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Fabrication

Heat Treatment

HAYNES® 625 alloy is normally final annealed at 1925°F (1052°C) for a time commensurate with section thickness. Annealing during fabrication can be performed at even lower temperatures, but a final subsequent anneal at 1925°F (1052°C) is usually required to produce optimum structure and properties.  Please see Haynes International publication H-3159 for further information.

 Effect of Cold Reduction Upon Room-Temperature Properties

Cold Reduction Subsequent Anneal Temperature 0.2% Yield Strength Ultimate Tensile Strength Elongation Hardness
% - ksi MPa ksi MPa % HR C/BW
None None 70 483 133 917 46 97 HRBW
10 None 113 779 151 1041 30 32 HRC
20 140 965 169 1165 16 37 HRC
30 162 1117 191 1317 11 40 HRC
40 178 1227 209 1441 8 42 HRC
50 184 1268 223 1538 5 45 HRC
10 1850°F (1010°C) 63 434 134 924 46 -
20 71 490 138 951 44 -
30 78 538 141 972 44 -
40 82 565 141 972 42 -
50 82 565 141 972 42 -
10 1950°F (1065°C) 61 421 133 915 46 -
20 71 490 137 945 45 -
30 77 531 140 965 44 -
40 83 572 142 979 42 -
50 82 565 141 972 42 -
10 2050°F (1120°C) 58 400 128 883 50 -
20 67 462 135 931 46 -
30 58 400 127 876 52 -
40 72 496 137 945 44 -
50 61 421 130 896 50 -
10 2150°F (1175°C) 52 359 122 841 55 -
20 54 372 124 855 55 -
30 53 365 122 841 56 -
40 52 359 122 841 55 -
50 51 352 119 820 58 -

*Tensile results are averages of two or more tests.
*Rapid Air Cool
HRC = Hardness Rockwell “C”.
HRBW = Hardness Rockwell “B”, Tungsten Indentor.

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