Audited Supplier
B08
780°c
OEM, ODM
1-2 Weeks
RoHS, ISO 9001, ISO 14001, GB/T 29490
Air Freight
XianYi
Bulk, Waffle Box, Tape and Reel, Film-Wrap Package
Ag72Cu28 Preform
Guangzhou
7115901010
Product Description
Ag72Cu28 Solder Preforms
Features:
- Eutectic solder with a melting temperature of 780 ºC
- Good wettability
- Good thermal and electrical performance
- Excellent mechanical performance
- High corrosion resistance and reliability
Description:
Silver-based brazing filler metal is one of the most widely used brazing filler metals due to its appropriate melting point, good electrical conductivity, high strength and plasticity, good processing performance and corrosion resistance. The typical silver based brazing filler metal eutectic Ag72Cu28 alloy has suitable melting
temperature, good wettability and high brazing quality, making it widely used in the production of vacuum electron devices. Ag72Cu28 can be used for brazing many common metals such as low carbon steel, stainless steel, high temperature alloys, molybdenum, nickel, copper, kovar alloy and refractory alloys.
Solder Composition:
Physical Properties:
Method of Use:
Reflow Profile
Reflow profile of Ag78Cu28 Solder Preforms
(For reference only, the reflow profile should be adjusted according to the actual soldering situation)
Operation Details:
- Picking up:
Use an anti-static tools to pick up the solder to prevent solder contamination and deformation.
- Operating environment:
Dimension Tolerance:
Storage and Product Management:
- Storage
The best storage temperature of this product is 25±5 ºC, and the relative humidity is no higher than 55%RH.
- Product management
Keep container tightly closed when product is not in use.
Safety:
- Please use this product with adequate ventilation and certain personal protection conditions.
- Please do not mix with other toxic chemicals.
List of Common Solders
*Note : In this table, "e" indicates eutectic alloys, "ne" indicates near eutectic alloys and "mp" indicates the melting point of simple substance. Other alloys can be customized for your requirement. For more details please contact us.
Features:
- Eutectic solder with a melting temperature of 780 ºC
- Good wettability
- Good thermal and electrical performance
- Excellent mechanical performance
- High corrosion resistance and reliability
Description:
Silver-based brazing filler metal is one of the most widely used brazing filler metals due to its appropriate melting point, good electrical conductivity, high strength and plasticity, good processing performance and corrosion resistance. The typical silver based brazing filler metal eutectic Ag72Cu28 alloy has suitable melting
temperature, good wettability and high brazing quality, making it widely used in the production of vacuum electron devices. Ag72Cu28 can be used for brazing many common metals such as low carbon steel, stainless steel, high temperature alloys, molybdenum, nickel, copper, kovar alloy and refractory alloys.
Solder Composition:
| Element | Wt% |
| Silver (Ag) | Margin |
| Copper (Cu) | 28.0 ± 1 |
Physical Properties:
| Product name | Melting point/ºC solid / liquid phase | Density g/cm3 | Resistivity µΩ·m | Thermal conductivity W/m·K | Thermal expansion coefficient 10-6/ºC | Tensile strength Mpa |
Ag72Cu28 | 780 | 10.00 | 0.022 | 352 | 17.8 | 250~360 |
Method of Use:
Reflow Profile
| Preheating stage | Heat preservation stage | Soldering stage | Cooling stage | |
| 25ºC ~ (680-700) ºC | (700-780) ºC | (780-820) ºC | →400ºC | →25ºC |
| Time | Time | Time | Cooling rate | |
| 10 ~ 20ºC/min | 40-60min | 5-10min | 8-12ºC/s | 1-3ºC/s |
(For reference only, the reflow profile should be adjusted according to the actual soldering situation)
Operation Details:
- Picking up:
Use an anti-static tools to pick up the solder to prevent solder contamination and deformation.
- Operating environment:
| Atmosphere | Parameter requirements |
| N2 | Oxygen concentration(200~ 1000ppm) |
| Vacuum | Vacuum degree ≤ 2.0×10-3Pa |
Dimension Tolerance:
| Thickness(t) | Typical tolerances for length, width or diameter(L/W/D) | |
| t <0.40mm | ±0.02mm | |
| 0.40mm≤ t <1.00mm | ±0.03mm | |
| t ≥1.00mm | ±0.05mm | |
| Thickness(t) | Thickness (t) | |
| Conventional solder alloys | Indium alloy | |
| t<0.05mm | ±0.005mm | ±0.01mm |
| 0.05mm≤ t <0. 10mm | ±0.008mm | ±0.01mm |
| 0. 10mm≤ t <0.20mm | ±0.01mm | |
| 0.20mm≤ t <0.40mm | ±0.02mm | |
| 0.40mm≤ t <1.00mm | ±0.03mm | |
| t ≥1.00mm | ±5% | |
Storage and Product Management:
- Storage
The best storage temperature of this product is 25±5 ºC, and the relative humidity is no higher than 55%RH.
- Product management
Keep container tightly closed when product is not in use.
Safety:
- Please use this product with adequate ventilation and certain personal protection conditions.
- Please do not mix with other toxic chemicals.
List of Common Solders| Category | Products | Solidus(ºC) | Liquidus(ºC) | Density (g/cm3) | Resistivity (μΩ·m) | Thermal Conductivity (W/m ·K) | CTE (10-6/ºC) | Tensile Strength (MPa) |
Solder Metal | In51Bi32.5Sn16.5 | / | 60(e) | 7.88 | 0.522 | / | 22 | 33.44 |
| In66.3Bi33.7 | / | 72(e) | 7.99 | / | / | / | / | |
| Bi50Pb28Sn22 | / | 100(e) | 9.44 | / | / | / | / | |
| In52Sn48 | / | 118(e) | 7.3 | 0. 147 | 34 | 20 | 12 | |
| In50Sn50 | 118 | 125 | 7.3 | 0. 147 | 34 | 20 | 11.86 | |
| Bi58Sn42 | / | 138(e) | 8.56 | 0.383 | 19 | 15 | 55. 16 | |
| Bi57Sn42Ag1 | 138 | 140 | 8.57 | / | / | / | / | |
| In97Ag3 | / | 143(e) | 7.38 | 0.075 | 73 | 22 | 5.5 | |
| Sn43Pb43Bi14 | 144 | 163 | 9.02 | / | / | 24 | 44. 1 | |
| In80Pb15Ag5 | 149 | 154 | 7.85 | 0. 133 | 43 | 28 | 17.58 | |
| Sn53Pb37Bi10 | 150 | 168 | 8.65 | / | / | / | / | |
| Sn70Pb18In12 | 154 | 167 | 7.79 | 0. 141 | 45 | 24 | 36.68 | |
| In100 | / | 157(mp) | 7.31 | 0.072 | 86 | 29 | 1.88 | |
| In70Pb30 | 165 | 175 | 8. 19 | 0. 195 | 38 | 28 | 23.79 | |
| In60Pb40 | 174 | 185 | 8.52 | 0.246 | 29 | 27 | 28.61 | |
| Sn77.2In20Ag2.8 | 175 | 187 | 7.25 | 0. 176 | 54 | 28 | 46.88 | |
| Sn62Pb36Ag2 | / | 179(e) | 8.42 | 0. 145 | 42 | 27 | 44 | |
| Sn63Pb37 | / | 183(e) | 8.4 | 0. 146 | 51 | 25 | 52 | |
| In50Pb50 | 184 | 210 | 8.86 | 0.287 | 22 | 27 | 32.2 | |
| Pb60In40 | 197 | 231 | 9.3 | 0.331 | 19 | 26 | 34.48 | |
| Sn86.9In10Ag3. 1 | 201 | 205 | 7.37 | / | / | / | / | |
| Au10Sn90 | / | 217(e) | 7.78 | / | / | / | 50.2 | |
| SAC387(Sn95.5Ag3.8Cu0.7) | / | 217(ne) | 7.4 | 0. 132 | 57 | 22 | 48 | |
| SAC305(Sn96.5Ag3.0Cu0.5) | 217 | 218 | 7.37 | 0. 132 | 58 | 21 | 50 | |
| Sn96.5Ag3.5 | / | 221(e) | 7.37 | 0. 108 | 33 | 30 | 39 | |
| Sn99.3Cu0.7 | / | 227(e) | 7.31 | / | / | / | / | |
| Sn100 | / | 232(mp) | 7.29 | 0. 111 | 73 | 24 | 13. 1 | |
| Sn65Ag25Sb10 | / | 233(e) | 7.8 | / | / | 36 | 117.2 | |
| Sn95Sb5 | 235 | 240 | 7.25 | 0. 145 | 28 | 31 | 40.7 | |
| Sn90Sb10 | 240 | 250 | 7.22 | / | 42 | 27 | 44 | |
| Pb75In25 | 240 | 260 | 9.97 | 0.375 | 18 | 26 | 37.58 | |
| Pb88Sn10Ag2 | 268 | 290 | 10.75 | 0.203 | 27 | 29 | 22.48 | |
| Pb90Sn10 | 275 | 302 | 10.75 | / | / | 24.6 | 32 | |
| Au80Sn20 | / | 280(e) | 14.52 | 0.224 | 57 | 16 | 276 | |
| Pb92.5Sn5Ag2.5 | 287 | 296 | 11.02 | 0.2 | 29 | 24 | 29.03 | |
| Pb90Sn5Ag3In2 | 294 | 297 | 10.89 | / | / | / | / | |
| Pb92.5In5Ag2.5 | 300 | 310 | 11.02 | 0.313 | 25 | 25 | 31.44 | |
| Au88Ge12 | / | 361(e) | 14.67 | 0. 151 | 44 | 13.4 | 185 | |
| Au96.8Si3.2 | / | 363(e) | 15.4 | / | 27 | 12 | 255 | |
| Au98Si2 | 363 | 390 | 16.92 | / | / | / | / | |
Brazing Metal | Ag60Cu30Sn10 | 600 | 720 | 9.58 | / | / | / | / |
| Ag72Cu28 | / | 780(e) | 10 | / | 352 | 17.8 | 250-360 | |
| Ag50Cu50 | 780 | 870 | 9.67 | / | / | / | / | |
| Au60Ag20Cu20 | 835 | 845 | 13.79 | / | / | / | / | |
| Ag92.5Cu7.5 | / | / | 10.37 | / | / | / | / | |
| Au80Cu20 | / | 910(e) | 15.67 | / | / | / | / | |
| Au50Cu50 | 955 | 970 | 12.22 | / | / | / | / | |
| Ag100 | / | 961(mp) | 10.49 | 0.0163 | 429 | / | 180 | |
| Au100 | / | 1064(mp) | 19.3 | 0.0221 | 318 | 14 | 138 | |
| Cu100 | / | 1083(mp) | 8.96 | 0.0172 | 401 | / | 246 |
