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Ni 81.5 Cr 15 B 3.5: Ni–Cr 1055 [1] – NI 109. Eutectic. <1.5% Fe. Good initial penetration. Specialized use in aerospace. Good choice for gap-filling powders. 15: 81.5: 3.5: Ni 62.5 Cr 11.5 Si 3.5 B 2.5 Fe 3.5 C 0.5 W 16: Ni-Cr-W 970/1105 [1] – NI 110. Moderate flow. Use in aerospace. Almost always requires tracing. Gaps 0.1–0.25 mm. 11 ...
Copper content must be maintained between 0.4–0.85%, e.g. by refilling the bath with Sn 96.5 Ag 3.5 alloy (designated e.g. SN 96 Ce). Nitrogen atmosphere can be used to reduce losses by dross formation. Dull, surface shows formation of dendritic tin crystals. Sn 95.6 Ag 3.5 Cu 0.9: 217: Yes: Yes: Determined by NIST to be truly eutectic. Sn 95 ...
Rosin used as flux for soldering A flux pen used for electronics rework Multicore solder containing flux Wire freshly coated with solder, held above molten rosin flux. In metallurgy, a flux is a chemical reducing agent, flowing agent, or purifying agent. Fluxes may have more than one function at a time.
Cu 3 Sn – common on solder-copper interface, forms preferentially when excess of copper is available, more thermally stable than Cu 6 Sn 5, often present when higher-temperature soldering occurred [19] [6] Ni 3 Sn 4 – common on solder-nickel interface [19] [6] FeSn 2 – very slow formation
Decarburizing, AWS type 2, "endothermic generated atmospheres. 70–71% N 2, 5–6% CO 2, 9–10% CO, 14–15% H 2. For copper, silver, copper-phosphorus and copper-zinc filler metals. For brazing copper, brass, nickel alloys, Monel, medium carbon steels. Combusted fuel gas
Example of a copper alloy object: a Neo-Sumerian foundation figure of Gudea, circa 2100 BC, made in the lost-wax cast method, overall: 17.5 x 4.5 x 7.3 cm, probably from modern-day Iraq, now in the Cleveland Museum of Art (Cleveland, Ohio, USA) Copper alloys are metal alloys that have copper as their principal component.
A soldering iron stand keeps the iron away from flammable materials, and often also comes with a cellulose sponge and flux pot for cleaning the tip. Some soldering irons for continuous and professional use come as part of a soldering station, which allows the exact temperature of the tip to be adjusted, kept constant, and sometimes displayed.
Solder fittings are smooth and easily slip onto the end of a tubing section. The joint is then heated using a torch, and the solder is melted into the connection. When the solder cools, it forms a very strong bond that can last for decades. Solder-connected rigid copper is the most popular choice for water supply lines in modern buildings.
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