Hardness

Room Temperature*

Form Aging Temperature Aging Time Hardness
°F °C h HRA
Sheet Solution-annealed - 52
1000 538 1000 64
4000 66
8000 65
16000 67
1200 649 1000 56
4000 55
8000 56
16000 55
1400 760 1000 54
4000 54
8000 53
16000 54
Plate Solution-annealed - 57
800 427 1000 57
4000 52
8000 52
16000 56
1000 538 1000 64
4000 63
8000 65
16000 67
1200 649 1000 57
4000 55
8000 56
16000 57
1400 760 1000 57
4000 57
8000 56
16000 57
1600 871 1000 56
4000 56
8000 54
16000 54
All
Weld Metal**
As-Welded - 56
1000 538 1300 64
4000 66
1200 649 1000 55
4000 59
8000 57
16000 58

*Single tests from a single hear for each form    **Gas tungsten arc welded
HRA = Hardness Rockwell “A"

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