how does solder differ from tin and lead?

Answer 1

High tin content solder melts at a higher temperature due to the two metals having higher individual melting points

See http://www.efunda.com/materials/solders/tin_lead.cfm for other properties

Answer 2

Solder is an amalgam (mixture) of lead and tin ( or other low temperature metals) mixed in various amounts according to the end use, the mixture of metal has better characteristics than the metals have separately and can contain a core of flux (rosin for electrical, acid for plumbing and other metals) to clean and protect the metals until the metal has cooled to prevent oxidation. Recently the lead has been mandated to be replaced in most solders to reduce the health hazard. An example of an old mixture for solder was 60/40 (lead / tin) for general use, but there are others, one was made for stained glass work that was like 63/37 that had a very slight EUTECTIC (pasty) state and cooled much smoother than the common solder.

Answer 3

Solder is an amalgam of tin and lead. The proportions vary according to the melting point required (low for electrical work, higher for plumbing). Sometimes silver is used instead of or with tin, together with lead, to improve the electrical properties of the joint.

Answer 4

Drill rod solder solder contains lead inside being able to use solder melting point comes down , flowability improves, solder easier to suck six-zone-pass in gap drill rod material , guard against emptiness solder. But metal lead bad for person , has contaminating to the environment, the drill rod expects that formula eliminates lead inside in course of step by step muchly with now.Some occasion is put into use but containing lead drill rod material , may be that the new
drill rod expects that the technology has no way to have substituted , to have given
therefore exempting a clause a grace period for the time being. Drill rod solder high
temperature approximately 450 centigrade. That the science field speaks more is body metal
reaction but be able to be used drill rod material and base to be soldered , the
temperature the part is fused shouts high temperature

Answer 5

Solder has an acid core that causes the tin in it to melt when exposed to heat.

Answer 6

A solder is a fusible metal alloy, with a melting point or melting range below 450 °C (840 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering.

In electronics, solders are usually 60% tin and 40% lead by mass in order to produce a near-eutectic mixture (lowest melting point — below 190 °C [374 °F]). These are commonly designated Sn60/Pb40.

In plumbing, a higher proportion of lead was used. This had the advantage of making the alloy solidify more slowly, so that it could be wiped over the joint to ensure watertightness. Although lead water pipes were displaced by copper when it was realized that the lead was poisonous, lead solder was still used until the 1980s because it was thought that the amount of lead that could leach into water from the solder was negligible. Since even small amounts of lead have been found detrimental to health, lead in plumbing solder was replaced by copper or antimony, with silver often added, and the proportion of tin was increased.

As used for brazing, is generally a copper/zinc or copper/silver alloy, and melts at higher temperatures. Eutectic solder has the lowest melting point for solders, which is 360 °C.

In silversmithing or jewelry making, special hard solders are used that will pass assay. They contain a high proportion of the metal being soldered and lead is not used in these alloys. These solders also come in a variety of hardnesses, known as 'enamelling', 'hard', 'medium' and 'easy'. Enamelling solder has a high melting point, close to that of the material itself, to prevent the joint desoldering during firing in the enamelling process. The remaining solder types are used in decreasing order of hardness during the process of making an item, to prevent a previously soldered seam or joint desoldering while soldering a new joint. Easy solder is also often used for repair work for the same reason. Flux or rouge is also used to prevent joints desoldering.

Solder often comes pre-mixed with, or is used with, flux, a reducing agent designed to help remove impurities (specifically oxidised metals) from the points of contact to improve the electrical connection. For convenience, solder is often manufactured as a hollow tube and filled with flux. Most cold solder is soft enough to be rolled and packaged as a coil making for a convenient and compact solder/flux package. The two principal types of flux are acid flux, used for metal mending, and rosin flux, used in electronics, where the corrosiveness of the vapours that arise when acid flux is heated could damage components. Due to concerns over atmospheric pollution and hazardous waste disposal, the electronics industry has been gradually shifting from rosin flux to water-soluble flux, which can be removed with deionised water and detergent, instead of hydrocarbon solvents.

Tin is a chemical element in the periodic table that has the symbol Sn (Latin: stannum) and atomic number 50. This silvery, malleable poor metal that is not easily oxidized in air and resists corrosion, is found in many alloys and is used to coat other metals to prevent corrosion. It has a melting point of 505.08 K (231.93 °C, 449.47 °F)

Lead is a chemical element in the periodic table that has the symbol Pb (Latin: plumbum) and atomic number 82. A soft, heavy, toxic and malleable poor metal, lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air. It has a melting point of 600.61K (327.46 °C, 621.43 °F)

Answer 7

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