[1] Zeron 100 with a composition of 25% chromium, 3.6% molybdenum and 0.7% tungsten has good pitting resistance to various chlorides and organics acids.
The ferritic structure and alloy additions, such as nitrogen provide yield strengths that are twice that of 300 series stainless steels.
Zeron 100AFP is an advanced forging grade which has been developed for use in subsea oil and gas applications where good mechanical properties must be preserved at temperatures of about −70 °C.
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 steel with a PREn value of 40, containing low carbon and alloyed with optimum levels of Cr, Ni, Mo, Cu, W and N. This discovery marked the invention and first use of the term 'super duplex' stainless steels.