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Recrystallization Temerature?
- Thread starter sk10009
- Start date
- Thread starter
- #3
The designations are
F11 - 1.25% Cr -1/2%Mo
F22 - 2.25% Cr -1% Mo
F5 - 5%Cr- 1%Mo
F9 - 9% Cr-1%Mo
The recrystallization temperature will be at or above the lower critical transformation temperature for the Cr-Mo low alloy steels because the above low alloy steels would be supplied in an annealed or normalized and tempered condition as part of ASTM/ASME specifications.
Lower critical transformation temperatures;
1375 deg F (741 deg C) for F11
1430 deg F (775 deg C) for F22
1505 deg F (820 deg C) for F5
1490 deg F (810 deg C) for F9
Ref;ASME B31.1 Power Piping Code
F11 - 1.25% Cr -1/2%Mo
F22 - 2.25% Cr -1% Mo
F5 - 5%Cr- 1%Mo
F9 - 9% Cr-1%Mo
The recrystallization temperature will be at or above the lower critical transformation temperature for the Cr-Mo low alloy steels because the above low alloy steels would be supplied in an annealed or normalized and tempered condition as part of ASTM/ASME specifications.
Lower critical transformation temperatures;
1375 deg F (741 deg C) for F11
1430 deg F (775 deg C) for F22
1505 deg F (820 deg C) for F5
1490 deg F (810 deg C) for F9
Ref;ASME B31.1 Power Piping Code
sk10009,
The subject materials are normally not subject to cold work. As metengr stated, they are suplied in the annealed or normalized and tempered condition. Recrystallization after cold work will occur at temperatures approximately 200 to 300 F below the lower critical temperature.
The subject materials are normally not subject to cold work. As metengr stated, they are suplied in the annealed or normalized and tempered condition. Recrystallization after cold work will occur at temperatures approximately 200 to 300 F below the lower critical temperature.
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