URANUS® 65 - Telus applications

1 uranus 65310 L modified grade - C < , Si < for nitric acid servicesStandardsChemical analysis - Weight %Mechanical propertiesUR65 Rev 1 - 14/02/2011 issue - page 1UR 65 is a 25 Cr 20 Ni austenitic stainless steel withsharp control of the residual elements in order to providehigh corrosion resistance properties in boiling 50-65%Nitric acid solutions. The silicon content is kept while the carbon content is lower than Molybdenum additions are also well known to reduce thebehaviour of the steel in nitric acid solutions. Thisexplains why the molybdenum content is guaranteedlower than .The sharp control of Carbon, Silicon and <.3< .3Nb < - Mn < F 1%UTSEl% X1 Cr Ni NAGcontents makes it possible to produce a more stable austenite microstructure, free of intermetallic or carbideprecipitations.

2 The alloy is designed for nitric acid applications . The grade is not recommended for concentrated nitricacid purposes or highly oxydizing nitric acid solutions(with Cr VI )Tensile properties - Minimum guaranteed valuesImpact valueHigh impact strength even at cryogenic temperatures -Average hardness =155 HBTypical values (% weight)UR65 Rev 1 - 14/02/2011 issue - page 2 Physical propertiesCorrosion resistanceIntervaltemperatureThermalexpa nsion C FResistivityThermalconductivityYoungmodu lusEShearmodulusG Ca x10-6K-1 = 7900 kg/m3 Because of its high chromium content, UR 65 has anexcellent resistance in boiling nitric acid solutions of lessthan about 70% these conditions, the alloy behaves much better than304 L , thanks to the close control of impurities suchas carbon, silicon, phosphorus which are known to bedeleterious to the resistance of stainless steels in nitricacid solutions in the sensitized condition, UR 65 gradeperforms very well in HNO3solution up to 70%.

3 Nitric acid solutions containing CrVIspecies are muchmore oxydant than usual HNO3solutions. In those cases,UR 65 is normaly not to be used. Please, contact us formore 65 melts are optimised to improve corrosion resis-tance in nitric acid solutions, even after rates of solution annealed stainless steels innitric acid solutionsHuey tests A262 Practice C - 5 x 48 hoursCorrosion rate (mm/year)Without sensitizationAfter 1hour at 675 CAfter hourat 700 C+ Slow cooling (50 C/h)< (6 mpy)< (8 mpy)< (10 mpy) PittingUR 65 has approximately the same pitting corrosionresistance as Rev 1 - 14/02/2011 issue - page 3 WeldingThe welding of fully austenitic material requires precautions against hot manganese addition in the filler wire,- low heat input (< 15 KJ/cm)

4 - controlled welding conditions- prevention of deformations during the corrosion resistance point of view, GTAW/TIGwelding is the prefered method and welds in contact withthe corrosive solution should preferably be welded usingthis materials:TIG - MIGFP SOUDAGE uranus 65 SPRINT METAL SOUDINOX 65 ELECTRODESOUDOMETAL SOUDINOX S65 UTP KbOur welding research centre provides technical assistancefor the welding of UR treatment1100/1150 C (2010/2100 F)followed by rapid forming is easy as for all austenitic forming does not impair the corrosion resistance andno heat treatment is required after cold prefered methods of cutting are shearing or to austenitic steelsFabricationOperationToolLubricatio nConditionsBlade widthmmBlade width- inFeed - mm/tFeed - in/tSpeed -m/minSpeed -ft/minPartingoffHigh speedsteelCutting speedsteelDrill mmDrill inFeed - mm/tFeed - in/tSpeed -m/minSpeed -ft/minCutting speedsteelDry orCutting oilFeed - mm/tFeed - in/tSpeed -m/minSpeed - Rev 1 - 14/02/2011 issue - page 4 This technical data and information represents our best knowledge at the time of printing.

5 However, itmay be subject to some slight variations due to our ongoing research programme on corrosion therefore suggest that information be verified at time of enquiry or , in service, real conditions are specific for each application. The data presented here is only for the purpose of description and may only be considered as guarantees when our company has givenwritten formal any information,please contact :Industeel FranceLe Creusot Plant56 rue ClemenceauF-71201 Le Creusot CedexTel +33 (0)3 85 80 55 31 Fax +33 (0)3 85 80 54 11 Industeel Belgium266 rue de ChateletB-6030 Marchienne au PontTel +32 71 44 16 99 Fax +32 71 44 19 rangeUR 65 is used in all processes involving hot nitric acid upto 70 % concentration (14 N).

6 (solutions free of CrVIspecies or other very oxydizing species):- Production of nitric acid,- Ammonium nitrate production,- Nuclear fuel reprocessing- Hydrofluoric sizes are available on request, including 4100mm( ) width rolled platesClad platesThickness5 up to 150 mm3/16 to 6 6 up to 150 mm1/4 to 6 WidthUp to 3300 mmUp to 130 Up to 3300 mmUp to 130 LengthUp to 12000 mmUp to 39ftUp to 14000 mmUp to 46 ft