BS 3338-7 standard is a part of the BS 3338 series that discusses the determination of silver in solders using the volumetric ammonium thiocyanate method for the sampling and analysis of tin and tin alloys. Tin is alloyed with lead to produce solders with melting points lower than those of either tin or lead. Small amounts of various metals, notably antimony and silver, are added to tin-lead solders to increase their strength.
BS 3338-7 on tin alloys applies to:
Silver soldering, also known as 'hard' soldering or silver brazing, is a process in which two or more parts are joined by melting and flowing a filler metal into the joint. The volumetric method is commonly used to determine the unknown concentration of a known reactant. Volumetric analysis is often referred to as titration, a laboratory technique in which one substance of known concentration and volume is used to react with another substance of unknown concentration.
BS 3338-7 provides you with the principle in which the silver is determined volumetrically with ammonium thiocyanate. This method is recommended for silver-containing ranges up to 3.0 per cent silver. This helps you in the sampling and analysis of tin and tin alloys.
BS 3338-7 exemplifies the silver in solders using the volumetric: ammonium thiocyanate method for the analysis of tin and tin alloys.