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Solder Alloys - Lead Free Too !
The alloying and tooling possibilities are endless at Williams.
For over 80 years, Williams has been a leader in the fabrication and refining of precious metal alloys, including a variety of low temperature lead free solder solutions. Today, Williams has the most advanced technology available, integrated directly within our manufacturing facilities. Our extensive offering of Alloys are cast and fabricated to meet the exacting standards of various micro electronics applications. Custom Alloys can be formulated and manufactured according to your application temperature.
All of our alloys are available in a variety of shapes and forms, including ribbon, preforms, rod, ring and wire. Custom shapes can also be manufactured using our state-of-the-art design and fabrication equipment.
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Developing a material for your application?
Need process information about a product?
Our engineers can help.
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Note: Lead Free Solder Preforms are highlighted in the chart below.
D = Density |
|
EC = Electrical Conductivity |
TCE = Thermal Coefficient Of Expansion |
TC = Thermal Conductivity |
TS = Tensile Strength |
WAM
Solder |
Nominal
Composition |
Solidus |
Liquidus |
D
(g/cc) |
EC
(% of IACS) |
TC
(W/m
*C) |
TCE
(Micro in/in/C)
(20C)
|
TS
(psi) |
F |
C |
F |
C |
WS118 |
48Sn, 52In |
244 |
118 |
244 |
118 |
7.3 |
11.7 |
34 |
20 |
1720 |
WS143 |
3Ag, 97In |
290 |
143 |
290 |
143 |
7.38 |
4.5 |
73 |
22 |
800 |
WS145 |
58Sn, 42In |
244 |
118 |
293 |
145 |
7.3 |
11.2 |
33 |
31 |
5900 |
WS149 |
5Ag, 15Pb, 80In |
288 |
149 |
300 |
149 |
7.85 |
6.7 |
43 |
28 |
2550 |
WS157 |
100In |
315 |
157 |
315 |
157 |
7.31 |
5.6 |
82 |
24.8 |
575 |
WS174 |
30Pb, 70In |
329 |
165 |
347 |
174 |
8.19 |
8.8 |
38 |
28 |
3450 |
WS179 |
2Ag, 36Pb, 62Sn |
354 |
179 |
354 |
179 |
8.41 |
11.9 |
42 |
27 |
6380 |
WS181 |
37.5Pb, 37.5Sn, 25In |
273 |
134 |
358 |
181 |
8.42 |
7.8 |
23 |
23 |
5260 |
WS183 |
37Pb, 63Sn |
361 |
183 |
361 |
183 |
8.34 |
11.8 |
51 |
25 |
7500 |
WS185 |
40Pb, 60In |
343 |
173 |
358 |
185 |
8.52 |
7 |
29 |
27 |
4150 |
WS186 |
30Pb, 70Sn |
361 |
183 |
367 |
186 |
8.17 |
12.5 |
53 |
27 |
7800 |
WS187 |
2.8Ag, 77.2Sn, 20In |
347 |
175 |
369 |
187 |
7.25 |
9.8 |
54 |
28 |
6800 |
WS188 |
40Pb, 60Sn |
361 |
183 |
376 |
188 |
8.5 |
11.5 |
49 |
21.6 |
7610 |
WS199 |
20Pb, 80Sn |
361 |
183 |
390 |
199 |
7.85 |
13.8 |
59 |
24.5 |
5800 |
WS200 |
45Pb, 55Sn |
361 |
183 |
392 |
200 |
8.68 |
11.2 |
48 |
22.6 |
6800 |
WS205 |
15Pb, 85Sn |
361 |
183 |
401 |
205 |
7.7 |
13.6 |
58 |
22 |
5300 |
WS209 |
50Pb, 50In |
363 |
184 |
410 |
209 |
8.86 |
6 |
22 |
27 |
4670 |
WS212 |
50Pb, 50Sn |
361 |
183 |
414 |
212 |
8.87 |
10.9 |
47 |
23.6 |
6000 |
WS213 |
10Pb, 90Sn |
361 |
183 |
415 |
213 |
7.55 |
13.1 |
56 |
26.5 |
3300 |
WS217 |
10Au, 90Sn |
423 |
217 |
423 |
217 |
7.73 |
10.2 |
28 |
14 |
15000 |
WS217A |
95.5Sn, 3.8Ag, .7Cu |
423 |
217 |
423 |
217 |
7.5 |
13 |
57 |
22 |
7500 |
WS221 |
3.5Ag, 96.5Sn |
430 |
221 |
430 |
221 |
7.36 |
16 |
33 |
30.2 |
5620 |
WS225 |
60Pb, 40In |
401 |
205 |
437 |
225 |
9.3 |
5.2 |
19 |
26 |
5000 |
WS226 |
3.5Ag, 95Sn, 1.5Sb |
424 |
218 |
439 |
226 |
7.37 |
11.9 |
29 |
18 |
7300 |
WS226A |
2.5Ag, 97.5Sn |
430 |
221 |
439 |
226 |
7.34 |
11.2 |
28 |
19.5 |
6200 |
WS232 |
100Sn |
450 |
232 |
450 |
232 |
7.28 |
15.6 |
73 |
23.5 |
1900 |
WS235 |
99Sn, 1Sb |
455 |
235 |
455 |
235 |
7.27 |
12.3 |
29 |
22 |
2620 |
WS238 |
60Pb, 40Sn |
361 |
183 |
460 |
238 |
9.28 |
10.1 |
44 |
24.7 |
5400 |
WS238A |
97Sn, 3Sb |
450 |
232 |
460 |
238 |
9.28 |
12.1 |
28 |
25 |
4080 |
WS240 |
95Sn, 5Sb |
450 |
232 |
464 |
240 |
7.25 |
11.9 |
28 |
27 |
5460 |
WS243 |
63.2Pb, 35Sn, 1.8In |
365 |
185 |
469 |
243 |
9.39 |
9.5 |
41 |
21 |
2900 |
WS257 |
70Pb, 30Sn |
361 |
183 |
495 |
257 |
9.66 |
9.3 |
41 |
25.6 |
5000 |
WS264 |
75Pb, 25In |
464 |
240 |
500 |
264 |
9.97 |
4.6 |
18 |
26 |
5450 |
WS280 |
80Pb, 20Sn |
361 |
183 |
536 |
280 |
10.04 |
8.7 |
37 |
26.5 |
4800 |
WS280A |
81Pb, 19In |
518 |
270 |
536 |
280 |
10.27 |
4.5 |
17 |
27 |
5550 |
WS280B |
80Au, 20Sn |
536 |
280 |
536 |
280 |
14.51 |
7.7 |
57 |
15.9 |
40000 |
WS286 |
86Pb, 8Bi, 4Sn, 1In, 1Ag |
514 |
268 |
547 |
286 |
10.91 |
5.6 |
33 |
22.4 |
5317 |
WS288 |
85Pb, 15Sn |
361 |
183 |
550 |
288 |
10.48 |
8.5 |
37 |
27.2 |
4600 |
WS290 |
2Ag, 88Pb, 10Sn |
513 |
268 |
570 |
290 |
10.75 |
8.5 |
27 |
29.1 |
3260 |
WS292 |
5Ag, 90Pb, 5Sn |
558 |
292 |
558 |
292 |
11 |
7.7 |
26 |
26 |
5100 |
WS295 |
95Pb, 5Sb |
486 |
252 |
563 |
295 |
10.96 |
6.2 |
27 |
27 |
4200 |
WS296 |
2.5Ag, 92.5Pb, 5Sn |
549 |
287 |
565 |
296 |
11.02 |
7.6 |
26 |
24 |
3500 |
WS300 |
2.5Ag, 92.5Pb, 5In |
572 |
300 |
572 |
300 |
11.02 |
5.5 |
25 |
25 |
4560 |
WS302 |
90Pb, 10Sn |
527 |
275 |
576 |
302 |
10.5 |
8.2 |
36 |
27.9 |
4400 |
WS303 |
2.5Ag, 97.5Pb |
577 |
303 |
577 |
303 |
11.33 |
7.5 |
26 |
23 |
5900 |
WS304 |
2.5Ag, 95.5Pb, 2Sn |
570 |
299 |
579 |
304 |
11.2 |
7.6 |
26 |
23 |
3400 |
WS305 |
78Au, 22Sn |
536 |
280 |
581 |
305 |
14.81 |
7.7 |
57 |
15.9 |
40000 |
WS309 |
1.5Ag, 97.5Pb, 1Sn |
588 |
309 |
588 |
309 |
11.28 |
6 |
23 |
30.4 |
4420 |
WS310 |
5Ag, 90Pb, 5In |
554 |
290 |
590 |
310 |
11 |
6.4 |
29 |
24 |
4500 |
WS314 |
95Pb, 5In |
572 |
300 |
597 |
314 |
11.06 |
5.1 |
21 |
29 |
4330 |
WS314A |
95Pb, 5Sn |
590 |
310 |
597 |
314 |
10.8 |
8.1 |
35 |
28.4 |
4000 |
WS327 |
100Pb |
621 |
327 |
621 |
327 |
11.35 |
8.4 |
15 |
29.3 |
2750 |
WS361 |
88Au, 12Ge |
682 |
361 |
682 |
361 |
14.67 |
11.4 |
44 |
13.4 |
26900 |
WS363 |
96.85Au, 3.15Si |
685 |
363 |
685 |
363 |
15.7 |
46.4 |
27 |
12.3 |
37000 |
WS487 |
81.Au, 19In |
909 |
487 |
909 |
487 |
14.72 |
8.4 |
28 |
14.7 |
33700 |
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