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ASTM 321

ASTM 321

ASTM 321 stainless steel performance is very good,here is ASTM 321 application and Performance.

ASTM 321 austenitic stainless steel in the atmosphere has good corrosion resistance, is widely used in petrochemical, electricity, bridges and automotive industries. But stainless steel "stainless" is not absolute, because of the special service environment, stainless steel will corrode. The solution concentration, pH, temperature and other factors, the corrosion resistance of stainless steel will have a greater impact. For example, at 450 ~ 850 ℃ temperature range of sensitizing long-term use, of stainless steel to intergranular corrosion occurs. The mechanism is a C, Cr and grain boundaries, forming Cr23C6 and precipitate at the grain boundaries of the Cr content is reduced, which is called the "chromium depletion." Of Cr element is intergranular corrosion inhibiting one of the key elements, when the grain boundary Cr content is below 12%, the probability of occurrence of intergranular corrosion becomes large.

Austenitic stainless steel equivalent to domestic grades 0Cr18Ni10Ti, ASTM 321 stainless steel is Ni-Cr-Mo austenitic stainless steel, its performance is very similar to the ASTM 304, but due to the addition of titanium, it has a better resistance to grain boundary resistance and high temperature strength. The addition of titanium to make it effective control of the formation of chromium carbide.

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