Differences between the CD4M Cu and URANBS B6 materials
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Question: What is the difference between the two materials, CD4M Cu and URANBS B6? In a fertilizer factory where the medium is phosphoric acid, what are the differences when using these two materials? Please give me some advice!
CD4MCu – resistant to wear and corrosion; it can be used in phosphate chemical industries without any problems. I’ve never seen the second material before: L :L
Thank you to the person above; the second one is UB6, which is also 904L, but I don’t know the difference
I searched on Baidu and found that this material has not been used before; it’s another special type of material I’ve come to know about. Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu, UNS: N08904, EN: 1.4539) is a highly alloyed austenitic stainless steel with a very low carbon content. It exhibits excellent corrosion resistance in dilute sulfuric acid and was designed for use in environments with severe corrosive conditions. It has a high chromium content and sufficient nickel content; the addition of copper endows it with strong acid resistance. It exhibits high resistance to chloride intergranular corrosion and stress corrosion cracking, and is less prone to the formation of corrosion spots and cracks. Its pitting resistance is slightly better than that of other steel grades. It possesses good machinability and weldability, making it suitable for use in pressure vessels