The harm of various elements to the structure of ASTM 403 stainless steel round bar

The effects of various elements on the structure of ASTM 403 stainless steel round bar, based on their commonality, are generally divided into two categories: one is the elements that produce or stabilize austenite, they are carbon, nickel, manganese , nitrogen, copper, with carbon and nitrogen having the greatest effect; the other type is the elements that produce ferrite, they are chromium, tungsten, molybdenum, strontium, silicon, titanium, vanadium, aluminum, etc. This type of elements produces iron If the effect of the element is compared with chromium, the effect of other elements is greater than that of chromium.

When these two elements are compatible in stainless steel, the structure of stainless steel is the result of their mutual influence. If the function of elements stabilizing austenite is at a critical level, the structure of stainless steel will be dominated by austenite, with very little or even no ferrite; if their function level cannot maintain the austenite of the steel to If the indoor temperature is high, this unstable austenite will change to austenite when cooled, and the structure of the steel will be austenite; if the function of the element that produces ferrite becomes critical, 304f stainless steel The structure of bar steel is dominated by ferrite. In addition to the processing technology factors, the performance of stainless steel mainly lies in the composition of its internal structure, and the structure of stainless steel is the total number of various aluminum alloy elements in the steel.

Therefore, the performance of stainless steel, in the final analysis ASTM 403 stainless steel round bar, is mainly determined by aluminum alloy elements. Stainless steel with only chromium elements is usually called "stainless steel 201", and industrial production calls it "chromium stainless steel".