|
|
|||||||||
| Software: RF Cascade Workbook | RF Symbols for Office | RF Symbols & Stencils for Visio | Espresso Workbook | ||||||||||
|
|||||||||||||||||||||||||||||||
   |
   |
||||||||||||||||||||||||||||||
|
Please Support RF Cafe by purchasing my ridiculously low-priced products, all of which I created. RF & Electronics Symbols for Visio RF & Electronics Symbols for Office RF & Electronics Stencils for Visio T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads These Are Available for Free |
|||||||||||||||||||||||||||||||
Solder Properties
Values presented in the table below are for some of
the most commonly used solders. With the push for lead-free (Pb-free) versions that
conform the the RoHS1 initiative that will be in effect in Europe in
the summer of 2006, new alloys have been developed that use little or no lead at
all. For those application, this resource compiled by NIST2 and the Colorado
School of Mines will be very helpful.
A big problem with
lead-free (aka Pb-Free) solder is that the higher the tin content, the more likely
the growth of "tin whiskers."
This phenomenon where tiny tendrils grow out of the solder is still not fully understood.
The problem is that short circuits can be established between adjacent conductors,
and within a high density connector or a fine-pitch IC package. Some military and
space-based platforms ban the use of Pb-Free solders for that reason.
- How to Solder Various Metals: A handy set of tutorials from the Kester solder people.
- Database for Solder Properties with Emphasis on New Lead-Free Solders
In the chart below, any solder compound that does not have a "Pb" component is lead-free.
| Solder Alloy | Melting Point (°C) | Melting Point (°F) |
| 5Sn-95Pb | 307 | 585 |
| 0.5Sn-92.5Pb-2.5Ag | 280 | 536 |
| Sn/5Sb | 243 | 469 |
| 100Sn3 | 232 | 450 |
| 99.3Sn-0.7Cu | 227 | 440 |
| 96.5Sn-3.5Ag | 221 | 430 |
| Sn/3.0Ag/0.5Cu | 219 | 426 |
| Sn/3.8Ag/1.0Cu | 217 | 423 |
| Sn/3.5Ag/1.0Cu/3Bi | 213 | 415 |
| 50In-50Pb | 209 | 402 |
| 45Sn-55Pb | 204 | 400 |
| 55Sn-45Pb | 193 | 379 |
| 60Sn-40Pb | 186 | 368 |
| 63Sn-37Pb | 183 | 361 |
| 62Sn-36Pb-2Ag | 179 | 354 |
| 97In-3Ag | 143 | 289 |
| Sn/57Bi | 139 | 282 |
| 52In-48Sn | 118 | 244 |
1: Reduction of Hazardous Substances
2: National Institute of Standards and Technology
3: Pure tin
Copyright: 1996 - 2026 |
About RF Cafe RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived... |
Copyright 1996 - 2026 All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledge My Hobby Website: My Daughter's Website: |
