304（18-8）
This kind of stainless steel is not easy to rust, and it is a must-use material for the national pressure cooker standard.
316（18-10）
It belongs to medical stainless steel material, with extremely strong corrosion resistance, and there is no metal ion precipitation at all, and it is not easy to rust, of course, the price is relatively more expensive.
So, there are some tips:
1) Look at the logo
Most of the stainless steel kitchenware is stamped on the surface such as 13-0, 18-8 and so on. The number in front of the short line indicates the chromium content of the product, and the latter number indicates the nickel content of the product. Attention please, you must buy the nickel-containing products! They are the true stainless steel utensils.
2) The quality
Good stainless steel kitchenware has a high density and will be slightly heavier.
3) Choose regular
Don’t try to buy the bargains or spread goods as much as possible. You best go to the purchase in the regular channel.