Ferritic Stainless Steel Chemical Composition

Ferritic stainless steel chemical composition

Steel containing 11% to 14% chromium is called low chromium ferritic stainless steel. Some of them add aluminum elements, and common brands are 00Cr12 and 0Cr13Al. at present, There are few varieties of low-chromium ferritic stainless steel in my country's standards, and they are mainly used in the production of bars and plates.

Steel with a chromium content greater than 19% to 30% is called high-chromium ferritic stainless steel. Some also add alloying elements such as molybdenum and nitrogen. Some plates also add titanium, niobium, etc. element. High-chromium ferritic stainless steel is also widely used in the production of bars, forgings, plates and castings. Common high chromium ferritic stainless steel grades include 00Cr27Mo, 00Cr30Mo2, ZGCr28, etc. Among them, 00Cr27Mo and 00Cr30Mo2 must be strictly controlled because their carbon content is less than 0.01%. The nitrogen content, silicon, manganese, sulfur, phosphorus (P), etc. are lower than those of medium chromium and low chromium ferritic stainless steel, so it is also called high-purity high-chromium ferritic stainless steel.

The structure of ferritic stainless steel is ferrite, which determines that its mechanical properties are characterized by low strength and a certain degree of plasticity and toughness. Chromium content The amount mainly has a greater impact on the toughness of steel. Ferritic stainless steel cannot use heat treatment to adjust its mechanical properties, so it is subject to certain restrictions in use. limits.