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Alloys commonly used for electrical soldering are 60/40 Sn-Pb, which melts at 188 °C (370 °F), [9] and 63/37 Sn-Pb used principally in electrical/electronic work. The latter mixture is a eutectic alloy of these metals, which: has the lowest melting point (183 °C or 361 °F) of all the tin-lead alloys; and
Used as a cheaper alternative of Pb 60 Sn 40 for wiping and sweating joints. [52] Pb 60 Sn 40: 183: 238 [11] 247 [16] Pb: No: Sn40, UNS L54915. For soldering of brass and car radiators. [54] For bulk soldering, and where wider melting point range is desired. For joining cables. For wiping and joining lead pipes. For repairs of radiators and ...
In electronics assembly, the eutectic alloy with 63% tin and 37% lead (or 60/40, which is almost identical in melting point) has been the alloy of choice. Other alloys are used for plumbing, mechanical assembly, and other applications.
BrazeTec 60/40. For brazing zinc-coated tubes. Similar to CU 303. 60: ... Also classified as a solder. Lowest melting point alloy with low vapor pressure. 80: 20: Au ...
One important difference is that Pb-free soldering requires higher temperatures and increased process control to achieve the same results as that of the tin-lead method. The melting point of SAC alloys is 217–220 °C, or about 34 °C higher than the melting point of the eutectic tin-lead (63/37) alloy.
Fusible alloys are typically made from low melting metals. There are 14 low melting metallic elements that are stable for practical handling. These are in 2 distinct groups: The 5 alkali metals have 1 s electron and melt between +181 (Li) and +28 (Cs) Celsius; The 9 poor metals have 10 d electrons and from none (Zn, Cd, Hg) to three (Bi) p electrons, they melt between -38 (Hg) and +419 (Zn ...
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This latter combination is strong, has a low melting range, and melts and sets quickly (i.e., no 'plastic' range between the solid and molten states like the older 60% tin / 40% lead alloy). Higher tin compositions give the solder higher corrosion resistances, but raise the melting point.
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