What is the difference between stainless steel and stainless iron? How to tell?

Stainless steel refers to steel that is resistant to corrosion by weak media such as atmosphere, steam and water, while acid-resistant steel refers to steel that is resistant to chemical corrosive media such as acid, alkali, and salt. The difference between stainless iron and stainless steel is the level of nickel-containing composition. How to distinguish between stainless steel and stainless iron?

Stainless iron is a kind of stainless steel. The models are: 409 410 430 444. It belongs to martensitic and ferritic stainless steels. It will be magnetic when magnets are used. Austenitic stainless steels include 201 202 304 321 316L and so on.

Stainless steel (also known as stainless acid-resistant steel) refers to steel that is resistant to corrosion by chemical media such as the atmosphere or acid. Stainless steel is not rust-free, but the corrosion behavior in different media is different.

Commonly known as stainless iron refers to ferritic stainless steel and martensitic stainless steel. It is used to distinguish it from the most common austenitic stainless steel with good rust resistance.

304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm³, also known as 18/8 stainless steel in the industry. High temperature resistance of 800 ℃, has the characteristics of good processing performance and high toughness, and is widely used in industry, furniture decoration industry and food and medical industry.