Nimonic alloy 263 is an age-hardenable nickel-cobalt-chrome-molybdenum alloy which was designed to have excellent fabrication characteristics in the annealed condition but also very good aged strength properties. Alloy 263 is easier to form or weld than other materials such as Waspaloy or Rene 41 and exhibits excellent intermediate temperature ductility. Alloy 263 is supplied in the annealed condition and its excellent ductility in this condition makes it suitable for cold forming as well as hot working. Alloy 263 can be welded using matching composition filler wire in both TIG and MIG forms. The recommended heat treatments for Nimonic 263 are as follows: Extruded Bar: Solution Treatment - 1150 °C for 1.5-2.5 hours + water quench Ageing Treatment - 800 °C for 8 hours + air cool  (As per BS HR10 / AMS 5886) Hot-rolled Sheet Solution Treatment - 1150 °C for 0.5 hours + water quench or air cool Ageing Treatment - 800 °C for 8 hours + air cool (As per BS HR206/ AMS 5872) Cold-rolled Sheet Solution Treatment - 1150 °C for 3-10 mins + water quench or fluidized bed quenching Ageing Treatment - 800 °C for 8 hours + air cool (As per BS HR206 / AMS 5872)  Availability Nimonic / Haynes Allou 2633 is available in Sheet, Strip, Plate, Bar, Round Bar, Flat Bar, Wire, Tube and Forgings. For all stock availability contact Sales. Technical Data Chemical Composition Limits Weight% Ni Cr Mn Si C Al Ag B Fe 263 Bal 19-21 0.60 max 0.40 max 0.04-0.08 0.60 max 0.0005 max 0.005 max 0.07 max Weight% Cu Mo Co Ti Al+Ti Pb Bi S   263 0.20 max 5.6-6.1 19-21 1.90-2.40 2.40-2.8 0.0020 max 0.0001 max 0.007 max   Mechanical Properties Material Temp °C Yield Strength 0.2% (Mpa) Tensile Strength (Mpa) Elongation % Hardness HB Nimonic 263 Bar Solution Treated (AMS 5886/ BS HR10) RT - - - 248 max Nimonic 263 Bar Heat Treated (AMS 5886 / BS HR10)  RT 585 (typical) 1004 (typical) 45 - Nimonic 263 Bar Heat Treated (AMS 5886/ BS HR10) 780 403 (min) 541 (min) 12 - Material Temp °C Yield Strength (Mpa) Tensile Strength (Mpa) Elongation % Hardness HRC Nimonic 263 Sheet Solution Treated (AMS 5872 / BS HR206) RT - - - 22.5 max Nimonic 263 Sheet Heat Treated (AMS 5872 / BS HR206 RT 580 (typical) 973 (typical) 39 -   Nimonic 263 Sheet Heat Treated (AMS 5872 / BS HR206 780 403 (min) 541 (min) 9 - Specifications UNS N07263 Werkstoff Nr. 2.4650 BS HR10 Rod and Bar BS HR 206 Plate, Sheet, Strip BS HR 404 Seamless Tube AECMA PrEn 2199 Bar AECMA PrEn 2200 Forgings AECMA PrEn 2201 Bar AECMA PrEn 2202 Tube AECMA PrEn 2203 Sheet, Strip AECMA PrEn 2418 Plate DIN 17750 Plate, Sheet, Strip DIN 17751 Pipe and Tube DIN 17752 Bar and Rod DIN 17753 Wire DIN 17754 Forgings  AMS 5872 Sheet, Plate and Strip AMS 5886 Bar, Forgings, Rings AFNOR NCK 20 D AIR 9165 Sheet, Plate, Rod, Bar and Forgings MSRR 7035 MSRR 7036 GE B50A774A  Tradename's: Nicrofer 5120, Hastelloy C263 and Nimonic 263.