thermal+effects+on+materials

= = =effects of thermal processes on the properties of materials=

=soldering= media type="custom" key="10282917" Soldering is commonly used in electrical, electronic and plumbing work. Joint strength is typically 50 - 60 MPa. The solder is composed of lead-tin alloys or the cheaper lead-tin-antimony alloys (not to be used on zinc or galvanised metal). Fluxes are used to clean the joint and assist in the process. The constituent ratios are tin (Sn) 12% - 62%, lead (Pb) 38% - 80% and sometimes Antimony (Sb) 1.5% - 8%. Due to the harmful effects of lead on health, lead free solders are now available.

Watch the following video on soldering []

=brazing= media type="custom" key="10282925" Brazing is stronger than soldering and can withstand higher working temperatures than soldering (MPa) || Up to 2% Tin (Sn) Balance Zinc (Zn) || 860 - 890 || Iron and steel || 390 - 460 || 14% - 40% Copper (Cu) 10% - 20% Zinc (Zn) [and sometimes 18% - 20% Cadmium (Cd)] || 700 - 770 [620 - 640] || Brass, Copper, stainless steels and nickel alloys || 340 - 450 || Balance Copper (Cu) With or without 13% - 15% Silver (Ag) || 625 - 800 || Forms brittle joint. Not to be used on Iron and Steel and Nickel based alloys ||  ||
 * Group || Constituents || Melting Point (Celsius) || Uses || Strength
 * Brazing Brasses || 50% - 60% Copper (Cu)
 * Silver Solder || 50% - 60% Silver (Ag)
 * Copper Phosphorous alloy (self fluxing) || 45% - 7% Phosphorous (P)
 * Aluminium Brazing |||||||| Uses special aluminium-silicon alloy ||

Watch the following video on brazing []

=welding= media type="custom" key="10282931" To get an excellent overview of the main types of welding, stick, TIG and MIG watch the following video []

For all your welding tips and tricks go to []

How much do you remember? Complete the following quiz

=quiz - thermal effects=

The next topic is =fasteners=