How to distinguish between 304 stainless steel and 201 stainless steel

I. Stainless steel 201 304 difference

201 is high in manganese, the surface is very bright with dark bright, high manganese is easy to rust. 304 contains more chromium, the surface shows a matte, not rust, the two put together there is a comparison. The most important thing is the corrosion resistance is different, 201 corrosion resistance is very poor, so the price is much cheaper. And because 201 contains low nickel, so the price is lower than 304, so the corrosion resistance is not as good as 304.

Simply put, 304 stainless steel won't rust, 201 stainless steel will rus

2.201 Hazards of stainless steel

201 stainless steel because of corrosive poor, so generally used in the outer layer, but some bad businessmen because of cheap used in the inner layer of the insulation cup, made of 201 stainless steel insulation cup life is extremely short, often 1-2 years will be corroded by the water, which leaves the user with a security risk!

Here's a simple way to teach you how to identify these two materials:

·With stainless steel pickling paste were applied to 2 kinds of stainless steel plate. 2 minutes later, see the stainless steel colour change at the application. Colour blackening for 201, white or not change colour for 304

·Grinding machine with a grinding wheel gently sanding two kinds of plate, sanding 201 plate sparks longer, thicker, more, and vice versa, 304 plate sparks shorter, finer, less. Sanding force must be light, and 2 kinds of sanding force consistent, easy to distinguish.

·Stainless steel water tank used 304 and 201 stainless steel, the surface is usually matt. So we look through the naked eye, hand touch the way to identify. The naked eye to see 304 stainless steel has a very good glossy shiny, hand touch is very smooth; 201 stainless steel is dark in colour, no luster, touch has a relatively rough not smooth feeling. In addition, the hand will be wet with water, respectively, touch 2 kinds of stainless steel plate, after touching the water stains on the 304 plate handprints are relatively easy to erase, 201 is not easy to erase.

These are the tips to identify 304 and 201 stainless steel, we hope every consumer can buy their own satisfactory insulation cup, if you don't know how to choose insulation cup, you can buy from our website!