What is the method for determining the tin content of solder rods?

Recently, some customers have asked how to know the content of solder rods. Solder rods are classified into two major categories according to environmental protection standards: lead-free solder rods and leaded solder rods.Lead-free tin barThe commonly used alloy components in China mainly include Sn99.3 Cu0.7Lead-tin strips are classified into various types based on the different ratios of tin content, such as6337,6040Wait, what is the method for determining the tin content of solder rods? Let's take a look together with the editor of JJY Solder Paste Factory

I. Visual inspection: Visual inspection. The incoming materials should be in good packaging without damage and have clear labels. The tin content of the tin strip should be clearly marked on the packaging. If it is lead-free tin bar, there should be a "lead-free" label on the packaging. The surface must not have oil stains, water stains or other dirt. Dust caused by transported materials and capable of being blown away by air is acceptable.

Second, visual inspection: The tin bars should be smooth and lustrous. There is no oxidation or blackening phenomenon.

Iii. Dimensional Inspection: The tin strip measured with a caliper should meet the requirements.

Iv. Test: Adjust the temperature of the constant-temperature soldering iron to the specified temperature with a tin strip (lead-containing tin strip:245±10℃Lead-free tin bar270±10℃When the constant-temperature soldering iron reaches the specified temperature, the tin strip should be able to melt, and no large amount of smoke should be produced when the tin strip melts. Test welding. The weld points should be smooth and shiny. There is no phenomenon of false welding or false welding.

The above is a lecture for everyone on how to determine the amount of solder. If you still have any questions, you are welcome to consult Shenzhen JJY Industrial Technology Co., LTD. Let's learn and grow together!