Wrought HAYNES® 282® alloy is furnished in the solution annealed condition unless otherwise specified. After component fabrication, the alloy would normally again be solution annealed at 2050 to 2100°F (1121 to 1149°C) for a time commensurate with section thickness and rapidly cooled or water-quenched for optimal properties. Following solution annealing, the alloy is given a two-step age-hardening treatment to optimize the microstructure and induce age-hardening. The first step is 1850°F (1010°C) for 2 hours followed by rapid or air cooling. The second step is 1450°F (788°C) for 8 hours followed by air cooling.
NOTE: For information regarding ASME Advanced – Ultra Super Critical (A-USC) applications, please contact Vinay Deodeshmukh (765-456-6212; VDeodeshmukh@haynesintl.com).
HAYNES® 282® alloy has excellent forming characteristics. It may be hot-worked at temperatures in the range of about 1750-2150°F (955-1177°C) provided the entire piece is soaked for a time sufficient to bring it uniformly to temperature. Initial breakdown is normally performed at the higher end of the range, while finishing is usually done at the lower temperatures to afford grain refinement.
As a consequence of its good ductility, 282® alloy is also readily formed by cold-working. Intermediate annealing may be performed at 2050 to 2100°F (1121 to 1149°C) for a time commensurate with section thickness and rapidly cooled or water-quenched, to ensure maximum formability. All hot- or cold-worked parts should normally be annealed prior to age-hardening (as described in the “Heat Treatment” section) in order to develop the best balance of properties.
*Based upon rolling reductions taken upon a solution annealed 0.125” (3.2 mm) thick sheet
HRB = Hardness Rockwell “B”.
HRC = Hardness Rockwell “C”.
HAYNES® 282® alloy has similar machining characteristics to other nickel alloys used at high temperatures. Rough machining should be carried out prior to age-hardening. Final machining or finish grinding may be done after age-hardening. Machining guidelines can be found in the Welding and Fabrication section of this website. If further information is required, please contact the technical support group at Haynes International