Which has higher corrosion resistance, duplex steel 1.4517 or 904L stainless steel? What are the specific differences?
Thread Content
Hello everyone, I would like to ask which has better corrosion resistance, dual-phase steel 1.4517 or 904L stainless steel? What are the specific differences between them? Which one is cheaper, and what are its areas of application?
The alloy grade is GX2CrNiMoCuN25-6-3-3; in China it is known as CD4MCu. It is a 3Mo-grade duplex stainless steel； 904L is designated as 1.4539 in German standards; it contains 14.0–18.0% chromium, 24.0–26.0% nickel, and 4.5% molybdenum. The corrosion resistance mechanisms of these two materials are different, so they cannot be compared in a general manner. A specific composition can be specified, and then the corrosion resistance at a certain temperature can be compared~~~