| Alloy | Composition | Solidus °F |
Liquidus °F |
Shear PSI |
Uses |
|---|---|---|---|---|---|
| TIN | Sn (99.95) | 450 | 450 | ||
| #399 | Sn/5Sb | 450 | 464 | 4583 |   |
| #IA-421 | Sn/3.8Ag/.7Cu(p) | 423 | 423 | 5091 |  |
| #IA-423 | Sn/4.7Ag/1.7Cu | 423 | 423 | 5874 |  |
| #IA-425 | Sn/Ag/Cu(p) | 423 | 423 | |
|
| #460 | Sn/3.5Ag(e) | 430 | 430 | 5408 | |
| #466 | Sn/4Ag | 430 | 444 | | |
| #469 | Sn/5Ag | 430 | 464 | | |
| #495 | Sn/Cu/Ag(p) | 437 | 660 | 4641 | |
| #465 | Sn/Cu/Sb/Ag(p) | 437 | 447 | 5149 | |
| #497 | Sn/Sb/Cu/Ag(p) | 419 | 452 | 5294 | 
|
| #574 | Sn/3Cu | 446 | 619 | 4192 |  |
| #576 | Sn/1.5Cu | 446 | 505 | 3974 | |
| #577 | Sn/2Cu | 446 | 540 | ||
| #579 | Sn/.7Cu (e) | 446 | 446 | 3911 | |
| (e) - eutectic alloy | (p) - proprietary composition | ||||
 | |||||
Johnson's selection of Lead-Free Solders is one of the finest anywhere, offering unique properties that enable the best performance for a given application.
Johnson's #399, 95/5 tin-antimony solder, has been used by plumbers for many years due to its low cost and acceptable performance.
We recommend #497 as stronger and easier to use for sweating joints in potable water (plumbing) systems, water valves, roofing, plus many other production soldering applications. It is available in extruded bar, meter bar (⅜ x ⅜ x 15 inches), micro bar (¼ x ¼ x 15 inches) and wire.
Johnson's #574, and #579 are economical, practical and reliable alloys found within the binary tin-copper family of solders. All are compatible, yet each offers a unique melting range, which is good for handling multiple soldering tasks, much the same way you can use different solders from the lead-tin group.
Silver Bearing Alloys, distinguished by their Silver Content (Ag) from 0.5 to 5.0%, offer high strength and excellent wettability.
Silver Bearing Solders, not to be confused with silver solders (brazing alloys), offer certain physical properties unsurpassed by other lead-free solders. With very few exceptions, they provide superior strength, wettability and corrosion resistance for soldering copper, brass, steel, etc., along with a good bond and color match with most grades of stainless. Johnson's #IA-423, ternary (3-element) tin-silver-copper eutectic alloy, as well as similar alloys such as #IA-421, which contains less silver and copper, and #IA-425, the shiniest solder we've ever seen, (we call it SilverGloTM), provide subtle differences for certain heating methods, or soldering applications, etc.. These alloys, and a few others fall within what is referred to as a "narrow eutectic trough,".
Our most popular solder within the binary (2-element) tin-silver family of solders is Johnson's #460, which is a eutectic alloy that melts at 430 degrees F (221 C). Johnson's #495 has the widest melting range of any silver bearing solder within our standard alloy offerings. Its primary use is for plumbing.
ALL JOHNSON PURE LEAD-FREE SOLDERS CONTAIN LESS THAN 0.05% LEAD, 1/4 THE AMOUNT ALLOWED BY EPA FOR POTABLE WATER SUPPLIES.
All of Johnson Manufacturing solders are for Industrial and commercial applications. We do not sell electronic grade solder
Physical properties of Johnson Standard Alloys, melting temperature, shear strength.