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    How to use lead free solder wire in different materials?


    How to use lead free solder wire correctly?

    Stainless steel is an indispensable material to make necessary products for daily life. That's why the need to connect. Stainless steel is an indispensable material to make necessary lead free solder wire for daily life. That's why the need to connect them to create products is more and more. How to use a stainless steel solder wire correctly and effectively, let's find out right away.

    lead free solder wire

    Soldering lead free solder wire with a stick solder wire

    Before working, it is necessary to determine how thick the stainless steel material needs to be.  The corresponding thickness is different, it is necessary to have a soldering wire with the appropriate radius.

    Furthermore, usually on genuine products, the manufacturer will provide specifications that you need to follow. It is to ensure the machine works properly and the soldering quality is guaranteed. The machine uses 1-phase or 3-phase voltage, adjusts the appropriate soldering current.

    For those who are making stick lead free solder wire for the first time, they should adjust the soldering current to the lowest level.

    How to clean the solder material?

    Clean the material to clean, use an iron brush to remove the rusty outer layer or a specialized cleaning tool. Keep the working area clean, airy, and free of obstructions.

    Furthermore, choose a suitable soldering position. Moreover, it should have enough light, not by the soldering hand. The wind direction does not push against the person to avoid sparks. The quality of stainless steel welds depends on 3 main factors. These are:

    • soldering wire size
    • Moreover, soldering current strength and
    • soldering technique



    The initial position of the soldering wire should be 90 degrees perpendicular to the surface of the object to weld. When working with a stick lead free solder wire e to weld stainless steel, it is intermittent soldering and continuous motion.  If soldering continuously, the weld will easily melt or the welds will not stick together.

    How to solder stainless steel with a stick solder?

    Soldering stainless steel with a stick solder wire is not too difficult, but to work safely and effectively, you should note the following:

    • The distance between the eye and the soldering wire is not too close
    • Do not open your eyes wide when the soldering iron is hot, because they will affect your corneas
    • After the soldering is complete, all power must be turned off
    • Put the lead free solder wire in a safe place and do not let anyone near until the tools have cooled down
    • Clean soldering equipment, polish welds to ensure aesthetics and avoid oxidation

    What is the use of steam soldering wire?

    In order for the soldering process to take place most smoothly and accurately, you should buy yourself a steam solder wire, so the soldering operations will be the most accurate, the welds will achieve high aesthetics and best adhesive.

    Soldering stainless steel by mig solder wire

    Steps to perform stainless steel soldering with mig solder wire are below.

    First, there will be a toggle switch: To the left is the gas soldering mode, and to the right is the rod soldering.

    Secondly, there are 2 knobs: The left knob is to adjust the current and the right knob is to adjust the time of the gas interrupt relay.

    Near the tripod, there will be sockets for soldering rods, gas wires, electrical switch wires and common ground wires for needle and lead free solder wire.

    Thirdly, Soldering needle: For thin stainless steel soldering, you use a small sharp soldering needle so that the electricity can focus on one place, when soldering the weld will be small and beautiful.

    Soldering stainless steel by lead free solder wire

    For stainless steel welds with a thickness of over 7mm or less than 1.5mm, using a LEAD FREE solder wire is the most effective. When connecting thin-structured welds with machines with pulse function, the heat affected area will be limited, causing less distortion, and better product shaping

    Moreover, especially now on the market there are lead free / Rod solder wires that integrate both lead free solder wire and rod modes. This will better support when workers need to weld materials of different thicknesses.

    Common modes in lead free solder wires

    When working in 2T mode, when you press the trigger, the arc will appear and turn off when the trigger releases. With this mode, you need to hold the trigger during the soldering process. This method is suitable for:

    • making simple welds
    • soldering, and
    • soldering relatively thick parts

    And it does not require high precision and sophistication.

    In 2T soldering mode, you can apply upslope, downslope method to solder. When the switch is turned on, the gas will be supplied first and then switched to the starting flow. The lead free solder wire current will gradually increase from the starting current to the main soldering current.

    This time you can set from 1 to 10 seconds. The main soldering current will slowly decrease to the downslope when the switch releases. Finish soldering and continue to supply shielding gas to meet the requirements of the weld.

    Lead free solder wire 200P Merkel

    You can use some tricks to adjust the soldering current in 2T soldering mode such as: When you have sold all 1 soldering wire, you take advantage of the time.

    Further after replacing the soldering iron, you slowly increase the main soldering current of lead free solder wire again. This is a simple way to increase or decrease the soldering current during stainless steel soldering.
    lead free solder wire 2021

    What is soldering mode 4T?

    Gas supplies and arc appears as soon as you turn on the switch. However the soldering current set to low. The soldering current increases to the main soldering current when you release the switch for the 1st time, then you can start soldering.

    In addition to pause soldering, press the switch a second time, the soldering current will decrease from the main soldering current to the ending soldering current. To end the arc, release the switch for the second time.

    Method of soldering stainless steel under drug layer

    When soldering stainless steel with a lead free solder wire under the drug layer, it will ensure a more stable weld in terms of metal composition and properties. In addition, it also avoids the phenomenon of metal splashing; the weld will be better protected, easier to shape.

    Moreover, the method of soldering stainless steel by automatic solder wire under the drug layer applies to material sheets with a thickness of 3 - 50mm with a flat soldering position. Usually this method is applied when the workload is large and requires high labor productivity.

    Note that after soldering, the soldering slag must be cleaned to avoid the risk of corrosion of the soldering connection.

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