Heat Treatment
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: The heat treatment for Advanced Ultra-Supercritical (A-USC), Supercritical CO2, and Other ASME Boiler Code Applications is different from the standard heat treatment. For information regarding the heat treatment for ASME
code related applications, please click here.
Hot and Cold Working
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.
Cold Forming Characteristics
Average Room-Temperature Hardness and Tensile Properties of
Solution Annealed HAYNES® 282® alloy
Form |
Hardness |
0.2% Yield Strength |
Ultimate Tensile Strength |
Elongation |
Reduction of Area |
- |
HRB |
ksi |
MPa |
ksi |
MPa |
% |
% |
Sheet |
90 |
56 |
384 |
122 |
839 |
59 |
- |
Plate |
93 |
56 |
384 |
120 |
830 |
60 |
61 |
Bar |
86 |
51 |
348 |
118 |
816 |
62 |
69 |
Hardness vs. Cold Work (Sheet)
Alloy |
0% |
10% |
20% |
30% |
40% |
50% |
282® |
93 HRB |
26 HRC |
33 HRC |
38 HRC |
41 HRC |
43 HRC |
R-41 |
96 HRB |
30 HRC |
36 HRC |
39 HRC |
41 HRC |
42 HRC |
Waspaloy |
94 HRB |
26 HRC |
32 HRC |
37 HRC |
39 HRC |
41 HRC |
263 |
89 HRB |
19 HRC |
27 HRC |
33 HRC |
37 HRC |
39 HRC |
625 |
97 HRB |
32 HRC |
37 HRC |
40 HRC |
42 HRC |
45 HRC |
Effect of Cold Reduction on Room-Temperature Tensile Properties*
Cold Reduction |
0.2% Yield Strength |
Ultimate Tensile Strength |
Elongation |
% |
ksi |
MPa |
ksi |
MPa |
% |
0 |
55.5 |
383 |
121.0 |
834 |
58.0 |
10 |
87.8 |
605 |
131.8 |
909 |
46.7 |
20 |
114.5 |
790 |
144.9 |
999 |
31.5 |
30 |
139.7 |
963 |
165.4 |
1141 |
15.5 |
40 |
158.5 |
1093 |
184.2 |
1270 |
8.9 |
50 |
174.7 |
1204 |
200.4 |
1382 |
6.6 |
60 |
190.4 |
1312 |
215.4 |
1485 |
5.6 |
*Based upon rolling reductions taken upon a solution annealed 0.125” (3.2 mm) thick sheet
HRB = Hardness Rockwell “B”.
HRC = Hardness Rockwell “C”.