20 1 has high manganese content, bright and dark surface, high manganese content and easy to rust. 20 1 has poor corrosion resistance, but it is hard. 40 1 has better rust resistance and 40 1 has stronger corrosion resistance.

Let's see what soup is better:

1. Casserole: Casserole is a pot that can withstand high temperature. Can withstand long-term stewing. When cooking soup in casserole, you can stew it slowly to make the soup more authentic and it is not easy to lose the original nutrition of the soup. Casseroles are better sealed, which can make food taste better and keep warm.

2. Pot: The pot is fired at high temperature, with good air permeability, which can transfer heat to the internal ingredients in a balanced and lasting way, making the soup taste more mellow, and the heat dissipation is slow and the heat preservation effect is good.

3. Pressure cooker: Pressure cooker is suitable for quick stewing soup, which can cook food well in a short time and is not easy to destroy the nutrients of food.

4. Braised pot: Braised pot is a little different from other pots, with an inner pot and an outer pot. The inner pot is used for cooking ingredients and the outer pot is used for stewing meat, so it is easy to stew meat, and because there is no steam during stewing, the nutrition of food can be preserved.

5. stainless steel pot: The soup cooked in stainless steel pot is relatively light, not as rich as the soup cooked in casserole, but it has a large capacity and is more resistant to cooking, but it takes a long time to cook.