Don’t believe the marks on stainless steel products if you can’t tell with the naked eye. Many 201 are printed with 304. If you can use a magnet to distinguish 201 and 304, the magnet can be made into a thermos cup. After cold processing, 201 is magnetic after cold processing, which is weaker than ordinary steel. But it is also obvious that the suction force 304 is not magnetic, or very.
Whether the thermos cup can be tested with salt water is 304304. It is a versatile stainless steel material with strong anti-rust performance and high temperature resistance up to 1000-1200 degrees. It has excellent stainless corrosion resistance and better resistance to intergranular corrosion. The mechanism is alloy The elements form a dense oxide film, which isolates oxygen contact and prevents continued oxidation, which is beautiful.
Edible salt water is corrosive to a certain extent. If it is a 202 stainless steel pipe, it will rust within 24 hours if it is placed in salt water. However, the qualified 304 stainless steel does not contain iron, so it will not rust But in a short period of time, there is no star change.
1. Simple identification method of thermal insulation performance of stainless steel thermos cup. The lower part of the cup body heats up, indicating that the product has lost its vacuum and cannot achieve a good heat preservation effect.
Stainless steel water cups cannot be tested for 304 material with salt water. Although chloride ions have a corrosive effect on stainless steel 304, it is more difficult to rely on salt water, and visual inspection is very difficult.
Post time: Mar-07-2023