Outokumpu Ultra range products are at home in extremely corrosive environments
A number of impressive grades are included within the Outokumpu Ultra range of grades, a range specifically ear-marked for extremely corrosive applications. The range includes most notably the super austenitic Ultra 254 SMO and Ultra 6XN (UNS N08926/UNS N08367). These two grades boast 6% molybdenum.
“Outokumpu has almost 40 years of experience in producing 6% molybdenum-containing stainless steels,” explains Poul-Erik Arnvig, Vice President Business Development for Outokumpu.
Super austenitics with high strength
The Ultra range also includes Ultra 904L and Ultra 4565, both of which have less than 5% molybdenum content. Super austenitics have generally higher strength than standard grades, and up to almost twice the strength in some cases.
“Ultra 4565 has slightly more corrosion resistance than Ultra 254 SMO, but its strength is significantly higher— almost at a level of 654 SMO,” Arnvig explains. “When the design calls for bending and mechanically forming stainless steel, Ultra 4565 has excellent ductility,” Arnvig adds.
Ultra is suitable for various use in heavy industry
Ultra 254 SMO and Ultra 4565 are specified for a range of energy and processing industries including pulp & paper facilities, offshore topside installations, and flue gas desulphurization (FGD) applications.
“Both thin sheet used for wall paper in FGD scrubbers as well as solid plate help ensure long-lasting functionality over time,” reports Arnvig. “This is particularly important in the China market where there is a growing need for FGDs,” stresses Arnvig. Ultra 254 SMO is also used in the repair and replacement of FGDs.
Facilities in close proximity to sea and seawater environments are another classic application for 6-molys. Other applications for them include water handling systems where excessive microbiological activities are common.
“When water from rivers and streams are used in the processing at a plant, these grades may be specified over 316 for better corrosion resistance to these ‘hungry’ microbes,” concludes Arnvig.
Super austenitics with high strength
The Ultra range also includes Ultra 904L and Ultra 4565, both of which have less than 5% molybdenum content. Super austenitics have generally higher strength than standard grades, and up to almost twice the strength in some cases.
“Ultra 4565 has slightly more corrosion resistance than Ultra 254 SMO, but its strength is significantly higher— almost at a level of 654 SMO,” Arnvig explains. “When the design calls for bending and mechanically forming stainless steel, Ultra 4565 has excellent ductility,” Arnvig adds.
Ultra is suitable for various use in heavy industry
Ultra 254 SMO and Ultra 4565 are specified for a range of energy and processing industries including pulp & paper facilities, offshore topside installations, and flue gas desulphurization (FGD) applications.
“Both thin sheet used for wall paper in FGD scrubbers as well as solid plate help ensure long-lasting functionality over time,” reports Arnvig. “This is particularly important in the China market where there is a growing need for FGDs,” stresses Arnvig. Ultra 254 SMO is also used in the repair and replacement of FGDs.
Facilities in close proximity to sea and seawater environments are another classic application for 6-molys. Other applications for them include water handling systems where excessive microbiological activities are common.
“When water from rivers and streams are used in the processing at a plant, these grades may be specified over 316 for better corrosion resistance to these ‘hungry’ microbes,” concludes Arnvig.
Published Jul 01, 2015