What is the difference between 316 vs 410 stainless ste…
Super duplex stainless steel(SDSS) refers to the duplex stainless steel with prEN > 40, 25% Cr and high molybdenum (> 3.5%) and high nitrogen (0.22% ～ 0.30%). The main brands are UNS S32550 (ur52n +), S32750 (SAF 2507) and S32760 (zeron 100). They were developed by cli in France, Sandvik in Sweden and mater + Platt in England. The composition of these three steels is similar.
Duplex stainless steel properties were analyzed from various tests.
Duplex stainless steel is a kind of stainless steel composed of ferrite and austenite, This alloy applications in various industries is introduced
Adding micro-alloy elements Ti, Nb, and V in a CA6NM martensitic stainless steel tube is usually expected to form a nitrogen compound with C and N.
Si is a strong ferrite stabilizing element in martensitic stainless steel. Si in CA6NM stainless steel can suppress temper embrittlement and the decomposition of retained austenite during tempering.
First of all, as a deoxidizer, we often add Al in CA6NM stainless steel. At the same time, Al is also a ferrite forming element. As a result, its promoting effect on ferrite formation is about 2.5~3 times of that of Cr.
Mn in CA6NM expands the austenite phase zone in the phase diagram. In steel, the stability of Mn to austenite is only below Ni, which can greatly improve the hardenability of steel.
Cu in CA6NM has a weaker effect on the formation of austenite. A small amount of Cu addition can not optimize the martensitic microstructure of martensite.