Difference betwen Inconel 625 and 626lcf
Difference betwen Inconel 625 and 626lcf
(OP)
Hi to all,
I have a question for materials based on Nikel Alloys.
I have to select a nikel alloy to construct bellows (thermal expansion joint) and i found that there are two different type of Inconel 625:
- grade 2 as per ASTM A443 (hot worked in sheets;
- 626 lcf (worked in special condition in order to make hi performancies for fatigue);
so my question is which are the differencies between the two materials?
Thanks a lot, regards Vincenzo.
I have a question for materials based on Nikel Alloys.
I have to select a nikel alloy to construct bellows (thermal expansion joint) and i found that there are two different type of Inconel 625:
- grade 2 as per ASTM A443 (hot worked in sheets;
- 626 lcf (worked in special condition in order to make hi performancies for fatigue);
so my question is which are the differencies between the two materials?
Thanks a lot, regards Vincenzo.





RE: Difference betwen Inconel 625 and 626lcf
http://
U.S patent 4765956.
from the patent:
"SUMMARY OF INVENTION
It has now been discovered that the low cycle and thermal fatigue life of alloys described herein can be markedly improved provided the carbon, nitrogen and silicon contents are controlled and correlated such that the sum of the % carbon+% nitrogen+1/10% silicon does not exceed about 0.04% and is preferably not greater than about 0.035%. Moreover, low cycle and thermal fatigue is further enhanced if the alloys are processed by vacuum induction melting followed by electroslag refining. "
RE: Difference betwen Inconel 625 and 626lcf
The alloy has to be made correctly and fabricated very carefully.
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Plymouth Tube
RE: Difference betwen Inconel 625 and 626lcf