How to solder stainless steel with soldering iron

How to solder iron with soldering iron!
How to solder stainless steel with soldering iron！

Metals such as stainless steel and iron cannot usually be soldered with a soldering iron, nor can they be soldered with a common flux.
Today I share with you a flux suitable for soldering stainless steel, galvanized sheet, nickel, copper, iron and other metals.
It's cheap, about $ 1, you can find the link below.
Apply this flux to the solder joint, and you can use a soldering iron to solder the stainless steel and other metals.
And it can be used to solder 18650 lithium batteries.
But it seems that it cannot be used for soldering aluminum.
Reminder: please use it with caution, it may cause damage to your iron tip.

Stainless steel flux:
https://bit.ly/39liunU
https://bit.ly/33RXkee

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