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Duplex steels also have higher strength. For example, a Type 304 stainless steel has a 0.2% proof strength in the region of 280 MPa (41 ksi), a 22%Cr duplex stainless steel a minimum 0.2% proof strength of some 450 MPa (65 ksi) and a superduplex grade a minimum of 550 MPa (80 ksi). [6]
Zeron 100 Super Duplex was born from a research project undertaken by Dr Cecil Roscoe at the University of Manchester, England. Tasked by his then employer – Mather+Platt – with studying the effect of various alloying additions on the mechanical properties and corrosion resistance of Zeron 25, he concluded that an optimum corrosion performance could be obtained from a duplex stainless ...
SAF 2507, is a Alleima-owned trademark (Formerly Sandvik Materials Technology) for a 25Cr duplex (ferritic-austenitic) stainless steel.The nominal chemical composition of SAF 2507 is 25% chromium, 7% nickel, 4% molybdenum and other alloying elements such as nitrogen and manganese. [1]
SAF 2205, is a Alleima-owned trademark (Formerly Sandvik Materials Technology) for a 22Cr duplex (ferritic-austenitic) stainless steel. SAF derives from S andvik A ustenite F errite. The nominal chemical composition of SAF 2205 is 22% chromium , 5% nickel , 3.2% molybdenum and other alloying elements such as nitrogen and manganese . [ 1 ]
Duplex grades are usually divided into three sub-groups based on their corrosion resistance: lean duplex, standard duplex, and super duplex. The properties of duplex stainless steels are achieved with an overall lower alloy content than similar-performing super-austenitic grades, making their use cost-effective for many applications.
AL-6XN (UNS designation N08367) is a type of weldable stainless steel that consist of an alloy of nickel (24%), chromium (22%) and molybdenum (6.3%) with other trace elements such as nitrogen. The high nickel and molybdenum contents of the AL-6XN alloy give it good resistance to chloride stress- corrosion cracking.
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