Preformed Solder Bumps Strip Lead-Free Solder Bars
Product Description
Lead-free solder
Sn-0.7Cu alloy
The Sn-0.7Cu alloy is a eutectic alloy of Sn and Cu, and the
eutectic temperature is 227°C. Generally speaking, the working
temperature of Sn-0.7Cu alloy for wave soldering is about 245-260℃,
and users can also make appropriate adjustments according to the
equipment and process conditions used.
Sn-0.7Cu solder advantages:
●High strength and anti-drop performance, with good mechanical
properties and solder joint reliability
●Low sensitivity to impurity elements, stable performance and easy
recovery, more in line with environmental protection requirements
●Suitable for various welding processes: wave soldering, tin
furnace tin plating process, etc.
●Pb-free alloy without silver, with lower cost.
SAC305 Solder Advantages
The yield is better than SAC0307, and the bridging resistance is
better than Sn/Cu0.7 alloy; very good fluidity reduces the bridging
level;
●The typical wetting speed is 0.65sec, which is equivalent to
0.75sec of SAC0307, far better than Sn/Cu0.7 alloy;
●High purity, low oxide, low tin dross generation;
●Good solderability; fast wetting speed; higher yield,
●Compatible with various fluxes.
●Thermal cycle performance
Lead-free alloy type
| alloy composition | melting point(℃) | proportion | use |
| solidus | liquidus | (g/cm3) | |
| 1 | Sn-Cu0.7 | 227 | 227 | 7.32 | Dip Soldering, Wave Soldering
Tin furnace added |
| 2 | Sn-Ag0.3-Cu0.7 | 217 | 228 | 7.33 |
| 3 | Sn-Ag3.0-Cu0.5 | 217 | 218 | 7.40 |
| 4 | Sn99.95 | 232 | 232 | 7.28 | Wave Soldering Addition to Reduce Copper Content |
| 5 | Sn-Ag3.5 | 221 | 221 | 7.37 |
| 6 | Sn-Sb5 | 240 | 245 | 7.25 | |
| 7 | Sn-Bi58 | 138 | 138 | 8.54 | low temperature welding |
| 8 | Sn-In52 | 118 | 118 | 7.3 | low temperature welding |
Other solder alloys are available upon request.
Advantage
Strong antioxidant capacity
Good liquidity and sufficient volume
Easy to use and no cleaning
High-purity metal raw materials
Be applicable
It is used for PCB circuit boards, metal shells, metal-glass
packages, semiconductor integrated circuits, filter devices,
microwave devices, high-power devices, connectors, sensors, and
metal shells or ceramic shells for hermetically sealed packaging of
optoelectronic devices.
Generally divided into:
Standard Type: 0.025mm, 0.05mm
Thinner: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm
Thicker type: 0.5mm-1.0mm
Thickened type: 1.0mm or more
Width: generally about 50mm
For example: 50*0.05mm, which means the width is 50mm and the
thickness is 0.05mm.
Tip: Other thicknesses and widths can be customized according to
customer requirements
Packaging and Shipping
Packing Details : Carton and wooden box packaging
Delivery Details : 5-10 days(Negotiated and decided on a
case-by-case basis)
FAQ
1.Are you trading or manufacturer ?
We are company,and we have our own factory
2.How long is your delivery time?
| Quantity(kilograms) | 1 - 500 | >500 |
| Est. Time(days) | 10 | To be negotiated |
3.Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but do not pay the
cost of freight.
If you have another question, pls feel free to contact us
