys containing nickiel and silicon are heat treated. CuNi1Si has excellent cold and hot forming, good resistance to atmospheric corrosion, high mechanical and electrical properties, high wear resistance and fatigue strength.
Basic properties
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Density [g/cm3] | Specific heat capacity [J/(kg*K)] | Temperature coefficient of electrical resistance (0...100°C) [10-3/K] | Electrical conductivity [T=20°C, (% IACS)] | Thermal conductivity [W/(m*K)] | Thermal expansion coefficient 20...300°C [10-6/K] |
8,9 | 377 | 2 | 29-60 Comments: (17-35 MS/m) | 85-260 | 16,8 |
Connectors, slide bearings, leadframe, electrical contact elements, clips for electrical contact lines, power supply and grounding, high corrosion resistance mechanical equipment, fittings. Literature:
Chemical composition
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Value | Comments | |
Cu [ wt.% ] | 97,08-98,3 | Calculated | |
Fe [ wt.% ] | 0-0,2 | ||
Mn [ wt.% ] | 0-0,1 | ||
Ni [ wt.% ] | 1,0-1,6 | ||
Pb [ wt.% ] | 0-0,02 | ||
Si [ wt.% ] | 0,4-0,7 | ||
Others [ wt.% ] | 0,3 |
Mechanical properties
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UTS [MPa] | YS [MPa] | Elongation [%] | Hardness | Young’s modulus [GPa] | Kirchhoff’s modulus [GPa] | Poisson ratio |
240-650 | 90-620 | 5-25 | 100-205 Comments: [HV] | 128 | No data | No data |
Material's mechanical and electrical properties in different tempers
Temper | Tensile strength, MPa | Yield strength (min), MPa | Elongation (min)A50mm, % | Hardness | Literature |
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R360/H100 | 360-430 | 250 | 12 | 100-130 HV | ![]() |
R410/H130 | 410-480 | 360 | 10 | 130-150 HV | |
R460/H140 | 460-530 | 430 | 8 | 140-160 HV | |
R520/H150 | 520-570 | 490 | 5 | 150-170 HV | |
R580/H175 | 580-650 | 540 | 6 | 175-205 HV | |
R440, Rod | 440 | 300 | 16 (Lo=5,65*(So)0,5) | EN 12163 (2011) | |
R540, Rod | 540 | 470 | 10 (Lo=5,65*(So)0,5) | ||
R590, Rod | 590 | 540 | 12 (Lo=5,65*(So)0,5) | ||
R440, Wire | 440 | 300 | 16 (Lo=5,65*(So)0,5) | EN 12167 (2011) | |
R540, Wire, rod, sheet, strip, tube. | 540 | 470 | 12 (Lo=5,65*(So)0,5) | ||
R590, Wire, rod, sheet, strip, tube. | 590 | 540 | 10 (Lo=5,65*(So)0,5) | ||
R240, Rod | min. 240 | 90 | 25 (A100) | ![]() |
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R300, Rod | min. 300 | 210 | 16 (A) | ||
R350, Rod | min. 350 | 280 | 12 (A) | ||
R410, Rod | min. 410 | 320 | 5 (A100) | ||
R440, Rod | min. 440 | 320 | 12 (A100) | ||
R500, Rod | min. 500 | 420 | 10 (A) | ||
R540, Rod | min. 540 | 450 | 10 (A) | ||
R590, Rod | min. 590 | 570 | 8 (A100) | ||
R250, Profile | min. 250 | 100 | 35 (A) | ||
R380, Profile | min. 380 | 250 | 8 (A) | ||
R420, Profile | min. 420 | 260 | 15 (A) | ||
R560, Profile | min. 560 | 520 | 10 (A) | ||
R410, Wire | min. 410 | 400 | 6 (A11,3) | ||
R450, Wire | min. 450 | 440 | 5 (A100) | ||
R590, Wire | min. 590 | 580 | 7 (A100) | ||
R650, Wire | min. 650 | 620 | 7 (A100) |
Modulus of elasticity vs. temperature of CuNi1Si
Mechanical properties vs. temperature below 0°C of CuNi1Si (age hardened at 450°C for 2 hour)
Electrical conductivity vs. annealing temperature of CuNi2Si
Heat resistance of CuNi1Si
Influence of annealing temperature and time on CuNi1Si mechanical properties after cold deformation of 80%
Effect of Temperature on the strength and fracture toughness of precipitation hardened CuNiSi
Type of corrosion | Suitability | Literature |
---|---|---|
Atmospheric | Good | |
Marine environment | Good | |
Stress crack | Not resistant | |
Hydrogen embrittlement | No data | - |
Electrolytic | No data | - |
Other | No data | - |
Residual stress of CuNi1Si at 150°C (temper R580)
Creep strength of CuNi1Si supersaturated hardened
Creep strength of CuNi1Si thermally hardened
Fatigue strength on bending vs number of cycles of CuNi1Si
Measured J versus crack extension, ∆a, from a series of fracture toughness tests at -80oC with CT precipitation hardened CuNiSi specimens. ∆a assumed as half the height of the triangular fractured surface .
Measured J versus crack extension, ∆a, from a series of fracture toughness tests at -196oC with CT precipitation hardened CuNiSi specimens. ∆a assumed as half the height of the triangular fractured surface
Fabrication properties
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Value | Comments | |
Soldering | good | ||
Brazing | fair | ||
Hot dip tinning | good | ||
Electrolytic tinning | good | ||
Electrolytic silvering | good | ||
Electrolytic nickel coating | good | ||
Laser welding | fair | ||
Oxyacetylene Welding | not recommended | ||
Gas Shielded Arc Welding | fair | ||
Spot Weld | good | ||
Seam Weld | good | ||
Butt Weld | good | ||
Capacity for Being Cold Worked | good | ||
Capacity for Being Hot Formed | good | ||
Machinability Rating | 30 |
The variations of hardness and electrical resistivity of Cu1.5 Ni-0.3Si-0.03P-0.05Mg leadframe alloy with varying aging time at 450°C. Cu-1.5Ni-0.3Si-0.03P-0.05Mg is cold rolled 80% and aged at 450°C after solution treatment; (a) hardness, (b) electrical resistivity .
The comparison of tensile strength and elongation of Cu-1.5Ni-0.3Si-0.03P-0.05Mg leadframe alloy with different initial grain size; (a) initial grain size of 10 µm after solution treatment at 700°C, (b) initial grains size of 15 µm after solution treatment at 800°C .
The variation of (a) hardness and (b) electrical resistivity of Cu-1.5Ni-0.3Si-0.03P-0.05Mg leadframe alloy cold rolled to 40, 70, 85% with increasing aging time at 450°C .
The variation of tensile properties of Cu-1.5Ni-0.3Si-0.03P- 0.05Mg leadframe alloy with varying cold rolling ratio from 40 to 85% at peak aged condition at 450°C .
The dependence of the microhardness on the aging time of CuNi3Si and CuNi1Si. (Note: Samples (strip) was solution heat-treated for 1 h at 1173 K in an argon atmosphere and water quenched)
Technological properties
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Melting temperature [°C] | Casting temperature [°C] | Castability | Annealling temperature [°C] | Homogenization temperature [°C] | Quenching temperature [°C] | Ageing temperature [°C] | Stress relievieng temperature [°C] | Hot working temperature [°C] |
1050-1070 | No data | No data | 650-750 | 750-850 | No data | 425-490 | No data | 800-900 |
