1 Molten sulfur has a dark red color above 200 Â°C. Different allotropes have different densities of about 2 g/cm. Stable allotropes are excellent electrical insulators.  Sulfur burns with a blue flame, forming sulfur dioxide with suffocating odor.
1 Clean stainless steel at least once a week. 2  Always apply stainless steel cleaner/polish with a nonabrasive cloth or sponge, working with, not across, the grain. 3  Do not use steel wool, wire brushes or abrasive sponge pads. 4  Use only non-scratch cleaning pads. 5  Cleaners containing chloride (bleach) are not recommended.
You need to prepare the stainless steel carefully so it's completely clean. Sand it if you can, or use a stainless steel wire brush, but be thorough. You also need to use a special flux meant for stainless steel. Finally, you probably need to use a torch instead of a soldering iron to generate enough heat. Written Jun 27, 2015.