While all the three processes viz. welding, soldering, and brazing can be used for joining metals, they differ from each other in many different aspects. These aspects include the job process, heat treatment, preheating requirements, mechanical property related changes, temperature requirements, and strength among others. Below are some of the differences between the three processes and their description. The information will help you understand the three processes better and help you choose the best one for a given and specific scenario.
The welding process can only be conducted between two similar metals or thermoplastics. For instance, steel cannot be joined and welded with copper through welding. High temperatures are involved while a filler metal may also be used. The right amount of heat application will ensure that the bond is strong but over/under heating may cause a weak joint. The different kinds of welding processes available today include the laser, electronic, beam, metal, inert gas, and stir friction.
●Welding provides for strongest joints that can bear a good amount of loads. The joint strength can even be greater than the strength of the individual metals.
●Temperatures of up to 3800-degree centigrade may be attained during the process.
●Pieces are heated to their respective melting points before then can bear joints.
●Heating of the metals and their subsequent cooling may change the mechanical properties of the base metals involved.
●Only skilled and expert professionals can complete the job and the cost of heat is noticeable.
●The undesirable and unwanted effects of welding may be reduced by proper heat treatment.
●No preheating of individual metal pieces is required.
When compared to brazing and welding, soldering is carried out at relatively low temperatures, and a soldering machine is meant to deal with delicate tasks. The fillers used in the soldering process may melt at a temperature of 450-degree centigrade or below. Many different kinds of metals including iron, brass, copper, silver or gold may be soldered and joint. While earlier the solder materials were made only of lead, the lead-free soldering alternatives are today present and are being preferred due to environmental and health considerations. Like other joining processes including brazing and welding, soldering also uses flux. Metal surfaces can be cleaned by using it, which provides for easier and faster flowing of solder over the pieces.
●Soldering provides for weak joints, which cannot bear loads. These joints are often meant to provide for electrical contacts.
●The temperature and heating requirement may not be beyond 450-degree centigrade in most cases.
●The workpieces are not required to be heated individually.
●The mechanical properties of the metals joined using soldering remains intact even after joining.
●Low skill and cost involvement.
●There is no requirement of heat treatment as well
●Preheating improves the quality of joints.
Soldering machine price is quite low online, and the machine is shipped directly to any address you desire.
Brazing can be used to join the similar and even the different metals including gold, copper, silver, aluminium, and nickel. An alloy filler is melted for bonding the different pieces. Use of flux promotes cleaning so that the filler can flow over and around the metal parts easily. Joints created through brazing has greater strength than soldering joint, but lesser than the welding joints.
●The brazing process may involve a temperature of up to 600-degree centigrade
●The brazing joints may bear loads but to a given extent only.
●While brazing involves heating of work pieces, the temperature is below the melting point of the metals involved.
●The mechanical property of the metal may undergo a change but to a negligible extent only.
●Heat treatment is not required.
●As brazing is carried out at reflectively lower temperature, preheating is beneficial.
While all the 3 processes are useful for joining metals, they have their own benefits. Choose the right option and use the best tools to attain high-quality benchmarks and reliability.